Polycarboxylic Based Concrete Superplasticizer

Polycarboxylic Based Concrete Superplasticizer

KR PCA 60 is polycarboxylic based high array waterreducing hyper plasticizer. It may be added to the job site or at the ready mix concrete plant. No chlorides are utilized in its formulation: as a result it is recommended for prestressed concrete, self compacting concrete and for high strength need. Owing to its high water reduction property making concrete very dense and watertight concrete and no require to utilization separate water proofing agent. Each material should be mixed to the concrete separately.

PRIMARY APPLICATION

FEATURES/BENEFITS

SPECIFICATIONS/COMPLIANCE
Complies with the requirements of ASTM C-494, Type G admixtures. Confirming to IS 9103.

PACKAGING
KR PCA 60 is packaged  in 250 kg drums and 100 kg Drums.

Shelf life: 1 year in original, unopened packages. 

Rate of Slump Loss
Concrete treated with KR PCA 60 retains its plastic consistency for 30 to 60 minutes after dosing depending on the initial/final slumps and dosage rates. KR PCA 60 can be added at the ready mix plant or at the job site from field dispensers. Use KR PCA 60 When placing concrete in hot weather >35 C.
Typical Slump Loss at 70 F (21 C)

Flow Test:-

Appearance
KR PCA 60 is a light brown, free flowing liquid When added to concrete, does not Change theocrats natural appearance.

DIRECTIONS FOR USE
KR PCA 60 add to the sand and water .it should not come into contact with dry cement.

High strength Concrete
Dosage: KR PCA 60 reduces 32%- 35% water reduction. Add all concrete materials in the proper order into the mixer with about 70% of the mixing water and mix 1-2 minutes. Add additional water carefully to obtain the required slump and mix for two  min (Use KR PCA 60  at the rate of 0.4 -1.2%by weight  of cement and at extremely high temperature dosages can be increase up to 2.0%. even with low water/cement ratio.
             
Placeable Concrete 
Add all concrete material in the proper Order into the mixer and mix 2-3 minutes for to get required slump. Add KR PCA 60  and mix an additional One minute.

Flow able concrete
Add all concrete material in the proper Order into the mixer and mix 2-3minutes. Add KR PCA 60 and mix an additional two minutes. For flow able concrete and high slump concrete dosage can be use up to 1.2% -1.5% by weight of cement.  Placement Concrete treated with KR PCA 60 may be placed in the fashion as conventional concrete. Forms for walls or narrow sections must be water tight, strong and have good bracing. During the flowing period ",when the concrete is at a slump of 7" to 9" (180- 220 mm)the concrete will exert a higher  pressure at the base of the form then conventional concrete .formwork for slabs is the same as for conventional concrete.
Curing &sealing proper curing procedures are important to ensure the durability and quality of concrete .to prevent surface cracking cure flatwork with a high solids curing compound.

CLEAN -UP
Clean tools and equipment with water before the material hardens

CHEMICAL  SPECIFICATION/LIMITS

PRECAUTIONS /LIMITATIONS
Care should be taken to maintain KR PCA 60 above freezing, however, freezing and subsequent thawing will not harm the material if  Thoroughly agitated. Never agitate with air or an air lance. Test batches/mix designs /sample slabs may be required due to variations in local cement and aggregates.

Keep concrete from freezing until a minimum strength of 7MPa is reached.    
KR PCA 60 is used in many different mix designs. The engineering or Technical services Departments of the KRWP Company should be consulted whenever a question on usage or capability with other admixtures is raised. Many successful mix designs are on file and can be an excellent reference when preparing a project mix design.
Add to mix independent of other admixtures.