Research on Chloride ion Diffusion of Concrete Water-based Capillary Crystalline Waterproofer and Its Penetration Depth by Using Electron Microscope

摘要

In order to improve the durability of concrete structure, studying reduction effect that water-based capillary crystalline waterproofer has on chloride ion diffusion coefficient in the concrete; analyse the inner microstructure of concrete by using electron microscope, and observe the penetration depth of waterproof agent in concrete directly. Research shows that: the water permeable crystalline waterproof agent can significantly reduce the diffusion coefficient of chloride ions in concrete, after concrete forms, the earlier brush waterproof agent, the longer it cure and its improving effect is more prominent after brushing waterproof agent, reduction rate of chloride ion diffusion coefficient in low strength concrete is higher than high-strength concrete; in good condition of water percolation, by detecting of electron microscope, it proved waterproofing agent can penetrate into internal concrete 6cm at least, the gel produced can be filled with pore and micro crack of concrete, so it can significantly improve the compactness of the whole structure.