Gypsum-based steel structure fireproof protection material containing reinforced fibers

Abstract

The invention provides a gypsum-based steel structure fireproof protection material containing reinforced fibers. The fireproof protection material is prepared by mixing the following components in percentage by mass: 82 to 95 percent of desulfurized gypsum, 3 to 15.5 percent of lightweight heat-insulating materials, 0.5 to 2 percent of reinforced fibers, 0.1 to 0.5 percent of water retaining agent, 0.1 to 1 percent of redispersible latex powder, 0.1 to 0.5 percent of retarding agent and 0.01 to 0.1 percent of air entraining agent. The lightweight heat-insulating materials can be one or two of vitrified micro-bubbles, hole-closed expanded pearlites, expanded vermiculites or sheet mica; the reinforced fibers can be one or two of glass fibers, sepiolite fibers, aluminum silicate fibers or polypropylene fibers. The fireproof heat insulation performance of the gypsum-based steel structure fireproof protection material is excellent, and the social and economic effects can be realized through waste utilization.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a gypsum-based steel structure fire protection material containing reinforcing fibers. Background technique [0002] With the continuous development of my country's economy, steel structures have been increasingly widely used due to their characteristics of high strength, light weight, simple manufacturing, short construction period, and high degree of construction industrialization. Although the steel structure itself is non-combustible, it will quickly lose its strength and deform at high temperatures. The critical temperature of commonly used building steel is generally 540°C. In a fire, the steel structure without protective measures will reach the critical temperature within a few minutes, resulting in a sharp drop in bearing capacity, causing partial or complete collapse of the building. Therefore, the steel structure Buildings must take appropriate ...

AI Technical Summary

Problems solved by technology

At present, the fire resistance of thin and ultra-thin steel structure fire retardant coatings in China is poor, and cannot meet the fire resistance limit requirements of load-bearing walls and columns for 3 hours; while the thick steel structure fire retardant coatings commonly used now have disadvantages such as easy hollowing, cracking, and falling off. The compressive strength is usually only 1MPa ~ 1.5MPa, and the surface is loose and rough after molding, so it needs to be covered with decorative panels or decorative coatings

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