There are 23 CSA Expansive agent from 4 suppliers on EC21.com
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Introduction
General characteristics
High-efficiency CSA expansive agent is obtained by blending suitable natural anhydrite with a specially manufactured clinker which consists essentially of calcium sulphoaluminate and CaO. CSA expansive agent is always mixed with ordinary cement. When mixed in the proper proportions with ordinary cement and hydrated, cement mortar or concrete expands during the early stages of hydration. This expansion, when restrained, makes it possible to minimize drying shrinkage. Moreover, when the ratio of shrinkage reducing admixture to ordinary cement is increased its high expansion qualities make it ideal for use in prestressed concrete.
High-efficiency shrinkage reducing admixture 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 CSA expansive agent conform to the standards of the manufacturer and to the Chinese relevant standards.
Properties
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 (%)
Item | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | SO3 | CaO | R2O | Cl- | Lg-loss |
Usual Range | 4-7 | 8-12 | <1.5 | 50-55 | 2-4 | 22-25 | 10-15 | <0.3 | <0.05 | <5 |
Dosage in OPC (%) | Restrained-expansion rate (%) | |
Curing 7d in water | Curing 7d in water then 21d in air | |
Type I, 7 | 0.050-0.080 | ≥ 0 |
Type II, 7 | 0.025-0.045 | ≥ -0.015 |
Type II, 10 | 0.055-0.080 | ≥ 0 |
Dosage(%) | Compressive Strength (Mpa) | |
7 days | 28 days | |
7 | > 40.0 | > 54.0 |
0 | 37.0 | 56.5 |
Registration Date | 2009/03/15(Year/Month/Date) |
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Buyer / Seller in EC21 | Seller |
Business Type | Manufacturer |
Year established | 1989 |
Employees total | 501 - 1000 |
Annual revenue | USD 10,000,001 - 50,000,000 |
Company | Tangshan Polar Bear Building Materials Co.,Ltd. |
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Address | Yujing East RoadBeijingBeijing101100China |
Phone | 86 - 0 - 15810326158 |
Fax | 86 - 010 - 80542473 |
Homepage | http://www.csa-cement.com |
Contact | Jack Young / Sales Manager |