Thermal Insulation Combustion Performance Requirement In Building

Exterior wall insulation materials are usually divided into inorganic insulation materials and organic insulation materials.Once the thermal insulation materials are burnt, it will bring great problems to people's life, health and property safety.

In 2015, GB 50016-2014 "Code for Fire Prevention Design of Buildings" was promulgated and implemented, in which the chapter on heat preservation and fire prevention of exterior walls of buildings was specially added to regulate relevant design work. The general principles are as follows:

1.Building height and building type as the basis of thermal insulation material selection and fire prevention, personnel intensive buildings must choose grade A thermal insulation material;

2.For non-densely populated buildings, non-combustible grade A insulation materials are encouraged to use,and B1 / B2 thermal insulation materials are used carefully under restricted conditions;

3.When it is necessary to choose GRADE B1/B2 insulation materials, corresponding fire prevention measures should be added to make up for the shortcomings of grade B insulation materials.

The implementation of GB50016-2014 shows that relevant management departments attach great importance to the fire safety of thermal insulation materials, and play a positive role in the promotion and application of non-combustible thermal insulation materials, reducing building fires and maximizing the safety of residents' lives and properties. In view of the strict requirements of the standard, there is no lack of various advocating modified materials and fire insulation structure in the market, such as individual insulation material manufacturers advocating through the fire isolation belt and fire-resistant Windows and other structural measures can achieve the external wall insulation system fire insulation requirements, but in the actual engineering application is still prone to safety problems. In March 2019, yuanhong Jinjiang Residential area, Kaifeng city, as an example, the fire spread from the second floor to the roof in a very short time by using the B1 level extruded polystyrene board and foamed cement fire isolation belt external wall insulation system.

Therefore, the external insulation of building exterior wall is related to the goal of building energy conservation and carbon reduction, which needs to be paid great attention to. The fire performance of the external insulation system of the external wall relates to the safety of people's lives and property. The two should be considered as a whole, and the system with mature technology, process and material should be adopted to minimize the safety risk.