The pore structure of concrete play

The pore structure of concrete plays an important influence on the durability. The pore in concrete can be divided as follows when the durability is considered: harmless pore (200 nm) [35]. It can be found that pores larger than 50 nm in concrete have adverse effects on durability. According to the classification of the pores in the cement paste and the influence of different pore sizes on the durability of concrete, the pores in the hardened cement stone cured to 28 days were divided into the following categories: 1000 nm.