Abstract
Through comparatively analyzing the impermeability and compressive strength test data of nano CaCO3 concrete with different content, this paper puts forward the method of optimizing the durability of nano CaCO3 concrete, and studies the influence of the content of fly ash on the durability of nano CaCO3 concrete on this basis, so as to provide a reference for improving the durability of concrete, so as to improve the recycling and reusing efficiency of building materials, and accelerate the practical application of nano CaCO3 concrete in engineering.
Highlights
Nano materials are at least 1-100 nm in threedimensional space
Because of its small size, it has the characteristics of small size effect, quantum size effect, surface interface effect and macro quantum tunneling effect which are not possessed by macro objects
The results show that adding nano SiO2 can improve the compressive strength and flexural strength of fly ash concrete for 7 d and 28 d
Summary
Because of its small size, it has the characteristics of small size effect, quantum size effect, surface interface effect and macro quantum tunneling effect which are not possessed by macro objects. It is known by scientists as "the most promising material in the 21st century" [1]. Studied the properties of nano CaCO3, nano SiO2 and concrete compounded with silica fume. Of Fuzhou University added nano SiO2 to fly ash coagulation, and made a preliminary experimental study on its physical and mechanical properties. The results show that adding nano SiO2 can improve the compressive strength and flexural strength of fly ash concrete for 7 d and 28 d. When fly ash can reduce the diffusion of chloride ion in nano concrete, capillary adsorption is decreasing
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