Concrete admixture is to point to improve and adjust the performance of concrete and admixture of the material, concrete admixture in the application of the project more and more attention
polycarboxylate superplasticizer is to point to improve and adjust the performance of concrete and admixture of the material, concrete admixture in the application of the project is more and more taken seriously, the addition of admixture to improve the performance of concrete has a certain effect, but the choice of admixture, add method and adaptability will seriously affect its development.
After adding admixtures in concrete, because of the variety is different, the effect produced is also different, most is to produce physical action, such as adsorption at the surface of cement particles to form adsorption film, changed the potential, produce different suction or repulsion.
Some will destroy the flocculation structure, improve the stability of cement diffusion system, improve the conditions of cement hydration.
Some can form macromolecular structure, change the adsorption state of the surface of cement particles, and some will reduce the surface tension and surface energy of water.
A few are directly involved in chemical reactions with the cement to form new compounds.
Because the admixture can effectively improve the performance of concrete, and has good economic benefits, in many countries have been widely used, become an indispensable material in concrete, especially the use of polycarboxylate superplasticizer.
Cement particles can fully dispersed, water consumption is greatly reduced, cement potential into full play, the cement stone is relatively dense, pore structure and interface microstructure is well improved, so as to make the physical and mechanical properties of the concrete had the very big enhancement, whether it be impervious, or chloride ion diffusion, carbide, sulfate attack resistance.
As well as anti-impact, wear-resisting performance and other aspects are better than the concrete without admixtures, not only improve the strength, improve workability, but also improve the durability of concrete, only mixed with polycarboxylate superplasticizer, the preparation of high construction sex, high strength, high durability of high-performance concrete is possible to achieve.
