JT-HPRA Slump-preserving Polycarboxylate Water Reducer
Zhongsen brand JT-HPRA slump-preserving polycarboxylate water reducer is a carboxylic acid graft copolymer concrete admixture developed by Zhongsen Company, with super slump-preserving function. The product has strong adaptability to concrete preparation materials and low dosage. It is especially suitable for concrete projects that require long-term fluidity retention, high temperature slump retention, medium and low slump retention, and prefabricated pumping.
1. Product Features
1. High slump retention, the slump and expansion of concrete can be lost within 3-4 hours, and the initial and final setting time of concrete can be extended by 5-8 hours according to construction requirements.
2. It can better meet the working performance of concrete mixture and ensure the final performance of hardened concrete when used in combination with water-reducing type.
3. Does not contain chloride ions, has no corrosive effect on steel bars, and improves the durability of concrete.
4. Strong adaptability, the product is suitable for cement of various specifications and strength grades, and has good compatibility with active admixtures such as slag and fly ash.
5. The product has stable performance, non-toxic and non-polluting, long-term storage without stratification, and no crystallization in winter.
6. This product is colorless or light brown transparent liquid, solid content 40+1%, water reduction rate ≥25%, density 1.08+0.02kg/m³
2. Scope of application
1. Suitable for mass concrete, self-compacting concrete, medium-low slump concrete, high-strength concrete, etc. in hot weather conditions.
2. It is suitable for prefabrication, pipe piles, pumping, long-distance transportation, fluidized concrete, medium and high-grade concrete and ultra-high-strength concrete of various grades.
3. It is suitable for precast and cast-in-place concrete, reinforced concrete and prestressed concrete for industrial and civil buildings, roads, bridges, ports, airports, high-speed railways and other engineering construction.
3. Use examples
Trial test results of C30 concrete in a commercial mixing station of Zoomlion in summer
Test number |
Cement kg/m³ |
Mineral powder kg/m³ |
Fly ash kg/m³ |
Machine-made sandkg/m³ |
1-2 stone kg/m³ |
1-3 stone kg/m³ |
Water kg/m³ |
Additives |
Initial performance/mm |
2h performance/mm |
Admixtures in use |
200 |
100 |
80 |
875 |
850 |
120 |
165 |
2.2 |
210/530 |
150/350 |
Zhongsen Admixture |
200 |
100 |
80 |
875 |
850 |
120 |
165 |
2.2 |
230/550 |
220/530 |
4. How to use
1. Recommended dosage: 0.2-1.2% of the amount of cementitious materials.
2. It is recommended to carry out a mixing ratio test before use to determine the optimal dosage.
3. Compatibility test should be carried out when cement varieties are replaced.
4. This product is a high-content water-reducing agent, which must be determined by tests before it is used in combination with other types of admixtures.
5. Package storage
1. It can be transported by tank truck or plastic ton barrels, and can also be specially packaged according to user requirements.
2. The warranty period of this product is one year. If there is precipitation during the warranty period, it should be used after mixing, which will not affect the effect.
Containers containing this product must be sealed to prevent exposure to sunlight and freezing.
6. Precautions
1. When the cement variety is updated or the cement is newly introduced, the compatibility test with the cement should be carried out.
2. The correct amount must be added according to the test mix ratio. When pouring concrete, it should be operated in strict accordance with the construction specifications.
3. It should not be used in combination with naphthalene-based admixtures. When compounding with other admixtures, its compatibility should be checked first.
4. Like conventional concrete projects, maintenance must be strengthened according to construction specifications.
5. For concrete constructed in winter, it is recommended to take antifreeze and heat preservation measures such as covering with grass and plastic film, and strengthen the maintenance according to the construction specifications.
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