Dyckerhoff MIKRODUR. from the finest. MIKRODUR Grade X. Dyckerhoff Rapid Hardening Cement CEM I 52,5 R. d 95

Size: px

Start display at page:

Download "Dyckerhoff MIKRODUR. from the finest. MIKRODUR Grade X. Dyckerhoff Rapid Hardening Cement CEM I 52,5 R. d 95"

Loraine Richardson
7 years ago
Views:

1 from the finest MIKRODUR Grade X Dyckerhoff Rapid Hardening Cement CEM I 52,5 R

2 2 In Action Worldwide Algeria Sahara Region Oil well cement slurries with MIKRODUR R-U Russia Moscow, Basilius Cathedral Masonry Repair with MIKRODUR R-X Early strength optimization of oil well cement slurries with low densities. Grouting of medieval masonry to increase watertightness and stability. USA Florida, Cape Canaveral Grouting with MIKRODUR R-U/E plus Improvement of bonding between base slab and foundation in the liftoff area of the Space shuttle at Kennedy Space Center.

3 Microfine cements in action worldwide 3 Germany Magdeburg, Brücke des Friedens Concrete Repair with MIKRODUR R-U Improvement of structural strength and load-carrying capacity through grouting and underpinning of the bridge piers. Turkey Muratlin, Hydroelectric Power Plant Ridge-Slot Grouting with MIKRODUR R-F/Eplus Hose-Injection for rigid slot refilling between tunnel shell and rock. Germany Berlin, Brandenburger Tor Underpinning with MIKRODUR R-U Extension of column foundation to prevent structure settlement through the building of a new subway tube.

4 4 Description microfine cements are produced according to a patented production process (European Patent ). The main components, blast furnace slag and Portland cement clinker, are separately grinded and classified to the requested grade. These fractions are blended with selected gypsum to a regulated setting according to fixed formulas in a batch mixer into. This process guarantees the unique, consistent quality of MIKRODUR microfine cements. According to the European Standard EN 12715: 2000 Grouting microfine cements are characterized through a steep, uniform grain size distribution. The maximum grain size-value may not exceed 20 µm. The specification of the specific surface area (Blaine) isn t significant for microfine cement as it gives no information about the maximum grain size, which is the key parameter for groutability. Scanning Electron Microscope (SEM)-Shots (1000 x) Left Figure: Common blend of standard cement with ultrafine filler Right Figure: MIKRODUR Grade F The specific surface area according to Blaine of both products is app m 2 /kg Passing the sieve [%] MIKRODUR, Grade X = 5,2 µm Dyckerhoff Rapid Hardening Cement CEM I 52,5 R = 31 µm Grain size [µm] The limitation of the maximum grain size distinguishes microfine cements from standard cements. The - value is essential for the choice of suitable cements for the following applications: a) Grouting of soils with consideration of the grain size distribution of the soil. b) Grouting into rock and concrete with consideration of the crack-size. c) Optimization of the grain size distribution of standard cements, mortars or well cements to improve their performance characteristics. d) Squeeze cementing to seal leakages in gas and oil wells. Grain size distribution of MIKRODUR Grade X and rapid hardening cement CEM I 52,5 R

5 Description / Applications 5 Applications Microfine cements are mainly used for stabilization and/or waterproofing of soils where standard cements are not applicable due to their grain size. Microfine cements have significantly extended the range of soils being groutable with cements. Nowadays, soils with 80% of fine sand are groutable with suitable microfine cements. Furthermore, microfine cements are used 1 for waterproofing and stabilization of rock in tunnelling 1 for repair of concrete or mortar 1 as a component for high performance concrete as a substitute for microsilica. 1 for remedial cementing of oil and gas wells 1 to improve the early strength of light weight oil well cement slurries. Rock Grouting Squeeze cementing in the oil field Concrete- and Masonry Repair on human hair (SEM-shot) Limitations for the application of different grouting materials in soils. Passing the sieve [%] Silt Sand Gravel Stones fine medium coarse fine medium coarse fine medium coarse Sodium Silicate Microfine Cement 60 Resin 3 7 Cement + Bentonite Cement 30 Mortar ,002 0,006 0,02 0,06 0,2 0,6 2,0 6, Grain size [mm]

6 6 Product Range For more than 15 years Dyckerhoff has provided under the brand name MIKRODUR application-oriented microfine cements: a) MIKRODUR P based on Portland cement clinker providing fast strength development b) MIKRODUR R based on granulated blast furnace slag providing high sulphate resistance and high final strength. c) MIKRODUR R/E plus based on granulated blast furnace slag providing high sulphate resistance and moderate final strength. MIKRODUR is standardly available in the following grades Grade F (Fine) U (Ultrafine) X (Extrafine) 16 µm 9,5 µm 6 µm MIKRODUR P p p MIKRODUR R p p p MIKRODUR R-E/plus p p p MIKRODUR rock p p p Available Products is produced with reduced content of soluble chromium (VI) according to 2003/ 53/ EC. does not contain harmful substances for groundwater (certificates are available) has been tested with admixtures of different producers. The shelf life of, when dry stored and originally packed, is minimum 6 months. Material safety data sheets of Dyckerhoff MIKRODUR inform about safety precautions during handling. Runout Time (Marsh funnel) (sec/dm 3 ) MIKRODUR R-F rock MIKRODUR R-F Shear Strength (kpa) Properties of can pointedly adapt to special requirements for the job-site, for example MIKRODUR R-F rock for grouting into rock at low temperatures Time (h) Grout properties of MIKRODUR R-F and MIKRODUR R-F rock Grout design: Water / MIKRODUR 1:1 Temperature 10 C/50 F

7 Product Range / Packaging / Customer Services 7 Packaging is available in 1 25 kg bags (3 layer paper bags with PE-coating) 1 1 mt jumbo bags 1 Silo truck (Germany and neighbouring countries only) You will find further technical information about or other grouting binders like MAKRODUR in our product leaflets. Contact us! R&D center Wilhelm Dyckerhoff Institut Installation for sand column test Grouting tests at the job-site Customer Services Dyckerhoff provides technical support before, during and after the application of microfine cement. Therefore, our R&D Service Center in Wiesbaden is equipped to carry out several physical, chemical and engineering analysis. Here is a short extract from our service program: 1 Estimation of groutability of soil 1 Formulation of grout 1 Grouting test with sand columns 1 Support of grouting tests on site 1 Chemical and physical analysis 1 Microscopy This bulletin contains general information only. It cannot consider chemical and/or physical influences of substances unknown to us having any contact with our products at mixing or in any other way at work on the construction site. Hence the information is perhaps not suitable for the actual application. In this case individual tests considering the actual on-site conditions are necessary. The information in this bulletin cannot be seen as a quality guarantee. Indemnification and quality claims due to the information in this bulletin are excluded in general. Court of jurisdiction: Wiesbaden, Fed. Rep. Of Germany.

8 Contact: Dyckerhoff AG P.O.Box Wiesbaden Germany Phone: Fax: Mail: Web: DESIGN: wellkom. Kommunikationsdesign GmbH Stand: 11/05

FACT SHEET: HYDRATED LIME FOR MASONRY PURPOSES

FACT SHEET: HYDRATED LIME FOR MASONRY PURPOSES Hydrated Masons Lime Characteristics Type S (Special) hydrated lime is a fine, white, high purity product which has been specially hydrated for convenient,