The use of concrete additives:Concrete additive is a substance used to improve the performance of concrete.
A brief description of concrete additives：
In the process of mixing concrete. The dosage is generally less than 5% of cement quality.
There are four main functions:
(1) improve the additives for concrete mixing and performance, including various water-reducing agents, air degassing agents and pumping agents;
(2) the admixtures that regulate the solidification time and hardening performance of concrete include retarder, early strength and accelerator, etc.;
(3) improvement of concrete durability admixtures, including air degassing agents, water repellents and rust inhibitor;
(4) to improve the additives of other properties of concrete, including aerating agent, expansion agent, antifreeze agent, colorant, waterproof agent and pump delivery agent.
The definition of concrete additives:
1.Water reducing agent
Ordinary water reducer water-reducing admixture
Under the same conditions of concrete slump, the admixtures of mixing water consumption can be reduced. The commonly used water reducer is anionic surfactant.
superplasticizer
It can greatly reduce the admixture of mixing water consumption under the same conditions of concrete slump.
Retarded jianshuiji set retarding and water - reducing admixture
Admixtures of both retarded and water-reducing functions.
Early strength jianshuiji hardening accelerating and water reducing admixture
Admixture with early strength and water reducing function.
Air entraining and water reducing admixture
Admixtures with both air and water - reducing functions.
2.
Early strength agent
Early strength agent hardening accelerator
Improve the early strength of concrete and the admixture with no significant influence on the later strength.
3.
retarder
Retarder set retarder
Admixtures to prolong concrete condensation time.
4.
Pumping agent
Pump delivery agent pumping aid
It can improve the performance of concrete mixing pump. The material of the pump delivery agent is high - effective water reducing agent, retarder, air - agent and thickener.
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