Self-fireproof cement-based composite material

Abstract

The invention provides a self-fireproof cement-base composite material which comprises a base material, wherein the base material is cement paste, mortar or ordinary concrete; high-temperature-triggered fireproof composite fibers and reinforcing fibers are doped into the base material; the high-temperature-triggered fireproof composite fibers are formed by wrapping an outer protective layer capable of melting at high temperature outside a fireproof core material capable of foaming and expanding to implement heat insulation and flame retardancy at high temperature; and when the base material contacts high temperature, the outer protective layer of all the high-temperature-triggered fireproof composite fibers is heated and molten to form the network passages through which the fireproof core material can spill over. Compared with the common cement base material, the temperature control and refractory capacities of the composite material structure can be sufficiently enhanced under the condition of not lowering the structural strength and rigidity, thereby better implementing synchronization between blowout prevention and heat insulation and intelligent fireproofing under fire hazard heat triggering. The self-fireproof cement-base composite material has the advantages of favorable durability and high long-term economic benefits, and is suitable for complete life cycle fire protection design of high-rise buildings, bridges, tunnels and other industrial buildings as well as civil buildings and transport facility structures.

Description

technical field [0001] The invention relates to a fireproof composite material, in particular to a self-fireproof cement-based composite material. Background technique [0002] The fire temperature is high (up to 1000°C or more), the heating rate is fast (with the characteristics of thermal shock), and the duration is long. The fire will not only cause heavy casualties and damage to facilities, but also cause permanent damage to the strength of building materials or steel structures. Permanent damage, such as concrete high-temperature bursting, protective layer peeling, steel bar exposure failure, concrete durability reduction, etc. In order to reduce the damage caused by fire, various fireproof materials have emerged as the times require. [0003] Chinese invention patent application 201510657437.7 discloses a self-fireproof tunnel concrete lining structure based on microcapsule technology, which includes a common concrete layer and a self-fireproof layer. The self-firepr...

AI Technical Summary

Problems solved by technology

Since the above-mentioned hot-melt microcapsules, reinforcing fibers, and anti-explosion fibers are uniformly stirred and highly dispersed in the self-fireproof layer, it is impossible to ensure that the fireproof medium in the microcapsules can overflow from the network path formed by the fibers, resulting in self-fireproofing of the concrete structure The effect is poor, and at the same time, under the trigger of the high temperature of the fire, the microcapsules that are not in effective contact with the network channels formed by the fibers will self-expand, which will cause certain damage to the concrete structure

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