As is well known, the fire resistance of ceramic particles has always been excellent, much better than ordinary building materials.
Taking ceramic aggregate concrete as an example, the fire resistance of ordinary fly ash ceramic aggregate concrete is more than four times that of ordinary concrete. Under the same fire resistance period, the thickness of ceramic aggregate concrete is 20% thinner than that of ordinary concrete. In addition, fly ash ceramic particles can also be used to prepare refractory concrete with a fire resistance below 1200 ℃. At a high temperature of 650 ℃, ceramic aggregate concrete can maintain 85% of its strength at room temperature. However, ordinary concrete can only maintain 35% to 75% of its strength at room temperature.
On the outside of the ceramic particles, due to the main raw materials used for firing ceramic particles being mullite, quartz, a small amount of iron magnesium oxide silicides, and a large amount of glass, due to the high strength of crystal minerals such as mullite. Especially on the surface of the ceramic particles, there are many glass bodies, which not only have high strength, but also good fire resistance and chemical stability.
The interior of the ceramic particles is formed by high-temperature (1200-1300 ℃) roasting, with a high amount of silica and aluminum oxide inside, resulting in a higher fire resistance. According to experimental measurements, the fire resistance of ceramic particles is 1610 ℃, which can be used to prepare ceramic particle concrete with a heat resistance of about 1000 ℃.