Tunnel lightweight inorganic fireproof composite material

Abstract

The invention provides a light inorganic fireproofing composite material for tunnel, which is compounded by three layers of materials from inside to outside; the first layer is spray inorganic fireproofing material, the components of which comprise inorganic fireproofing fiber, expanded vermiculite powder, expanded graphite powder and ordinary Portland cement; the second layer is surface fireproofing material, the components comprises ordinary Portland cement, mica powder, gypsum and talcum powder; the third layer is fireproofing decorative material, which is a fire-retardant single-side composite aluminum foil. The composite material has the advantages that: the fire endurance is high; the thermal conductivity in hydrocarbon fire scene is extremely low; the fireproofing result is excellent; the self quality loss in fire is less without melting and dropping; the weight is light; the weathering is good; the sound-absorbing is good and the high-frequency drying reduction is obvious; the cost is low; the construction strength is less and the charge is low; furthermore, the ornament is good and the surface is smooth and beautiful surface, thereby the invention can mainly be used in the fire protection for the tunnel wall.

Description

technical field [0001] The invention relates to a fireproof material, in particular to a lightweight inorganic fireproof composite material for tunnels. Background technique [0002] At present, fireproof materials are more and more widely used in road and railway tunnel engineering, especially the fire protection of road tunnels. Fireproof coatings and fireproof boards are currently used for fireproof and heat insulation protection of tunnels. Among them, fireproof coatings mainly include tunnel fireproof coatings, and fireproof boards include paper-faced gypsum boards, calcium silicate boards, hollow slats, glass fiber reinforced cement boards, composite slats, and composite slabs. Each of these materials has advantages and disadvantages. Chinese patent 200610020287X discloses a multifunctional lightweight inorganic fireproof fiber sheath material, its components include inorganic fireproof fiber, expanded vermiculite powder, ordinary Portland cement, setting accelerator...

AI Technical Summary

Problems solved by technology

This is because firstly, the light in the tunnel is weak, and the purifying bactericide cannot effectively play an antibacterial and bactericidal effect; secondly, it cannot meet the requirements for fire resistance time in the hydrocarbon fire test conditions with rapid temperature rise; thirdly, the surface is uneven and decorative poor sex