A kind of refractory coating and preparation method thereof

Abstract

The invention relates to the technical field of fireproof coatings, and concretely relates to a fireproof coating and a preparation method thereof. The fireproof coating comprises, by weight, 60-80 parts of a fireproof base material, 20-30 parts of a binder, 5-7 parts of SiO2 aerogel, 3-4 parts of mullite, 5-7 parts of potassium octatitanate whiskers, 3-5 parts of sericite, 5-9 parts of titanium dioxide powder, 10-15 parts of dipentaerythritol, 3-5 parts of a dispersant, 2-4 parts of an antifoaming agent and 1-5 parts of talcum powder. The invention also provides the preparation method of thefireproof coating. The preparation method comprises the following steps: stirring all solid components in above raw materials by a grinder, filtering the ground solid components by a sieve to obtain filtered ground solid components for later use, weighing all the raw materials in proportion, grinding all the raw materials in a ball mill, and filtering the ground raw materials multiple times. The fireproof coating has good high temperature resisting and heat insulating effects, and can effectively protect steel materials in buildings in the fire scene.

Description

technical field [0001] The invention relates to the technical field of refractory coatings, in particular to a refractory coating and a preparation method thereof. Background technique [0002] As a form of building structure, steel structure is known for its flexible structure, light weight, high strength, good earthquake resistance, easy maintenance, short construction period, small structure occupation area, low foundation cost, and recyclable use. For the "green building" of the 21st century. Although steel structure has many advantages, compared with reinforced concrete structure and masonry structure, it has a disadvantage that cannot be ignored - poor fire resistance. Although steel is a non-combustible material, its yield strength, elastic modulus, etc. will decrease with the increase of temperature under the high temperature of fire, and its bearing capacity and balance stability will decrease significantly with the increase of temperature. Generally, the critical...

AI Technical Summary

Problems solved by technology

Although steel structure has many advantages, compared with reinforced concrete structure and masonry structure, it has a disadvantage that cannot be ignored - poor fire resistance

Although steel is a non-combustible material, its yield strength, elastic modulus, etc. will decrease with the increase of temperature under the high temperature of fire, and its bearing capacity and balance stability will decrease significantly with the increase of temperature

Generally, the critical temperature of commonly used construction steel is about 540°C. For building fires, the fire scene temperature is mostly 800~1200°C. Under such high temperature conditions, steel structures without any protection will soon undergo plastic deformation. Under the test conditions of the heating curve, the fire resistance limit of steel components is only 0.25h, which will cause the building to collapse in severe cases