Why does the glass explode when the weather is too hot?

The landlord may mean that the curtain wall glass will explode and break in summer, but it is tempered glass for curtain wall glass. The so-called tempered glass is the product of sharp cooling (quenching) of ordinary glass at high temperature, and its strength is much higher than that of ordinary glass. However, in the process of quenching, there is accumulated stress in the glass. Once it is hit beyond its strength, it will break into small pieces, instead of sharp edges and corners of various shapes like ordinary glass, so it is safer.

Because the stress distribution of tempered glass is difficult to be completely uniform, the stress accumulates unevenly in the process of repeated thermal expansion and cold contraction, so there is a certain self-explosion rate, which is a few thousandths of good and 12% of bad. Pay attention to the glass rain when walking under the building curtain wall in summer.

Ordinary glass will break only during rapid heating, because glass is a poor conductor of heat. In the process of rapid heating, due to thermal expansion and contraction, uneven hot and cold of each part will lead to fracture. This is the reason why untreated glass will break when poured into boiling water rashly. Therefore, ordinary glass will not break in summer, and the heating process of the sun is slower.