ASPHALT CONCRETE MIXTURES. Objectives:

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "ASPHALT CONCRETE MIXTURES. Objectives:"

Transcription

1 ASPHALT CONCRETE MIXTURES Objectives: To introduce asphalt concrete To explain the asphalt concrete mixture To explain the types of asphalt concrete mixtures To explain the requirements of aggregates for asphalt concrete

2 ASPHALT CONCRETE: Introduction Asphalt concrete is basically a mixture of asphalt cement and aggregates, hot-mixed in an asphalt plant and then hot-laid to form the surface course of a flexible pavement The properties of asphalt concrete depend on: the quality of its components (i.e., asphalt binder and aggregates) the mix proportions construction process Asphalt concrete must provide a stable, safe, and durable road surface

3 ASPHALT CONCRETE: Stability Stability of the asphalt concrete depends on the strength and flexibility of the mixture and the degree of compaction during placing The strength must be sufficient to carry the load without shear occurring between particles. The structure must remain intact. The main contributor to strength is friction between grains. A dense-graded mixture, composed of particles with rough faces, with a relatively thin asphalt film between them is best for high-friction strength. Flexibility is also important as the pavement distributes the imposed load by deflecting slightly as the load is applied, without cracking or permanent deformation. To meet this requirement, a more open-graded mixture, with a higher asphalt content, is best. Strength and flexibility are evaluated by various tests, depending on the design method being used

4 ASPHALT CONCRETE: Safety Safety is very important for the surface course Safety is achieved by making the surface course skid resistant and able to allow quick drainage of water from the surface. Skid resistance is enhanced by using smaller sized, very hard aggregates for the surface course. This provides more points of contact for the development of friction forces. Open-graded surface courses are used in very heavy traffic areas to allow immediate drainage of rainwater before it can result in hydroplaning.

5 ASPHALT CONCRETE: Durability Durability of the asphalt concrete is critical to ensure that it maintains the stability and skid resistance properties for the design service life Asphalt ages, and pavements become denser (i.e., aged) with time and traffic Pavements fail (i.e., durability of pavement is lost) due to: changes in the aggregates permanent deformation or rutting cracking, either due to fatigue, or low temperatures bleeding of asphalt to the surface

6 ASPHALT CONCRETE MIXTURE Asphalt concrete mixture basically consists of asphalt cement, aggregates, and air. Out of the total asphalt added to the mixture, some of the asphalt is absorbed in the pores of the aggregate particles. The portion of asphalt absorbed by aggregate particles is called absorbed asphalt The net amount of asphalt available to coat and bind aggregates together is called effective asphalt

7 ASPHALT CONCRETE MIXTURE---contd. The mass/volume relationships of a compacted asphalt mixture are illustrated in the following figure: Mass/volume relationships for an asphalt concrete mixture: Density () Asphalt content (P B ) Effective asphalt content (P BE ) Asphalt absorption (P BA ) Air voids (AV) = M/V P B = M B / M P BE = M BE / M P BA = M BA / M G AV = V A / V Voids in mineral aggregate (VMA) VMA = (V BE + V A )/V Voids filled with asphalt (VFA) VFA = V BE / (V BE + V A ) M Total mass (= M G + M B ) M G Mass of aggregate M B Mass of asphalt (binder) (= M BE + M BA ) M BE Mass of effective asphalt, the asphalt binder between particles M BA Mass of absorbed asphalt, absorbed into the pores of the aggregate particles V Total volume of the compacted mix V G Volume of aggregate, the bulk volume including the aggregate pores V BE Volume of effective asphalt V BA Volume of absorbed asphalt V B Volume of asphalt (= V BE + V BA ) V A Volume of air between the coated aggregate particles in the mix V GE Effective volume of aggregate (= V G V BA ) V MM Volume of voidless mix (maximum mix volume)

8 TYPES OF ASPHALT CONCRETE MIXTURES Asphalt concrete mixtures can be classified into following two types based on whether hot-mixed, hot laid or cold-mixed, cold-laid: Hot-mixed, hot-laid asphalt (HMA) concrete mixture Cold-mixed, cold-laid asphalt concrete mixture Asphalt concrete mixtures can be classified into following two types based on whether in-situ-mixed or plant-mixed: Road-mixed or in place-mixed asphalt concrete mixture Plant-mixed asphalt concrete mixture HMA concrete mixtures can be classified into following three types based on type of aggregate grading used: Dense-graded HMA concrete mixture Stone matrix asphalt (SMA) concrete mixture Open-graded HMA concrete mixture Asphalt concrete mixtures can be classified into following three types based on type additives used: Rubber-modified asphalt concrete mixture Polymer-modified asphalt concrete mixture Sulfur-modified asphalt concrete mixture

9 TYPES OF ASPHALT CONCRETE MIXTURES Hot-mixed asphalt (HMA) concrete A hot-mixed asphalt (HMA) concrete is a mixture of asphalt, fine aggregate or both fine and coarse aggregates, and mineral filler (optional) The grade of asphalt to be used depends on: the type of construction climatic conditions amount and nature of traffic HMA concrete is produced and laid in the following steps: both aggregate and asphalt are heated prior to mixing to drive off moisture from the particles and make the asphalt sufficiently fluid (maximum temperatures for heating asphalt cement and emulsified asphalt are F and 82.2 F, respectively) after heating, all the raw materials are mixed in the plant, and the hot mixture is transported to the paving site and spread on a loosely compacted layer to a uniform, even surface with the help of a paving machine while the mixture is hot it is compacted by heavy, motor-driven rollers to produce a smooth, well-compacted paving course Since the aggregates are thoroughly dried prior to mixing, stripping of asphalt (i.e., removal from the pavement) will not take place in hotmixed, hot-laid asphalt pavements

10 TYPES OF ASPHALT CONCRETE MIXTURES Cold-mixed asphalt concrete Like a hot-mixed asphalt concrete, cold-mixed asphalt concrete is also a mixture of asphalt, fine aggregate or both fine and coarse aggregates, and mineral filler (optional) Cold-mixed asphalt concrete is produced and laid at normal temperature, however, some heating of both the aggregates and asphalt may be required during winter season Drying of aggregates is not necessary except when the particles have surface moisture To improve bonding, commercial additives are needed in this type of asphalt concrete

11 TYPES OF ASPHALT CONCRETE MIXTURES Dense-graded HMA concrete A dense-graded HMA concrete is produced using well-graded aggregates, and intended for general use When properly designed and constructed, a dense-graded HMA concrete is relatively impermeable Dense-graded HMA concrete mixes are generally referred to by their nominal maximum aggregate size They can further be classified as either fine-graded or coarse-graded. Fine-graded mixes have more fine and sand sized particles than coarse-graded mixes

12 TYPES OF ASPHALT CONCRETE MIXTURES Dense-graded HMA concrete Fine- and course-graded definitions for dense-graded HMA concrete are presented in the following Table: Mixture Nominal Maximum Aggregate Size Coarse-Graded Mix Fine-Graded Mix 37.5 mm (1.5 inches) 25.0 mm (1.0 inch) 19.0 mm (0.75 inches) 12.5 mm (0.5 inches) 9.5 mm (0.375 inches) < 35 % passing the 4.75 mm (No. 4 Sieve) < 40 % passing the 4.75 mm (No. 4 Sieve) < 35 % passing the 2.36 mm (No. 8 Sieve) < 40 % passing the 2.36 mm (No. 8 Sieve) < 45 % passing the 2.36 mm (No. 8 Sieve) > 35 % passing the 4.75 mm (No. 4 Sieve) > 40 % passing the 4.75 mm (No. 4 Sieve) > 35 % passing the 2.36 mm (No. 8 Sieve) > 40 % passing the 2.36 mm (No. 8 Sieve) > 45 % passing the 2.36 mm (No. 8 Sieve)

13 TYPES OF ASPHALT CONCRETE MIXTURES Open-graded HMA concrete An open-graded HMA mixture is designed to be water permeable (dense-graded and SMA mixes usually are not permeable) Open-graded mixes use only crushed stone (or gravel) and a small percentage of manufactured sands. There are three types of open-graded mixes typically used in the U.S.: Open-graded friction course (OGFC). Typically 15 percent air voids, no minimum air voids specified, lower aggregate standards than Porous European mixes (PEM). Porous European mixes (PEM). Typically percent air voids, specified minimum air voids, higher aggregate standards than OGFC and requires the use of asphalt binder modifiers. See Figure Asphalt treated permeable bases (ATPB). Less stringent specifications than OGFC or PEM since it is used only under densegraded HMA, SMA or PCC for drainage

14 AGGREGATES FOR ASPHALT CONCRETE MIXTURES Introduction In asphalt concrete mixture, aggregates may constitute about 70-75% by volume or 90-95% by weight The roles of aggregates in a asphalt concrete pavement are to distribute wheel loads through point-to-point contact (aggregate interlock) ensuring stability of pavement (i.e., resistance to pavement deformation under load) provide resistance to abrasion and skid A number of factors, such as quality, gradation, shape, stiffness, and quantity of aggregates, determine effectiveness of aggregates in load transfer and the stability of pavement Aggregates for asphalt concrete are usually classified as coarse aggregates, fine aggregates, and mineral filler Mineral filler is often used in asphalt concrete mixtures to supply the fines (smaller than 75 m or No. 200 sizes) Fines are very important in producing a dense-graded, strong material. Many natural sands do not contain the amount or type of fines required. Limestone dust is the most common material used for mineral filler

15 AGGREGATES FOR ASPHALT CONCRETE MIXTURES General requirements Aggregates should be: well-graded dense, including mineral filler (if required) for strength hard for resistance to wear and to polishing due to traffic. sound for resistance to breakdown due to freezing and thawing. rough surfaced crushed rough surfaces give higher friction strength and a better surface for adhesion of the asphalt cement. free from cubical thin, elongated aggregate particles because they are broken easily. hydrophobic (or water hating ) some siliceous aggregates such as quartz are hydrophobic ( water liking ), meaning that they have a greater affinity for water than for asphalt, due to their surface charges. This may lead to stripping, as asphalt coating comes away from the particle in the presence of water. free from deleterious substances clay particles, dust, dirt, and lightweight pieces may lead to a lower quality asphalt film on the aggregate particles or may result in breaking of some of the particles.

16 AGGREGATES FOR ASPHALT CONCRETE MIXTURES Types of aggregate gradation Following two types of aggregate gradation are commonly used in pavement construction: (i) open gradation and (ii) dense gradation Open-graded aggregate is an aggregate containing little or no fine aggregate, or one in which the void content in the compacted aggregate is relatively large, as large as 20% Open-graded aggregate is used to make opengraded asphalt concrete, which provides good skid resistance and high permeability so as to permit good surface drainage Dense-graded aggregate is an well-graded aggregate containing fine aggregate filling the voids in coarse aggregate Use of dense-graded aggregate provides a dense and impermeable layer and does not normally require surface treatment or seal coat

1.1 SCOPE: 1.2 DEFINITIONS:

1.1 SCOPE: 1.2 DEFINITIONS: PART 1 GENERAL 1.1 SCOPE: A. This work consists of establishing the JMF for HMAC for use in road and street constructions and/or repairs. Once established and accepted the JMF will be used to determine

More information

HOT MIX ASPHALT TENDER ZONE

HOT MIX ASPHALT TENDER ZONE NCAT Report 00-02 HOT MIX ASPHALT TENDER ZONE By E.R. Brown Byron Lord Dale Decker Dave Newcomb April 2000 277 Technology Parkway Auburn, AL 36830 HOT MIX ASPHALT TENDER ZONE By E.R. Brown Director National

More information

1.1 SECTION INCLUDES.1 Materials and installation for asphalt concrete pavement for car park areas, driveways to buildings, and walks or play areas.

1.1 SECTION INCLUDES.1 Materials and installation for asphalt concrete pavement for car park areas, driveways to buildings, and walks or play areas. Issued 2005/06/01 Section 02742 Asphalt Concrete Pavement for Building Sites Page 1 of 8 PART 1 GENERAL 1.1 SECTION INCLUDES.1 Materials and installation for asphalt concrete pavement for car park areas,

More information

Binders Superpave and Polymers SMA, OGFC and Dense-Graded Superpave mix design Warm Mix Reclaimed Asphalt Pavement (RAP) Roofing Shingles

Binders Superpave and Polymers SMA, OGFC and Dense-Graded Superpave mix design Warm Mix Reclaimed Asphalt Pavement (RAP) Roofing Shingles Shift from new construction to renewal and preservation Functional improvements for safety and smoothness needed more than structural improvements Perpetual Pavements Material improvements Binders Superpave

More information

Chapter 4. Glossary. Petroleum Asphalt - Asphalt refined from crude petroleum by various processes.

Chapter 4. Glossary. Petroleum Asphalt - Asphalt refined from crude petroleum by various processes. Chapter 4 Glossary 1. Bituminous Binder Materials Asphalt - A black or dark brown solid or semi-solid cementitious material which gradually liquefies when heated. The predominant constituents are bitumens

More information

SECTION 331 TYPE S ASPHALT CONCRETE

SECTION 331 TYPE S ASPHALT CONCRETE SECTION 331 TYPE S ASPHALT CONCRETE 331-1 Description. Construct a Type S-I, Type S-II or Type S-III Asphalt Concrete as specified by the Contract. When offered as alternates, either Type may be constructed.

More information

THIN ASPHALT OVERLAYS FOR PAVEMENT PRESERVATION

THIN ASPHALT OVERLAYS FOR PAVEMENT PRESERVATION THIN ASPHALT OVERLAYS FOR PAVEMENT PRESERVATION Why Thin Asphalt Overlays? Shift from new construction to renewal and preservation Functional improvements for safety and smoothness are needed more than

More information

City of Regina Standard Construction Specification SECTION 2325 SUPPLY OF ASPHALTIC CONCRETE 1.0 GENERAL. 1.1 Scope

City of Regina Standard Construction Specification SECTION 2325 SUPPLY OF ASPHALTIC CONCRETE 1.0 GENERAL. 1.1 Scope 1.0 GENERAL 1.1 Scope 2.0 PRODUCTS 1.1.1 The asphaltic concrete shall consist of a homogeneous mixture of mineral aggregate, filler and asphaltic binder, combined in accordance with these Specifications.

More information

Asphalt concrete mix design

Asphalt concrete mix design CEEN 3144 Construction Materials Asphalt concrete mix design Francisco Aguíñiga Assistant Professor Civil Engineering Program Texas A&M University Kingsville Page 1 Asphalt concrete Hot-mix asphalt Asphalt

More information

An Evaluation of the Bailey Method to Predict Voids in the Mineral Aggregate

An Evaluation of the Bailey Method to Predict Voids in the Mineral Aggregate An Evaluation of the Bailey Method to Predict Voids in the Mineral Aggregate John P. Zaniewski Craig Mason Asphalt Technology Program Department of Civil and Environmental Engineering Morgantown, West

More information

ASPHALT CONCRETE PAVING

ASPHALT CONCRETE PAVING CITY OF BRAMPTON LANDSCAPE SPECIFICATIONS SECTION 02743-1 PART 1 GENERAL 1.1 Related Work.1 All Division 1 Specification Sections.2 Section 01330 Submittals.3 Section 01450 Quality Control & Inspection.4

More information

Specification Gravel/ Bitumen/ Asphalt Driveways

Specification Gravel/ Bitumen/ Asphalt Driveways Specification Gravel/ Bitumen/ Asphalt Driveways Contents 1 Scope of Works... 1 2 General... 2 3 Traffic Control... 2 4 Materials... 2 4.1 Sub-Grade Fill Material... 2 4.2 Crushed Limestone... 2 4.3 Gravel...

More information

SPECIFICATION FOR DENSE GRADED AND STONE MASTIC ASPHALTS

SPECIFICATION FOR DENSE GRADED AND STONE MASTIC ASPHALTS SPECIFICATION FOR DENSE GRADED AND STONE MASTIC ASPHALTS Table of Contents 1 GENERAL... 3 1.1 Scope... 3 1.2 References... 3 1.2.1 Austroads... 3 1.2.2 New Zealand Transport Agency... 3 1.2.3 Standards

More information

Binders Superpave and Polymers SMA, OGFC and Dense-Graded Superpave mix design Warm Mix Reclaimed Asphalt Pavement (RAP) Roofing Shingles

Binders Superpave and Polymers SMA, OGFC and Dense-Graded Superpave mix design Warm Mix Reclaimed Asphalt Pavement (RAP) Roofing Shingles Shift from new construction to renewal and preservation Functional improvements for safety and smoothness needed more than structural improvements Perpetual Pavements Material improvements Binders Superpave

More information

2013 Supplement No. 1

2013 Supplement No. 1 AMENDMENTS to 2012 Manual of STANDARD SPECIFICATIONS Adopted by Standard Specifications Committee 2013 Supplement No. 1 Published by Utah LTAP Center Utah State University 8305 Old Main Hill Logan UT 84322-8205

More information

Thin Overlays. Robert W. Sauber Supervising Engineer. Pavement Preservation NJDOT. July 2009

Thin Overlays. Robert W. Sauber Supervising Engineer. Pavement Preservation NJDOT. July 2009 Thin Overlays By Robert W. Sauber Supervising Engineer July 2009 Pavement Preservation NJDOT Increasing need to repair and maintain rapidly deteriorating infrastructure leads to: More work zones More public

More information

Maintaining Gravel Roadways 17 th Annual TSAG Conference

Maintaining Gravel Roadways 17 th Annual TSAG Conference Maintaining Gravel Roadways 17 th Annual TSAG Conference Introduction- Gravel Roads What makes a good gravel road? Various sized crushed stones and fines that are compacted together to form a durable structure

More information

2.1. AASHTO T 84, Standard Method of Test for Specific Gravity and Absorption of Fine Aggregate

2.1. AASHTO T 84, Standard Method of Test for Specific Gravity and Absorption of Fine Aggregate Page 1 of 7-83 DESIGN METHOD FOR SELECTING OPTIMUM ASPHALT CEMENT CONTENT OF HOT-MIX ASPHALT BY MEANS OF THE MARSHALL APPARATUS 1. Scope 1.1. This procedure covers the Department's method of designing

More information

Chapter 11 MARSHALL METHOD OF ASPHALT-CONCRETE MIX DESIGN

Chapter 11 MARSHALL METHOD OF ASPHALT-CONCRETE MIX DESIGN Chapter 11 MARSHALL METHOD OF ASPHALT-CONCRETE MIX DESIN 11.1 INTRODUCTION Bituminous mixes (some times called asphalt mixes) are used in the surface layer of road and airfield pavements. The mix is composed

More information

Development of a Fundamental Skid Resistance Asphalt Mix Design Procedure

Development of a Fundamental Skid Resistance Asphalt Mix Design Procedure Development of a Fundamental Skid Resistance Asphalt Mix Design Procedure Sullivan, B.W. 1 1 Pavement Management Service, Sydney, Australia ABSTRACT Traditionally, when designing asphalt mixtures for skid

More information

GRADATION OF AGGREGATE FOR CONCRETE BLOCK

GRADATION OF AGGREGATE FOR CONCRETE BLOCK GRADATION OF AGGREGATE FOR CONCRETE BLOCK Although numerous papers have been written concerning the proper gradation for concrete mixes, they have generally dealt with plastic mixes, and very little published

More information

VOLUMETRIC ANALYSIS OF HMA MIXTURES. Volumetric Analysis of HMA Mixtures

VOLUMETRIC ANALYSIS OF HMA MIXTURES. Volumetric Analysis of HMA Mixtures VOLUMETRIC ANALYSIS OF HMA MIXTURES 1 Volumetrics All matter has mass and occupies space Volumetrics are the relationships between mass and volume 2 Specific Gravity, G Mass Volume * w 3 Basic Terms Specific

More information

HIGHWAYS DEPARTMENT GUIDANCE NOTES ON ROAD SURFACE REQUIREMENTS FOR EXPRESSWAYS AND HIGH SPEED ROADS

HIGHWAYS DEPARTMENT GUIDANCE NOTES ON ROAD SURFACE REQUIREMENTS FOR EXPRESSWAYS AND HIGH SPEED ROADS HIGHWAYS DEPARTMENT GUIDANCE NOTES ON ROAD SURFACE REQUIREMENTS FOR EXPRESSWAYS AND HIGH SPEED ROADS Research & Development Division RD/GN/032 June 2007 1. Purpose ROAD SURFACE REQUIREMENTS FOR EXPRESSWAYS

More information

AGREGADOS RECICLADOS MITOS Y REALIDADES

AGREGADOS RECICLADOS MITOS Y REALIDADES The Production and Use of Recycled Concrete in the USA Thomas Van Dam, Ph.D., P.E., FACI Principal Engineer CTL Group Introduction In the United States, concrete is the most commonly used recycled material

More information

ASPHALT CONCRETE PAVEMENT. Asphalt concrete pavement normally consists of two 40mm lifts.

ASPHALT CONCRETE PAVEMENT. Asphalt concrete pavement normally consists of two 40mm lifts. 17.1 Asphalt Concrete Pavement - General Asphalt concrete pavement consists of well-graded crushed coarse aggregate, fine aggregate and asphalt cement. When these components are properly mixed in an asphalt

More information

EVALUATION OF CONSTRUCTION LIMESTONE AGGREGATE SOURCED IN THE NORTHERN PART OF JORDAN USING SUPERPAVE TESTS

EVALUATION OF CONSTRUCTION LIMESTONE AGGREGATE SOURCED IN THE NORTHERN PART OF JORDAN USING SUPERPAVE TESTS EVALUATION OF CONSTRUCTION LIMESTONE AGGREGATE SOURCED IN THE NORTHERN PART OF JORDAN USING SUPERPAVE TESTS Ghazi Al-Khateeb, Turki Obaidat, and Taisir Khedaywi Assistant Professor of Civil Engineering,

More information

SECTION AGGREGATE BASE COURSE

SECTION AGGREGATE BASE COURSE SECTION 32 11 23 AGGREGATE BASE COURSE PART 1 - GENERAL 1.01 SECTION INCLUDES A. Aggregate base material. B. Installation standards. C. Spreading of material. D. Compacting. E. Field quality control. 1.02

More information

Testing and appraisal of Lucobit polymer effect as an additive on asphalt mixture performance

Testing and appraisal of Lucobit polymer effect as an additive on asphalt mixture performance Abstract Testing and appraisal of polymer effect as an additive on asphalt mixture performance Hamid Sabbagh mollahosseini*,golazin Yadollahi**, Ershad Amoosoltani*** *, ***Executive of Engineering and

More information

The Effect of Asphalt Concrete Micro & Macro Texture on Skid Resistance

The Effect of Asphalt Concrete Micro & Macro Texture on Skid Resistance Journal of Rehabilitation in Civil Engineering 1-1 (213) 15-28 journal homepage: http://civiljournal.semnan.ac.ir/ The Effect of Asphalt Concrete Micro & Macro Texture on Skid Resistance M.R. Ahadi 1*

More information

State of Nevada Department of Transportation Materials Division

State of Nevada Department of Transportation Materials Division State of Nevada Department of Transportation Materials Division METHOD OF TEST FOR DETERMINING BITUMEN RATIO OR ASPHALT CONTENT IN HOT MIX ASPHALT BY THE IGNITION METHOD SCOPE This test method covers the

More information

REFERENCE TO STANDARD SPECIFICATIONS CONCRETE AGGREGATE TESTS ON CONCRETE AGGREGATE CEMENT 4

REFERENCE TO STANDARD SPECIFICATIONS CONCRETE AGGREGATE TESTS ON CONCRETE AGGREGATE CEMENT 4 06005_Jan06_2014.pdf Page 1 of 14 INDEX Page 06005-1 REFERENCE TO STANDARD SPECIFICATIONS 2 06005-2 CONCRETE AGGREGATE 2 06005-3 TESTS ON CONCRETE AGGREGATE 3 06005-4 CEMENT 4 06005-5 PROVIDING CHEMICAL

More information

SPECIFIC GRAVITY OF COARSE AGGREGATE AASHTO T 85

SPECIFIC GRAVITY OF COARSE AGGREGATE AASHTO T 85 SPECIFIC GRAVITY OF COARSE AGGREGATE AASHTO T 85 GLOSSARY Absorption: The increase in weight due to water contained in the pores of the material. Bulk Specific Gravity (also known as Bulk Dry Specific

More information

SATURATED SURFACE-DRY SPECIFIC GRAVITY AND ABSORPTION OF AGGREGATES

SATURATED SURFACE-DRY SPECIFIC GRAVITY AND ABSORPTION OF AGGREGATES Test Procedure for SATURATED SURFACE-DRY SPECIFIC GRAVITY AND ABSORPTION OF TxDOT Designation: Tex-403-A Effective Date: August 1999 1. SCOPE 1.1 This method determines the saturated surface-dry (SSD)

More information

CHAPTER 7 TESTING OF ASPHALT CONCRETE MIXTURES

CHAPTER 7 TESTING OF ASPHALT CONCRETE MIXTURES CHAPTER 7 TESTING OF ASPHALT CONCRETE MIXTURES Asphalt Testing This section will deal with the methods of determining asphalt concrete properties by laboratory testing. In a hot-mix asphalt (HMA) paving

More information

Absorption and Specific Gravity. Specific Gravity

Absorption and Specific Gravity. Specific Gravity Absorption and Specific Gravity Specific Gravity Definition Ratio of the mass of a substance relative to the mass of an equal volume of water at a specified temperature. The density of water is 62.4 lb/ft3.

More information

Bailey Tool for Gradation Control in Superpave Mix Design

Bailey Tool for Gradation Control in Superpave Mix Design What is the Bailey Method? Bailey Tool for Gradation Control in Superpave Mix Design 48 th Annual Idaho Asphalt Conference The Bailey Method will Evaluate individual s Determine what is Coarse and Fine

More information

SECTION 609 PAVED DRAINAGE SECTION CONCRETE CURB, GUTTER AND PAVED DITCH.

SECTION 609 PAVED DRAINAGE SECTION CONCRETE CURB, GUTTER AND PAVED DITCH. SECTION 609 PAVED DRAINAGE SECTION 609.10 CONCRETE CURB, GUTTER AND PAVED DITCH. 609.10.1 Description. This work shall consist of constructing curb, gutter or combination curb and gutter and paved ditches

More information

Introduction to Open-Grade Friction Courses (OGFC)

Introduction to Open-Grade Friction Courses (OGFC) Introduction to Open-Grade Friction Courses (OGFC) by Gregory J. Taylor, P.E. COURSE OBJECTIVES This course presents an introduction to the subject of open-graded friction courses (OGFC). The contents

More information

SPECIFICATION FOR CONSTRUCTION OF UNBOUND GRANULAR PAVEMENT LAYERS

SPECIFICATION FOR CONSTRUCTION OF UNBOUND GRANULAR PAVEMENT LAYERS TNZ B/02:2005 SPECIFICATION FOR CONSTRUCTION OF UNBOUND 1. SCOPE This specification shall apply to the construction of unbound granular pavement layers. The term pavement layer shall apply to any layer

More information

August 2015 No. 900 SPECIFICATIONS FOR AGGREGATE FOR GRANULAR BASE COURSE

August 2015 No. 900 SPECIFICATIONS FOR AGGREGATE FOR GRANULAR BASE COURSE 900. 1 SCOPE SPECIFICATIONS FOR AGGREGATE FOR GRANULAR BASE COURSE These Specifications govern all operations necessary for and pertaining to the production of aggregate for granular base course. 900.

More information

COLD RECYCLING OF ASPHALT PAVEMENT - MIX IN PLANT

COLD RECYCLING OF ASPHALT PAVEMENT - MIX IN PLANT COLD RECYCLING OF ASPHALT PAVEMENT - MIX IN PLANT Torbjörn Jacobson Swedish National Road and Transport Research Institute SE-581 95 Linköping Sweden Abstract In Sweden, a total of about 1 million tonnes

More information

SECTION ASPHALT PAVING

SECTION ASPHALT PAVING SECTION 02720 PART 1 - GENERAL 1.01 DESCRIPTION A. Section includes specifications for hot-mix asphalt concrete (HMAC) track underlayment and asphalt concrete (AC) paving. Track underlayment includes all

More information

SPECIAL NOTE FOR ASPHALT WATERPROOFING MIX FOR BRIDGE-DECK OVERLAYS AND ADJACENT APPROACHES

SPECIAL NOTE FOR ASPHALT WATERPROOFING MIX FOR BRIDGE-DECK OVERLAYS AND ADJACENT APPROACHES SPECIAL NOTE FOR ASPHALT WATERPROOFING MIX FOR BRIDGE-DECK OVERLAYS AND ADJACENT APPROACHES 1. DESCRIPTION. Asphalt Waterproofing Mix (AWM) is a highly elastomeric, polymermodified, impermeable asphalt

More information

The AASHO Road Test site (which eventually became part of I-80) at Ottawa, Illinois, was typical of northern climates (see Table 1).

The AASHO Road Test site (which eventually became part of I-80) at Ottawa, Illinois, was typical of northern climates (see Table 1). Página 1 de 12 AASHO Road Test The AASHO Road Test, a $27 million (1960 dollars) investment and the largest road experiment of its time, was conceived and sponsored by the American Association of State

More information

RECYCLED CRUSHED CONCRETE BASE COURSE

RECYCLED CRUSHED CONCRETE BASE COURSE Section 02713 PART 1 G E N E R A L 1.01 SECTION INCLUDES A. Recycled crushed concrete base (RCCB) course. 1.02 MEASUREMENT AND PAYMENT A. Unit Prices. 1. Payment for RCCB is on per ton basis furnished

More information

Chapter 7: Pavement Rehabilitation 7-1 Asphalt Pavement Overlays 7-1 Surface Preparation Methods 7-2 Concrete Pavement Preparation 7-3 Recycling

Chapter 7: Pavement Rehabilitation 7-1 Asphalt Pavement Overlays 7-1 Surface Preparation Methods 7-2 Concrete Pavement Preparation 7-3 Recycling 7-1 Asphalt Pavement Overlays 7-1 Surface Preparation Methods 7-2 Concrete Pavement Preparation 7-3 Recycling Asphalt Pavements 7-7 Chapter 7 Pavement Rehabilitation Pavement rehabilitation can be accomplished

More information

Bituminous Concrete Surfaces

Bituminous Concrete Surfaces Bituminous Concrete Surfaces H. D. M etcalf Director of Maintenance, Kentucky State Highway Department Frankfort, Kentucky Kentucky is a rural state with many traditions, historical sites, and recreation

More information

August 2015 No. 920 INDEX FOR SPECIFICATIONS FOR AGGREGATE FOR BITUMINOUS PAVEMENT 920. 1 SCOPE... 1

August 2015 No. 920 INDEX FOR SPECIFICATIONS FOR AGGREGATE FOR BITUMINOUS PAVEMENT 920. 1 SCOPE... 1 INDEX FOR SPECIFICATIONS FOR AGGREGATE FOR BITUMINOUS PAVEMENT 920. 1 SCOPE... 1 920. 3 MATERIALS 3.1 Source of Supply... 1 3.2 Aggregate Requirements... 1 3.3 Mix Design... 2 3.4 Supplementary Material...

More information

CONSTRUCTION AND PERFORMANCE OF ULTRATHIN ASPHALT FRICTION COURSE

CONSTRUCTION AND PERFORMANCE OF ULTRATHIN ASPHALT FRICTION COURSE NCAT Report No. 97-5 CONSTRUCTION AND PERFORMANCE OF ULTRATHIN ASPHALT FRICTION COURSE by Prithvi S. Kandhal Larry Lockett September 1997 CONSTRUCTION AND PERFORMANCE OF ULTRATHIN ASPHALT FRICTION COURSE

More information

Open-Graded Friction Courses (OGFC)

Open-Graded Friction Courses (OGFC) Open-Graded Friction Courses (OGFC) Course No: C02-058 Credit: 2 PDH Gregory J. Taylor, P.E. Continuing Education and Development, Inc. 9 Greyridge Farm Court Stony Point, NY 10980 P: (877) 322-5800 F:

More information

Florida s Experience with Crumb Rubber

Florida s Experience with Crumb Rubber Florida s Experience with Crumb Rubber Jim Warren Executive Director Asphalt Contractors Association of Florida, Inc. www.floridaridesonus.org Slides Courtesy of FDOT State Materials Office Background

More information

CalMod Design-Build Electrification Services

CalMod Design-Build Electrification Services SECTION 34 32 38 ASPHALT PAVING PART 1 - GENERAL 1.01 DESCRIPTION A. Section includes specifications for hot-mix asphalt concrete (HMAC) track underlayment and asphalt concrete (AC) paving. Track underlayment

More information

Asphalt Rubber The Arizona Experience. Chad Auker, PE Arizona Department of Transportation

Asphalt Rubber The Arizona Experience. Chad Auker, PE Arizona Department of Transportation Asphalt Rubber The Arizona Experience Chad Auker, PE Arizona Department of Transportation 1 Terminology CRA Crumb rubber asphalt (aka asphalt rubber) ARAC Asphalt Rubber Asphaltic Concrete AR-ACFC Asphalt

More information

REPAIR OF SEVERELY DISTRESSED PAVEMENT 10 MINUTES AFTER COMPACTION. Simple, Permanent & Environmentally Friendly

REPAIR OF SEVERELY DISTRESSED PAVEMENT 10 MINUTES AFTER COMPACTION. Simple, Permanent & Environmentally Friendly REPAIR OF SEVERELY DISTRESSED PAVEMENT 10 MINUTES AFTER COMPACTION Simple, Permanent & Environmentally Friendly INTRODUCING PAVEMEND concrete repair products have been acknowledged by professionals for

More information

NOTE: FOR PROJECTS REQUIRING CONTRACTOR MIX DESIGN, THE DESIGN PROCEDURES ARE SPECIFIED IN THE SPECIAL PROVISIONS OF THE CONTRACT.

NOTE: FOR PROJECTS REQUIRING CONTRACTOR MIX DESIGN, THE DESIGN PROCEDURES ARE SPECIFIED IN THE SPECIAL PROVISIONS OF THE CONTRACT. September 1, 2003 CONCRETE MANUAL 5-694.300 MIX DESIGN 5-694.300 NOTE: FOR PROJECTS REQUIRING CONTRACTOR MIX DESIGN, THE DESIGN PROCEDURES ARE SPECIFIED IN THE SPECIAL PROVISIONS OF THE CONTRACT. 5-694.301

More information

ITEM 334 HOT-MIX COLD-LAID ASPHALT CONCRETE PAVEMENT

ITEM 334 HOT-MIX COLD-LAID ASPHALT CONCRETE PAVEMENT ITEM 334 HOT-MIX COLD-LAID ASPHALT CONCRETE PAVEMENT 334.1. Description. Construct a cold-laid pavement layer composed of a compacted mixture of aggregate and asphalt material mixed hot in a mixing plant.

More information

OHIO ASPHALT PAVING CONFERENCE

OHIO ASPHALT PAVING CONFERENCE OHIO ASPHALT PAVING CONFERENCE 38 th Annual Conference Wednesday, 2/6/2013 Fawcett Center Campus of The Ohio State University 2400 Olentangy River Road Columbus, Ohio 43210 REHAB STRATEGIES FOR LOCAL

More information

NZQA registered unit standard version 2 Page 1 of 6

NZQA registered unit standard version 2 Page 1 of 6 Page 1 of 6 Title Operate a self-propelled roller for asphalt surfacing Level 3 Credits 10 Purpose People credited with this unit standard are able to: demonstrate knowledge of asphalt paving compaction

More information

PROPERTIES AND MIX DESIGNATIONS 5-694.200

PROPERTIES AND MIX DESIGNATIONS 5-694.200 September 1, 2003 CONCRETE MANUAL 5-694.200 5-694.210 PROPERTIES OF CONCRETE PROPERTIES AND MIX DESIGNATIONS 5-694.200 Inspectors should familiarize themselves with the most important properties of concrete:

More information

Rutting Based Evaluation of Asphalt Mixes

Rutting Based Evaluation of Asphalt Mixes Pak. J. Engg. & Appl. Sci. Vol., July, 22 (p. 6-65) Rutting Based Evaluation of Asphalt Mixes Kamran Muzaffar Khan, Mumtaz Ahmed Kamal 2. Associate Professor, Civil Engg. Department, University of Engg.

More information

National Center for Asphalt Technology. Pavement Test Track Research Findings

National Center for Asphalt Technology. Pavement Test Track Research Findings National Center for Asphalt Technology Pavement Test Track Research Findings 2000 2010 Overview The NCAT Pavement Test Track, a world-renowned accelerated pavement-testing facility, has been operating

More information

AASHTO Subcomittee on Materials Biloxi, Mississippi August 4-10, 2012 Chris Abadie, P.E.

AASHTO Subcomittee on Materials Biloxi, Mississippi August 4-10, 2012 Chris Abadie, P.E. Louisiana Case Study: Implementation of CRM Binder in PG specification. AASHTO Subcomittee on Materials Biloxi, Mississippi August 4-10, 2012 Chris Abadie, P.E. My Story Background Approach Phase I Evaluation:

More information

The Institute of Asphalt. Marking of Bituminous Mixtures & Aggregate

The Institute of Asphalt. Marking of Bituminous Mixtures & Aggregate The Institute of Asphalt CE Technology Marking of Bituminous Mixtures & Aggregate Dr Reza Shahmohammadi 22 nd Jan 2013 Aggregates BS EN 12620 BS EN 13043 Bituminous Mixes BS EN 13108 BS EN 13108 European

More information

A. Related work in other sections of these Specifications includes but is not limited to:

A. Related work in other sections of these Specifications includes but is not limited to: PART 1 GENERAL 1.01 GENERAL Work includes but is not limited to the following: A. This work shall consist of one or more courses of plant mixed asphalt concrete placed on a prepared foundation or base

More information

Division 2 Section 32 14 13.19 Section 02795

Division 2 Section 32 14 13.19 Section 02795 Note: The text must be edited to suit specific project requirements. It should be reviewed by a qualified civil or geotechnical engineer, or landscape architect familiar with the site conditions. Edit

More information

Final Report The Effect of Voids in Mineral Aggregate (VMA) on Hot Mix Asphalt Pavements

Final Report The Effect of Voids in Mineral Aggregate (VMA) on Hot Mix Asphalt Pavements Final Report 2000-13 The Effect of Voids in Mineral Aggregate (VMA) on Hot Mix Asphalt Pavements 1. Report No. 2. 3. Recipient s Accession No. MN/RC - 2000-13 Technical Report Documentation Page 4. Title

More information

CONSTRUCTION STANDARDS SECTION CS 5 ASPHALT CONCRETE

CONSTRUCTION STANDARDS SECTION CS 5 ASPHALT CONCRETE CONSTRUCTION STANDARDS SECTION CS 5 ASPHALT CONCRETE CS 5-01 GENERAL: Furnishing, spreading and compacting Asphalt Concrete shall be in conformance with Section 39, Asphalt Concrete of the CALTRANS Standard

More information

Compaction Principles and Techniques

Compaction Principles and Techniques Compaction Principles and Techniques What is Compaction? Mechanically increasing the density of a lift of material Increase density by removing air voids Dense mat resists rutting and movement Each layer

More information

Effect of rubber on dynamic creep of asphalt concrete mixtures

Effect of rubber on dynamic creep of asphalt concrete mixtures Effect of rubber on dynamic creep of asphalt concrete mixtures Taisir S. Khedaywi 1 and Jameel M. Al - Mashagbeh 2 1 Prof. of Civil Engineering Philadelphia University, Amman - Jordan, Tel: + 962 2 7242540

More information

CHAPTER 8 ROAD SURFACE PROPERTIES

CHAPTER 8 ROAD SURFACE PROPERTIES CHAPTER 8 ROAD SURFACE PROPERTIES 230 8.1 Introduction: The road user desires a road surface where he can drive safe and comfortable. This requires a pavement structure with enough stiffness, a fast run-off

More information

HIGHWAYS DEPARTMENT GUIDANCE NOTES ON THE USE OF WATERPROOFING MEMBRANES ON CONCRETE BRIDGE DECKS

HIGHWAYS DEPARTMENT GUIDANCE NOTES ON THE USE OF WATERPROOFING MEMBRANES ON CONCRETE BRIDGE DECKS HIGHWAYS DEPARTMENT GUIDANCE NOTES ON THE USE OF WATERPROOFING MEMBRANES ON CONCRETE BRIDGE DECKS Research & Development Division RD/GN/033 June 2008 THE USE OF WATERPROOFING MEMBRANES ON CONCRETE BRIDGE

More information

Design, Construction, and Maintenance of Open-Graded Asphalt Friction Courses

Design, Construction, and Maintenance of Open-Graded Asphalt Friction Courses Information Series 115 NATIONAL ASPHALT PAVEMENT ASSOCIATION Design, Construction, and Maintenance of Open-Graded Asphalt Friction Courses Contact information for NAPA elsewhere in this recently digitized

More information

NATIONAL SCIENCE STANDARDS:

NATIONAL SCIENCE STANDARDS: ASPHALT COOKIES Everyone loves COOKIES! But when you make these delicious chocolate no-bake cookies you also will learn how asphalt is made and used in paving roads. When asphalt is heated it changes from

More information

It should remain foremost in the thinking of the mix designer that the design data consists of two general areas - volumetric and physical.

It should remain foremost in the thinking of the mix designer that the design data consists of two general areas - volumetric and physical. ..2. BITUMINOUS MIX DESIGN (a) Mixtures Containing Asphalt Cement. (1) Scope. This method covers the procedure for determining the optimum amount of asphalt cement in a given aggregate mixture. Since bituminous

More information

Use of Non-Conventional Fillers on Asphalt-Concrete Mixture

Use of Non-Conventional Fillers on Asphalt-Concrete Mixture International Journal of Innovation and Applied Studies ISSN 2028-9324 Vol. 3 No. 4 Aug. 2013, pp. 1101-1109 2013 Innovative Space of Scientific Research Journals http://www.issr-journals.org/ijias/ Use

More information

PERFORMANCE EVALUATION OF E-WASTE IN FLEXIBLE PAVEMENT AN EXPERIMENTAL APPROACH

PERFORMANCE EVALUATION OF E-WASTE IN FLEXIBLE PAVEMENT AN EXPERIMENTAL APPROACH International Journal of Civil, Structural, Environmental and Infrastructure Engineering Research and Development (IJCSEIERD) ISSN 2249-6866 Vol.2, Issue 3, Sep 2012 1-11 TJPRC Pvt. Ltd., PERFORMANCE EVALUATION

More information

SECTION 623 CONCRETE BONDING COMPOUND, EPOXY MORTAR AND EPOXY POLYMER CONCRETE OVERLAY SECTION 623.10 CONCRETE BONDING COMPOUND.

SECTION 623 CONCRETE BONDING COMPOUND, EPOXY MORTAR AND EPOXY POLYMER CONCRETE OVERLAY SECTION 623.10 CONCRETE BONDING COMPOUND. SECTION 623 CONCRETE BONDING COMPOUND, EPOXY MORTAR AND EPOXY POLYMER CONCRETE OVERLAY SECTION 623.10 CONCRETE BONDING COMPOUND. 623.10.1 Description. This work shall consist of preparing the surface,

More information

Chapter 2. Bituminous Design

Chapter 2. Bituminous Design Chapter 2 Bituminous Design Bituminous design consists of selecting the bitumen and aggregate gradation, blending the aggregates to conform to the selected gradation, determining the optimum content, and

More information

Transportation Demographics

Transportation Demographics Transportation Demographics F Roads Marine Highway Airports E = Emulsion Stabilization F = Foamed Asphalt Stabilization C = Portland Cement Stabilization 9/25/2012 Integrity Excellence Respect 2 Integrity

More information

Schedule of Accreditation issued by United Kingdom Accreditation Service 2 Pine Trees, Chertsey Lane, Staines-upon-Thames, TW18 3HR, UK

Schedule of Accreditation issued by United Kingdom Accreditation Service 2 Pine Trees, Chertsey Lane, Staines-upon-Thames, TW18 3HR, UK Laboratory locations: Schedule of Accreditation 2 Pine Trees, Chertsey Lane, Staines-upon-Thames, TW18 3HR, UK Unit 1 Glovers Court Burymead Rd Hitchin Hertfordshire 1RT Contact: Mr J Charlesworth Tel:

More information

Pavement Patching Repair for AC and PCC Pavement Surfaces. Vern Thompson www.crafco.com

Pavement Patching Repair for AC and PCC Pavement Surfaces. Vern Thompson www.crafco.com Pavement Patching Repair for AC and PCC Pavement Surfaces Vern Thompson www.crafco.com Overview and Objective New Methods For Pavement Patching-Overview What are they How they are applied New Methods Secti

More information

L. Huang, A.M. Sha*, F. Ma, Z.Z. Liu and X.L. Zou. Chang an University, China. August 3, 2015

L. Huang, A.M. Sha*, F. Ma, Z.Z. Liu and X.L. Zou. Chang an University, China. August 3, 2015 L. Huang, A.M. Sha*, F. Ma, Z.Z. Liu and X.L. Zou Chang an University, China August 3, 2015 ISSAEST, Fairbanks, AK, USA, August 2-5, 2015 The national or local standards of the asphalt stabilized aggregates

More information

CONTENT Why Revise? EN13108 Terminology Main changes Implementation issues Summary Credit to Bill Greene (NRA) and Alex Lake (FM) 2

CONTENT Why Revise? EN13108 Terminology Main changes Implementation issues Summary Credit to Bill Greene (NRA) and Alex Lake (FM) 2 Manual of Contract Documents for Road Works. Revised Series 900. January 2010 1 CONTENT Why Revise? EN13108 Terminology Main changes Implementation issues Summary Credit to Bill Greene (NRA) and Alex Lake

More information

July 2001 Go to BetterRoads.com

July 2001 Go to BetterRoads.com Page 1 of 5 July 2001 Go to BetterRoads.com Rebuilding by Reclaiming the FDR Process An illustrated guide to the basic full-depth reclamation process Like most road construction technologies, full-depth

More information

APPENDIX B. I. Background Information

APPENDIX B. I. Background Information APPENDIX B GUIDELINES FOR IDENTIFYING AND REPAIRING LOCALIZED AREAS OF DISTRESS IN AC PAVEMENTS PRIOR TO CAPITAL PREVENTIVE MAINTENANCE OR REHABILITATION REPAIRS I. Background Information A. AC Pavement

More information

Section 3 Specification 3.2 Aggregate Production and Stockpiling TABLE OF CONTENTS

Section 3 Specification 3.2 Aggregate Production and Stockpiling TABLE OF CONTENTS TABLE OF CONTENTS 3.2 AGGREGATE PRODUCTION AND STOCKPILING... 1 3.2.1 GENERAL... 1 3.2.2 MATERIALS... 1 3.2.3 PRODUCTION... 1 3.2.3.1 General... 1 3.2.3.2 Quality Control... 3 3.2.3.2.1 General... 3 3.2.3.2.2

More information

INDOT Standard Specifications, Section 402- Hot Mix Asphalt Pavements Part A (Materials and Mix Production)

INDOT Standard Specifications, Section 402- Hot Mix Asphalt Pavements Part A (Materials and Mix Production) GUIDE FOR SPECIFYING ASPHALT PAVEMENTS FOR LOCAL GOVERNMENTS (USING INDOT STANDARD SPECIFICATIONS SECTION 402) This Guide incorporates the latest asphalt pavement technologies. It attempts to present the

More information

NOTES TO THE PERFORMANCE BASED SPECIFICATION FOR HOTMIX ASPHALT WEARING COURSE SURFACING

NOTES TO THE PERFORMANCE BASED SPECIFICATION FOR HOTMIX ASPHALT WEARING COURSE SURFACING TNZ P/23 NOTES: 2005 FOR HOTMIX ASPHALT WEARING COURSE SURFACING 1. BACKGROUND 1.1 Specification Use The specification is to be used where the Engineer requires a dense graded, open graded (permeable)

More information

SECTION 311 PLACEMENT AND CONSTRUCTION OF CEMENT TREATED SUBGRADESOIL CEMENT BASE COURSE

SECTION 311 PLACEMENT AND CONSTRUCTION OF CEMENT TREATED SUBGRADESOIL CEMENT BASE COURSE PLACEMENT AND CONSTRUCTION OF CEMENT TREATED SUBGRADESOIL CEMENT BASE COURSE 311.1 DESCRIPTION: This item shall consist of a cement treated subgrade base course composed of a mixture of local soil, portland

More information

2011 Canadian Asphalt Mix Exchange Program Marshall Mix Design Instructions to Participants

2011 Canadian Asphalt Mix Exchange Program Marshall Mix Design Instructions to Participants Please note that at the November 2005 CAMP technical meeting, it was agreed that only one test method for the Theoretical Maximum Specific Gravity is required. The test method shall follow AASHTO T 209.

More information

Otta Seal BACKGROUND GENERAL DESCRIPTION DESIGN ASPECTS. Category : Technical Information/On-carriageway/

Otta Seal BACKGROUND GENERAL DESCRIPTION DESIGN ASPECTS. Category : Technical Information/On-carriageway/ Otta Seal Category : Technical Information/On-carriageway/ BACKGROUND An Otta seal is a thin bituminous seal comprising graded gravel or crushed aggregate containing all sizes and either a cut-back or

More information

Bulk Density ( Unit Weight ) and Voids in Aggregate

Bulk Density ( Unit Weight ) and Voids in Aggregate Standard Method of Test for Bulk Density ( Unit Weight ) and Voids in Aggregate AASHTO Designation: T 19M/T 19-00 (2004) ASTM Designation: C 29/C 29M-97 (2003) 1. SCOPE 1.1. This test method covers the

More information

Definitions. Pass A pass is defined as the entire roller moving over one point in the mat one time.

Definitions. Pass A pass is defined as the entire roller moving over one point in the mat one time. CHAPTER 5 COMPACTION The compaction process, which must be closely controlled to achieve a quality pavement, is the last chance you will have to make or break a job. The best pavement design, the latest

More information

SEAUPG Annual Meeting Williamsburg, VA Thursday, November 19, 2015

SEAUPG Annual Meeting Williamsburg, VA Thursday, November 19, 2015 LADOTD Balanced Mixture Design Samuel Cooper III, Ph.D., P.E. Southeastern Asphalt User Producer Group November 6 9, 25 Williamsburg, Va. Acknowledgements LTRC Asphalt Research Group Jeremy Icenogle, Patrick

More information

ITEM 247 FLEXIBLE BASE Description. Construct a foundation course composed of flexible base.

ITEM 247 FLEXIBLE BASE Description. Construct a foundation course composed of flexible base. ITEM 247 FLEXIBLE BASE 247.1. Description. Construct a foundation course composed of flexible base. 247.2. Materials. Furnish uncontaminated materials of uniform quality that meet the requirements of the

More information

Pavement Rehabilitation Using Hot Mix Asphalt. - National Perspective -

Pavement Rehabilitation Using Hot Mix Asphalt. - National Perspective - Pavement Rehabilitation Using Hot Mix Asphalt - National Perspective - Rehabilitation Process Evaluate Existing Pavement and Conditions Evaluate Options Construct Project Monitor Performance Evaluate Existing

More information

Effect of Specific Gravity on Aggregate Varies the Weight Of Concrete Cube

Effect of Specific Gravity on Aggregate Varies the Weight Of Concrete Cube Effect of Specific Gravity on Aggregate Varies the Weight Of Concrete Balamurali Arumugam, Senior Lecturer (Civil), ISTE124, Department of Civil Engineering, LathaMathavan Polytechnic College, Alagarkovil,

More information

2009 County Engineer s Workshop. Asphalt Pavement Association Of Michigan

2009 County Engineer s Workshop. Asphalt Pavement Association Of Michigan 2009 County Engineer s Workshop Charles E. Mills, P.E., Director of Engineering 2937 Atrium Drive, Suite 202 Okemos, MI 48864 517-323 323-7800 www.apa-mi.org HMA Ultra-Thin: Extends Pavement Service Life

More information

1.5 Concrete (Part I)

1.5 Concrete (Part I) 1.5 Concrete (Part I) This section covers the following topics. Constituents of Concrete Properties of Hardened Concrete (Part I) 1.5.1 Constituents of Concrete Introduction Concrete is a composite material

More information

Factors that Affect the Voids in the Mineral Aggregate of Hot-Mix Asphalt

Factors that Affect the Voids in the Mineral Aggregate of Hot-Mix Asphalt TRANSPORTATION RESEARCH RECORD 1469 Factors that Affect the Voids in the Mineral Aggregate of Hot-Mix Asphalt TIM ASCHENBRENER AND CHARLES MACKEAN To determine the maximum density line that would best

More information