POLY-CARBOXYLATE SUPERPLASTICIZER

POLY-CARBOXYLATE SUPERPLASTICIZER  

1. Application  

Poly-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. 

Items 

Specification 

OS-L  40% liquid

OS-P 98% powder Concrete building materials

OS-A 98% powder

Dry building materials

Visual Appearance 

Pale Bown Viscous Liquid

Light Yellow Powder 

Light Yellow Powder 

Density(23℃) 

1.12±0.2

51 0 ± 10 ㎏ /m 3 

51 0 ± 30 ㎏ /m 3 

PH （23℃ ） 

9.0±0.5

（20% water solution）9.0±0.5

（20% water solution）9.0±0.5

Solid Content （ % ） 

40±2.0

98. 0 ± 1.0 

98. 0 ± 1.0 

Stability（0℃,24 hours） 

No Crystallization

Stable

Stable

Cl -（ % ） 

≤ 0.10 

≤ 0.20 

≤ 0.10 

Na 2 SO 4（ % ） 

≤ 4.0 

≤ 15.0 

≤ 4.0 

Na 2 O+0.658K 2 O（%） 

≤ 5.0 

≤ 5.0 

≤ 4.0 

Viscosity 

11 ± 2 

11 ± 2 

11 ± 2 

Solubility 

Very Soluble 

Performance

Dosages for P.O 42.5 Standard Cement:(wt% of cement)

0.50±0.05

0.20±0.02

0.20±0.02

Cement Paste Flow(mm)

≥ 240

≥ 200 

≥ 240

Water Reducing Of Mortar

≥ 20

≥ 18 

≥ 20

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 .

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OS-L ,OS-P (20% water solution) Dosage (% of Cem)

Test Items 

Unit

Specification

Water Reduction Rate

%

≥25

Compressive

Strength Ratio

1d

%

≥170

3d

≥160

7d

≥150

28d

≥130

Air Content

%

≤6.0

Bleeding  Ratio

%

≤60

Shrinkage (28d)

%

≤100

Setting Time Deff

Ini.

min

-90 ~ +120

Fin.

CL Penetration

coulomb

≤2000

F/T Cycles

Time

≥300

Slump Retention (60min)

mm

≥150

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 

Powder:  25kg/bag or 25kg/drum