2. Generally, if the fire intensity is below 300 degrees, the loss is not great. But if it is higher than 400 degrees, the concrete will be destroyed, the strength will drop rapidly, and a series of internal reactions will occur, and the concrete will crack.
3. Generally, it will not explode, but it will crack and destroy. If the fire is very fierce, it may explode.
4. Concrete, referred to as "concrete (tóng)": refers to the general name of engineering composite materials in which aggregates are bonded into a whole by cementing materials. Generally speaking, the term concrete refers to cement as cementing material and sandstone as aggregate; Cement concrete, also known as ordinary concrete, is made by mixing and stirring water (including admixture and admixture) in a certain proportion, which is widely used in civil engineering.