What are the three major effects of fly ash in concrete?
Fly ash "micro aggregate effect" in the fly ash particle size is very small beads and debris in cement can be the equivalent of unhydrated cement grains, tiny beads equivalent to nano material and lively, can significantly improve and enhance the structural strength of concrete and improve the homogeneity of products, and compactness.
The "activity effect" of fly ash is also known as the pozzolanic effect because it contains a large amount of active SiO and AI. With Ca (OH) and other basic chemical reactions, C-S-H, hydrated calcium aluminate cementitious material, the fly ash concrete products and can serve to strengthen the role and blockage of capillary tissue in concrete, improve the corrosion resistance of concrete.
The "form effect" of fly ash contains many glass beads, the surface is smooth and the texture is dense. It is this form to water reducing effect, compact and homogeneous effect, can promote the early hydration of cement flocculation effect of solution, change the mixture rheological properties, the initial structure and hardening of the various functions, especially for pumping concrete, can play a good role in lubrication.
