Fire-resistant glass technology systems - fire glass fire characteristics and application status 1

From a technical point of view, in developed countries, glass fire is seen as a system that requires fire-resistant glass and frame systems have fire safety features. Misunderstanding of the presence, often focus only on the glass itself fire, which also led to some gaps of fire-resistant glass supporting the overall level of developed countries. Excellent performance and then fire-resistant glass, if there is no matching fire framework and fire sealing materials, fire-resistant glass is not a complete system; and vice versa, complementarity between them. GB 15763.1 2001 a "safety glass building with fire-resistant glass" on l Number amendments clearly states should insert sample when tested in the fire-resistant glass and actual project supporting the use of the framework of the system, that is refractory to emphasize the different systems of fire-resistant glass performance differences, which also indirectly spawned the development of fire-resistant glass and gradually mature system technology in China.

According to fire resistance, fire-resistant glass can be divided into non-insulated fire-resistant glass and insulated fire glass. Insulated fire glass fire-resistant properties meet fire integrity and fire insulation (such as a standard fire test fire back surface temperature exceeds the average initial temperature of 140 ℃ or fire back surface temperature exceeds the highest point of the initial temperature of 180 ℃, is considered specimen lose insulation) of fire-resistant glass, class a fire-resistant glass that is `non-insulated fire-resistant glass is fire-resistant properties can only meet fire integrity requirements of fire-resistant glass, the class C fire-resistant glass.

According to (architectural safety glass - Part l GB15763.1 a 2009: fire-resistant glass "requirement, A Class, Class C fire resistance of fire-resistant glass is divided into 0.5h, 1.0h, 1.5h, 2.0h, 3.0h five levels fireproof glass during the fire resistance test should use open flame heating, the specimen being similar to the actual fire flame effect. test furnace temperature change over time, which should satisfy the variation as a function of T-T0 = 345 lg ( 8t + 1) where: T- warmed to time t average furnace temperature, ℃; initial temperature T0- furnace within the range of 5 ℃ -40 ℃ the; t- test elapsed time, min should be noted. that when the fire-resistant glass used in smoke screen, the main impact of the flue gas heat, the fire resistance standard fire test requirements and have some differences, the general requirements according to GB / T9978 a 2008 "building components resistance test methods" provides heating when conditions warmed to 620 ℃, and 620 ℃ ± 20 ℃ temperature conditions were maintained at 30min, fire glass smoke screen should maintain the integrity is not destroyed.

According to the structure, it can be divided into fire-resistant glass composite fire-resistant glass and fire monolithic glass. At present, fire monolithic glass are mainly two techniques: an integrated enhancement of high-strength fire monolithic glass and special fire-resistant glass (with borosilicate glass-based fire). Composite fireproof glass is between two glass coagulating a transparent gel having flame retardant properties, an endothermic decomposition reaction occurs when high temperatures are encountered such gel becomes opaque, blocking flame arresters. Producing composite fire-resistant glass is divided into two sandwich method and grouting method, the advantage of the insulation, the disadvantage is not directly used for external walls, deep processing of difficult, long-term ultraviolet radiation foaming, yellow and even devitrification. Compared with the composite fire-resistant glass, fire monolithic glass advantage is weathering resistance, high strength, easy processing and easy to install, etc., but not insulated. Fire monolithic glass composite fire-resistant glass and due to the difference in performance in the case of the complementary relationship between architectural applications.