- Tangshan Polar Bear Building Materials Co., Ltd
-
Huzhou, Zhejiang, China
- Main products: csa cement, csa expansive agent, rapid hardening cement, rapid set cement, self leveling compounds, water proof, cement additives, concrete additives
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csa expansive agent
US$ 280 - 280
/ Bag
1 Bag(Min. Order)
- T/T L/C D/P D/A
- 7 days
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Product Details
| Brand Name | Polar Bear | Place of Origin | China | |
| Model Number | denka csa #20 |
Product Description
High-efficiency CSA Expansive Agent is being used in all sections of the construction fields and by a wide variety of concrete products manufacturers.
High-efficiency CSA Expansive Agent is manufactured under a strict quality assurance systems GB/T 19001-2000 (i.e. ISO9001:2000) and GB/T 24001-1996 (i.e. ISO 14001:1996)) which accommodates the technical requirements of building chemistry formulators.
The properties of High-efficiency CSA Expansive Agent conform to the standards of the manufacturer and to the Chinese relevant standards.
Characteristics of High-efficiency CSA Expansive Agent
● Low alkalinity.
● High-efficiency CSA Expansive Agent has a very low alkali content (R2O<0.3%) which is beneficial to avoid AAR in concrete.
● Short stable stage of expansion. The stable stage of expansion is not more than 14 days, thus the ultimate strength of concrete is not affected.
● Low dosage and high expansion capacity. The normal dosage of High-efficiency CSA Expansive Agent is 6~8% by the weight of ordinary cement, which is lower compared with other expansive additives such as UEA and CEA (their dosages are about 10~12% by the weight of cement) in the market.
Features by using High-efficiency CSA Expansive Agent
● Prevents cracking due to drying shrinkage and hydration heats.
●Increases the water tightness of concrete and thus is useful for waterproofing buildings.
●Enables the manufacture of high strength concrete products through chemical prestressing.
Chemical Analysis Main constituents (%)
SiO2 4~7
Al2O3 8~12
Fe2O3 <1.5
CaO50~55
MgO 2~4
SO3 22~25
f-CaO 10~15
R2O <0.3
Cl- <0.05
Ig-loss <5
Mineral Composition: CaO, CaSO4, 3CaO·3Al2O3 ·CaSO4.
Specific Surface Area: 200~400 m2/kg.
Specific Gravity: 2.8~3.0
Physical Properties The restrained expansion rate tested under standard condition:
Dosage in OPC (%) 7%
Restrained-expansion rate (%)
TypeⅠ:
Curing 7d in water 0.050-0.080; Curing 7d in water then 21d in air: ≥0
TypeⅡ:
Curing 7d in water:0.025-0.045; Curing 7d in water then 21d in air: ≥-0.015
Directions for Use
1. Dosage
High-efficiency CSA Expansive Agent is used as a part of cement, its proportion to ordinary Portland cement depends upon the intended use and the degree of restraint. The proportion of High-efficiency CSA Expansive Agent to ordinary cement generally used in China is about 6~8%.
2. Mixing
High-efficiency CSA Expansive Agent and ordinary cement must be thoroughly and uniformly mixed in a mechanical mixer with aggregate and water for a slightly longer time than normal concrete.
3. Curing
To ensure the proper development of the ettringite needle crystals which are important in preventing shrinkage cracks which occur during drying period, it is recommended that water be sprayed or membrane curing onto the concrete surface for curing at least 14 days after the concrete is cast.
4. Storage
High-efficiency CSA Expansive Agent is more sensitive to water and moisture than other cementitious material and is therefore packed in completely waterproof bags and should always be kept and stored in a dry place.
Contact Us
- Tangshan Polar Bear Building Materials Co., Ltd
- Contact namesimon mu Chat Now
- Phone86-10-60557308
- Address, Huzhou, Zhejiang
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