POLY-CARBOXYLATE SUPERPLASTICIZER
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1. ApplicationPoly-Carboxylate is a superplasticizer for high performance concrete, high strength concrete, high volume fly ash/slag concrete and grouting/self-leveling screed/mortar.
2. Characterstic
1) High early strength: Significant increase of early strength and 28d strength.
2) Low slump lose: Great reduction of slump lose.
3) Excellent durability: Reduction of cracking , shrinkage and creep.
4) High water reduction: Water reduction more than 25% according to different application.
5) Environmental friendly products: Non pollution during production.
3.Technology
Poly-carboxylate-based water reducer is a kind of superplasticizer emerged in the early 80' s. It is mainly used in cement concrete. In chemistry, Poly-carboxylate-based is an organic and polymeric electrolyte. It belongs to a polymer surfactant. Therefore, it can also be applied in other paste materials such as gypsum products and ceramic products to reduce water content.
Poly-carboxylate is a weak electrolyte. It can only be fully dissolved in an alkaline solution .It can compound with cations in cement/water system to control the cement hydration process and thus to reduce the slump loss of the concrete. Poly-carboxylate achieves its water reducing effect through the yield of electrostatic repulsion and steric hindrance when it is absorbed to the cement particles. Hence, Poly-carboxylate is the most effective superplasticizer for cement concrete.
Poly-carboxylate is a raw material for superplasticizer. It is recommended that applicants should determine the Poly-carboxylate dosage in their own formulation according to their trial runs.
4. Specification
The specification of Poly-carboxylate is listed as follows.
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Items |
Specification |
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OS-L 40% liquid |
OS-P 98% powder Concrete building materials |
OS-A 98% powder |
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Visual Appearance |
Pale Bown Viscous Liquid |
Light Yellow Powder |
Light Yellow Powder |
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Density(23℃) |
1.12±0.2 |
51 0 ± 10 ㎏ /m 3 |
51 0 ± 30 ㎏ /m 3 |
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PH (23℃ ) |
9.0±0.5 |
(20% water solution)9.0±0.5 |
(20% water solution)9.0±0.5 |
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Solid Content ( % ) |
40±2.0 |
98. 0 ± 1.0 |
98. 0 ± 1.0 |
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Stability(0℃,24 hours) |
No Crystallization |
Stable |
Stable |
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Cl -( % ) |
≤ 0.10 |
≤ 0.20 |
≤ 0.10 |
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Na 2 SO 4( % ) |
≤ 4.0 |
≤ 15.0 |
≤ 4.0 |
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Na 2 O+0.658K 2 O(%) |
≤ 5.0 |
≤ 5.0 |
≤ 4.0 |
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Viscosity |
11 ± 2 |
11 ± 2 |
11 ± 2 |
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Solubility |
Very Soluble |
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Performance |
Dosages for P.O 42.5 Standard Cement:(wt% of cement) |
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0.50±0.05 |
0.20±0.02 |
0.20±0.02 |
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Cement Paste Flow(mm) |
≥ 240 |
≥ 200 |
≥ 240 |
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Water Reducing Of Mortar |
≥ 20 |
≥ 18 |
≥ 20 |
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The Performance of OS-L ,OS-P grade used in the concrete is as follows.Test items accords with China GB Standard. The following test standards are applied with dosages for P.O 42.5 Standard Cement:(wt% of cement),OS-P grade is dissolved into 20% water solution.The dosage is 1% (with cement volume), equivalent to the 2.0% in powder products dosages .
OS-L ,OS-P (20% water solution) Dosage (% of Cem)
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Test Items |
Unit |
Specification |
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Water Reduction Rate |
% |
≥25 |
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Compressive |
1d |
% |
≥170 |
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3d |
≥160 |
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7d |
≥150 |
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28d |
≥130 |
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Air Content |
% |
≤6.0 |
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Bleeding Ratio |
% |
≤60 |
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Shrinkage (28d) |
% |
≤100 |
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Setting Time Deff |
Ini. |
min |
-90 ~ +120 |
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Fin. |
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CL Penetration |
coulomb |
≤2000 |
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F/T Cycles |
Time |
≥300 |
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Slump Retention (60min) |
mm |
≥150 |
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5.Dosage:
Different solid contents have different dosages in the cement,please check it as follows.
1)OS-L (40%) : 0.4-0.6
2)OS-P (98%):0.2-0.25%
3)OS-A (98%):0.2-0.3%
6.Application Method
1) Poly-carboxylate is used to produce high performance, high strength and flowable concrete.
2) Dosage of Poly-carboxylate is determined according to the designated concrete mix through trial mixing.
3) Poly-carboxylate is dosed either together with water or after the addition of water. It shows more effective when Poly-carboxylate is dosed after the addition of water.
7．Packing
Liquid :200kg/drum or IBC drum
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