Polycarboxylate Type TypeAdditives

           1.Products Name: PCA®(I) CONCRETE SUPERPLASTICIZER

Description:

PCA®(I) concrete superplasticizer is a polycarboxylate polymer-based composite admixture. It is a liquid which has the performances of high range water reduction, excellent slump retention and strengthening. It is specially suitable to the production of high-durability concrete, self-compacting concrete, high-compressive-strength concrete, and high workability concrete. PCA (I) superplasticizer is formulated to comply with the following specification for concrete admixture: ASTM494, Type F; BS EN934:2/3.2.3.

　

Features and Benefits:

1. High range water reduction: Tested according to ASTM494, the water reduction rate can be up to 35% at high dosage rates.
2. High compressive strengths: It can improve the compressive strengths of concrete by 60-100% at the age of 3 days, 60-90% at the age of 28 days and 30-50% at the age of 90 days.
3. High slump retention: Almost no slump loss of the concrete within 2 hours.
4. Excellent workability: No bleeding or segregation, no bleeding mark or obvious bubble defect on the concrete surface.
5. Low alkali content: alkali content is less than 1.8%
6. No chloride ions and non-corrosion to steel bar
7. High durability: It effectively improves the frost resistance and carbonation resistance of the concrete. It can decreases drying shrinkage of the concrete by 20% or more compared to naphthalene-based admixture.
8. Dosage: The addition rate of PCA^®(I) normally is 0.6~1.2% by weight of cementitious materials, and can be increased to 1.3~1.8% for ultra-high strength and durability concrete.

　

Usage:

Don’t mix with naphthalene-based admixture. If other admixtures, such as retarding or corrosion-inhibiting admixture, are required simultaneously for some special projects, compatibility tests should be conducted beforehand.

　

After-sale Service:

To ensure desired concrete performances, we offer technical consulting service on the design of concrete mix proportion and experiment on optimization of mix proportion. Our technical personnel will provide on-site directing service free of charge.

　

Packaging:

PCA  (I) is normally packaged 220Kg per barrel.

　

Other Info:

Mixing
PCA^®(I) is a liquid admixture to be added to the concrete during the mixing process. Optimum plasticizing effect and thus water reduction is achieved if
PCA^®(I) is added immediately after 50 -80% of the water. Avoid adding PCA^®(I) to dry aggregate or cement.


Compatibility
PCA^®(I) can be used in combination with the following admixtures and additives
1. Air entraining admixtures to optimize freeze/thaw durability
2. Silica Fume for higher density
3. Shrinkage compensating admixtures
4. Synthetic and Steel Fibres
5. Concrete Improvers
PCA^®(I) is not compatible with the traditional hyperplasticisers with a naphthalene sulphonate or melamine sulphonate base condensed with formaldehyde.

Physical Properties  

Item	Specification
Appearance	Light yellowish viscous liquid
Solid content/wt.%	21.0±1
Density ; 20ºC	1.07±0.05
pH value	7±1
Chloride content/%	Below 0.01
Dosage(%),20% based	0.6～1.8

Fields of Application

1. Concrete with less water content than with conventional admixtures
2. Faster mixing logistics during large jobs
3. High flowability concrete
4. Highly durable concrete
5. Ready-mixed concrete
6. Long distance transport
7. Pumped concrete
8. Hot weather concreting

Health and Safety
PCA^® (I) does not contain any hazardous substances needed to be labeled.
However, it is recommended to use standard handling procedures with the product. Wear gloves and eye protection and wash splashes to the skin with soap and water at the end of shifts or at breaks.

2.Products Name: PCA®(IV) High-range Superplasticizer

Description:

PCA^®(IV) is a new generation superplasticizer based on modified Polycarboxylic ether. It provides maximal water reduction, increased early strength, and improved finishing characteristics. PCA^®(IV) does not contain formaldehyde, calcium chloride or any other intentionally added chlorides and will not initiate or promote the corrosion of steel present in the concrete. It is formulated to comply with the following specification for concrete admixture: ASTM494, Type F; BS EN934:2/3.2.3.

　

Features and Benefits:

1. High range water reduction:  PCA^®(IV) can be dosed in small amounts to obtain water reduction from 15 to 30%, and will achieve water reduction up to 45% at high dosage rates.
2. High Plasticity: The superplasticizing action of PCA^®(IV)provides high-slump, flowing concrete that maintains excellent workability and may be placed with minimal vibration even at very low water cement ratio’s as low as 0.25.
3. High compressive strengths: Increases the compressive strengths of concrete by 50-120% at the age of 3 days, 80% at the age of 28 days and 30-50% at the age of 90 days.
4. High durability: Effectively improves the frost resistance and carbonation resistance of the concrete. Lower drying shrinkage of the concrete by 20% or more compared to naphthalene-based admixture.
5. High compatibility: Compatible with a far greater range of cement types and mineral admixtures. Particularly fit for the preparation of high durability concrete and self-compacting concrete with fly ash and ground slag.
6. Good concrete appearance: Improves surface appearance of concrete obviously.
7. Dosage: The addition rate of PCA^®(IV) is normally 0.5~0.7% by weight of cementitious materials, and can be increased up to 0.9% if more water reduction or slump retention is required.

　

After-sale Service:

To ensure desired concrete performances, we offer technical consulting service on the design of concrete mix proportion and experiment on optimization of mix proportion. Our technical personnel will provide on-site directing service free of charge.

　

Packaging:

PCA®(IV) is normally packaged 220Kg per barrel.

　

Other Info:

Mixing
PCA®(IV) is a liquid admixture to be added to the concrete during the mixing process. Optimum plasticizing effect and thus water reduction is achieved if
PCA®(IV) is added immediately after 50 -80% of the water. Avoid adding PCA®(IV) to dry aggregate or cement.

Compatibility
PCA®(IV) can be used in combination with the following admixtures and additives
1. Air entraining admixtures to optimize freeze/thaw durability
2. Silica Fume for higher density
3. Shrinkage compensating admixtures
4. Synthetic and Steel Fibres
5. Concrete Improvers
PCA®(IV) is not compatible with the traditional hyperplasticisers with a naphthalene sulphonate or melamine sulphonate base condensed with formaldehyde.

Physical Properties
　

Item	Specification
Appearance	Light yellowish viscous liquid
Solid content/wt.%	40±1
Density ; 20ºC	1.10±0.02
pH value	7±1
Chloride content/%	Below 0.01
Dosage(%),20% based	0.6~3.0

Storage
PCA®(IV) should be stored between +5ºC and +50ºC. In case the product freezes, increase the temperature of the product to 30 ºC and remix.
If stored in the original unopened containers PCA®(IV) has a shelf life of 12 months. Avoid frost and direct sunshine.

Health and Safety
PCA®(IV) does not contain any hazardous substances needed to be labeled.
However, it is recommended to use standard handling procedures with the product. Wear gloves and eye protection and wash splashes to the skin with soap and water at the end of shifts or at breaks.