Analysis on the relationship between the use of fi

2022-07-23
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Analysis on the relationship between the use of fireproof building materials and fire prevention

materials used in buildings are collectively referred to as building materials. There are many kinds of building materials. According to the physical and mechanical properties of materials, appearance and different structural parts of buildings, materials can be divided into: hard materials, light materials, roof materials, interior decoration materials and exterior wall decoration materials; According to the chemical composition of materials, materials can be divided into organic materials, inorganic materials and composite materials; This paper mainly expounds the relationship between the use of fireproof building materials and fire prevention from the aspects of laws and regulations, fire prevention principles and national technical standards

1. Legal and regulatory basis for the use of fireproof building materials

1.1 Article 11 of the fire protection law of the people's Republic of China clearly stipulates that the fire protection performance of building components and building materials must comply with national standards and industrial standards. Non combustible and non combustible materials shall be used for the interior decoration and decoration of public places in accordance with the provisions of the national technical standards for engineering construction. This law requires building materials to meet the fire performance requirements from the perspective of national laws, especially the mass production and use of combustible and flammable decoration building materials in public places

1.2 in order to ensure the fire safety of the interior decoration of buildings, implement the fire protection policy of "prevention first, combination of prevention and elimination", and prevent and reduce the harm of building fires, the national standard of the people's Republic of China "code for fire protection in the design of interior decoration of buildings" is specially formulated, which covers the decoration of ceilings, walls, floors and partitions, as well as fixed furniture, curtains, curtains, bedspreads, furniture wrapping Fixed decorations and other aspects have made specific requirements for the fire performance of decoration materials

1.3 in order to prevent and reduce building fire hazards and ensure that the fire prevention construction quality of building interior decoration works meets the fire prevention design requirements, the Ministry of construction of the people's Republic of China issued the national standard code for construction and acceptance of building interior decoration on April 15, 2005. Articles 2.0.4 and 2.0.5 of the code clearly stipulate that the decoration materials entering the construction site shall be intact, and their combustion performance or fire resistance limit shall be checked Whether the fire performance type inspection report, certificate of conformity and other technical documents meet the fire protection design requirements. After the decoration materials enter the construction site at the same time, the inspection unit with corresponding qualifications shall witness the sampling inspection

2. Several concepts that need to be clarified

2.1 "oxygen consumption" principle. In 1917, throton

found that when a large number of organic liquids and gases were completely burned, the net heat released per unit mass of oxygen consumed was close to a constant. Huggett (1980) found that this phenomenon also exists for organic solids, and the average value of this constant is 13.1mj/kg. This principle is called "oxygen consumption" principle

2.2 combustion performance grade of decoration materials. In China, decoration materials are divided into four levels according to their performance, as shown in the following table:

grade decoration materials combustion performance

a noncombustibility

b1 flammability

b2 flammability

b3 flammability

2.3 resistance to qdlp (qualified domestic limited partner) mode fire limit of venture capital market exploration. The so-called fire resistance limit refers to the fire resistance test of building components according to the time temperature standard curve. The period from the time when they are subjected to fire to the time when they lose their support capacity or integrity or lose their heat insulation function is called the fire resistance limit, which is usually expressed in hours

3. Working principle of fireproof building materials

if there are more combustibles per unit area in the building, i.e. more fire loads, the longer the combustion time is, the more heat is generated, and the longer the fire resistance limit of the building is required; According to the principle of "oxygen consumption", the more oxygen is consumed by fire combustion. Generally speaking, for a large space, the burning objects are exposed to the air, so there is nothing to control the oxygen consumption in the combustion process in recent years. Therefore, people have taken effective preventive measures from the combustion performance of building materials: on the one hand, it is required to use a large number of non combustible materials and non combustible materials, strictly control the use of combustible materials, and prohibit the use of combustible materials. In this way, The fire load per unit area in the building is greatly reduced, and the "congenital" factor of heat generation per unit area is reduced. On the other hand, in order to solve the contradiction between beautiful decoration and fire safety, people also allow a certain amount of combustible materials to be used in the decoration process. For this reason, the national standard has made scientific provisions on the combustion performance and fire resistance limit of building components such as floors, so as to ensure the fire safety of buildings in case of combustion of combustible materials and non combustible materials

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