PICP Construction. Why PICPs The Big Picture. Key things to know about PICPs

Transcription

1 PICP Construction Permeable Interlocking Concrete Pavement Presenter: Frank Gandora, President Creative Hardscape Why PICPs The Big Picture Germany was first to develop PICPs 2005 Clean Water Act Federal Law U.S. National Pollutant Discharge Elimination System (NPDES) Storm Water Runoff is Primary source of pollutants. PICPs provide First stage filtration and Ground Water recharge. EPA is convinced that PICPs work! 2 Key things to know about PICPs PICPs meet or beat EPA and State regulations BMP Best Management Practice LID Low Impact Development PICPs eliminate ugly space consuming retention/detention ponds LEED Leadership in Energy & Environmental Design 3 1

2 PICP Design Basics 4 Three types of PICP Systems Full Exfiltration: Directs water to soil below Partial Exfiltration: Excess water directed to sewer or stream via outfall pipes. No Exfiltration: Required when soil has low permeability, or other site limitations. Basically a detention pond with an outlet. 5 Permeable Pavers Meet ASTM C 936 Meet ADA guidelines LEED Potential Many different shapes, colors, sizes to choose from. All the same advantages of Interlocking Concrete Pavers...and more. 6 2

3 Enjoy year round construction 7 The PICP System 8 Aggregate Gradations The Key to PICP Sub Base ASTM No. 2 Base ASTM No. 57 Bedding/Joints ASTM No

4 Equipment needed for PICP projects Track or Articulating loader Plate Compactor (13,000 lb/60 kn)or a 10 ton Roller for the Base and Sub base materials Larger Projects could use bucket screeds pulled with equipment or mechanical screeds to accelerate the screeding process Larger project use Mechanical Paver Installers 10 Loader and Plate ton Vibratory Roller 12 4

5 Mechanical Installation 13 Or, just install PICPs by hand 14 Installation Tips KEEP YOUR JOBSITE CLEAN So, what does that mean 15 5

6 Excavation as sediment trap Excavation & subbase installation separated by several days or weeks Excavate all but 6 in. (150 mm) Direct runoff, settle out sediment, drain out Construction resumes: excavate sediment & soil Section 3 16 Don t store on soil Good housekeeping Section 3 17 PICP Entrances to the project site. Dense graded base ramp over an open graded PICP base Section

7 Job Planning and material placement Dumping the near end first: avoid truck tires compacting the soil. Back drag teeth on bucket to loosen compacted soils. 19 Minimize Sediment Transport Keeping sediment away from the pavers Section 3 20 Stormwater pollut prevention Plan (SWPPP) Section

8 Edge Restraints for PICPs Commercial Vehicular Cast in place concrete Precast concrete Cut Stone Pedestrian & Residential Driveways All of the above Compacted base at perimeter with spiked edging 22 Residential driveway with DGA sides 23 Dense graded edge beam 24 8

9 Edge base contains bedding Section 6 25 Toweled Concrete Edge Restraint on Sidewalk Driveway Section 6 26 Compacting Aggregates.use water 27 9

10 Check your grades Not your School grades 28 Screed setting bed. Approx. ¾ to 1 inch higher than F.G. 29 Bigger screeds for speed 30 10

11 Snap Lines and begin Paver Installation Dense graded base along edges No. 8 stone Section 6 31 Initial layout same start as regular pavers Section 6 32 Mechanical or Hand Installation? 33 11

12 Depends on the project 34 Alignment Section 6 35 Compaction Section

13 Fill the joint openings A blower is very helpful too. Section 6 37 Final Jointing and Compaction Expect up to 3/4 in. (20 mm) downward movement during compaction Goal set pavers above final elevation 1/4 to 3/8 in. of drain & gutter inlets; or 1/8 to 1/4 in. for pedestrian/ada compliance Fill joints, sweep surface clean, compact Consider: compact before filling joints, replace cracked pavers (can t quickly remove after compaction with full joints) 60, 80 and 100 mm thick pavers: 5,000 lbf (22kN) 120 mm thick: 6,800 lbf (30 kn) Fill up joints with stone as needed, but NOT to top Fill to chamfer bottom Joints full, pavers compacted within 6 ft (2 m) of laying face at the end of each day 38 Joints filled collect a check Section

14 Maintenance 2 yrs residential street OR Remove weeds by hand most effective 7-8 yrs container storage NY New construction MN Section 9 40 When do you maintain? Inspect a couple of times a year. Then base cleaning on sediment loading Vacuum sweep 1 2x annually Don t use water to clean Extent of clogging? Check surface infiltration ASTM C1701 Do not power wash Seriously, power washing will drive sediment deeper into the joints. 41 Sweeper Effectiveness Least effective Regenerative air vacuum sweeper Use 1 2 times/year Most effective True vacuum sweeper Very powerful Restores highly clogged surfaces Sectio n 9 14

15 Winter Maintenance Snow melts faster lower risk of ice Surface does not heave when frozen Use normal plows dirty snow piles clog surface Deicing salts okay Sand can clog system use jointing material for traction Rubber blade NOT needed Section 9 43 Managing dirty snow Section 9 10 yrs street winter sand accumulation Massachusetts 44 A slide with no useful information at all Just filling in the gap between the last slide and the next one (which will be along in just a moment). No need to write this down, unless you feel compelled to do so. Nothing on this slide has to do with PICP construction. In fact I m not really sure why I bothered with it

16 Time for a Good Cigar [email protected] Thank You