The safety of glass curtain wall

In recent years, the safety problems of glass curtain wall in various places have aroused the general concern of the whole society. The safety problem of glass curtain wall is mainly manifested in the self-explosion of toughened glass and the falling off of opening fan. Toughened glass self-explosion should be a rare phenomenon, but now it has become a common phenomenon in China. There is almost no glass curtain wall without the occurrence of self-explosion of toughened glass. There are two main reasons for this. One is the poor quality of tempered glass itself. Second, the glass curtain wall is mostly high-rise, super high-rise buildings, the load is large, some even for irregular shape, which also intensifies the tempered glass self-explosion.

Nowadays toughened glass area is larger, so the thickness is bigger also, otherwise as toughened glass after blasting into dispersive characteristics of tiny particles, which will not fully implemented, namely toughened glass explosive tend to appear crack and not break the large fragments, commonly known as “tempered glass”, this “tempered glass” falling harmfulness is very great. The inevitable and unpredictable self-explosion of toughened glass makes the application of spider glass curtain wall no safety boundary, that is, the toughened glass meets the requirements of the relevant national standards, the design and installation of glass curtain wall meet the requirements of the relevant national standards, the toughened glass will also self-explosion, and even safety accidents. People do not know how to ensure the safety of the glass curtain wall, and all this is caused by the tempered glass self-explosion. Therefore, the safety of curtain wall glass is more accurate than that of curtain wall construction.

Strictly speaking, tempered glass only under the action of no load under the spontaneous burst is called the tempered glass self-explosion. In actual engineering, for no external force impact, under normal use conditions, with a typical self-explosive crack of the toughened glass fracture is also attributed to the toughened glass self-explosive. But they are fundamentally different. The reason for the self-explosion of toughened glass is the expansion of nickel sulfide particles. Nickel sulfide particles exist in flat glass and therefore in semi-tempered glass and tempered glass. The curtain wall manufacturers should pay attention to the glass. The reason is that only the thermodynamic tendency of nickel sulfide particles to transition from phase to phase is not enough, and certain dynamic conditions are required to realize this phase transition, thus resulting in the self-detonation of glass. Plate glass is annealed glass and has no stress inside.