Wanda kang agricultural
science and technology
Little knowledge of concrete admixtures:
Definition of science and technology
Chinese name:Concrete additive
English name:concrete admixtures
Definition: In order to improve the concrete performance, when mixing concrete mixing with the material.
Concrete additiveMeans to improve and adjustconcreteAdding of material performance.With more attention paid to the concrete admixture in engineering application, admixture added to improveThe performance of the concretePlay a role, but the selection of admixture, adding methods and adaptability will seriously affect their development.
Hereinafter referred to as concrete admixtures (English: concrete admixtures)additive, it is to point to in the process of mixing concrete mixed with concrete to improve the performance of the material.Concrete admixture dosage generally no greater than 5% of the mass of cement.The quality of concrete admixture products must conform to the national standard "concrete admixture" (GB 8076-2008).
According to the main function is divided into four categories:
(1) improvement of the admixture of concrete and mixture, including all kinds ofWater reducing agent、Air-entraining agentandPumping agentAnd so on;
(2) adjust the concreteSetting time、Hardening of thePerformance of the admixture, includingretarder、Early strength agentandSetting acceleratorAnd so on;
(3) improve the concreteThe durability ofAdmixtures, includingAir-entraining agent、Waterproofing agentandRust inhibitorsAnd so on;
(4) to improve other performance of concrete admixtures, includingAir entrained agent、Expansive agent、antifreeze、colorant、Waterproofing agentAnd pumping agent, etc.