A-grade non-ignitable heat insulating material and preparation method thereof

Abstract

The invention relates to an A-grade non-ignitable heat insulating material and a preparation method thereof. The raw materials of the heat insulating material include, by mass, 45% to 60% of cement, 24% to 36% of modified vitrified microbead, 13% to 26% of mineral micro powder, 1% to 4% of exciting agent, 0.02% to 0.90% of early strength agent, 1% to 3% of redispersible latex powder and 0.10% to 0.30% of foaming agent. The preparation method of the heat insulating material includes the steps of preprocessing of the cement, modification of the vitrified microbead, preparation of the existing agent and the preparation of the heat insulating material. The A-grade non-ignitable heat insulating material and the preparation method thereof have the advantages of improving heat insulating performance of buildings, reducing energy consumption of the buildings and improving security of the buildings. Simultaneously, the provided heat material has the advantages of low dry density, low thermal conductivity and high strength.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a novel Class A non-combustible thermal insulation material and a preparation method thereof. Background technique [0002] my country's annual urban and rural new housing construction area is nearly 2 billion square meters, and existing buildings are nearly 42 billion square meters. Building energy consumption has accounted for more than 27% of the country's total energy consumption. Building energy conservation has become an important link in my country's sustainable development. It is the energy saving of the envelope structure that has a particularly important position. The most commonly used insulation materials, such as extruded polystyrene board (XPS) or expanded polystyrene board (EPS), despite their advantages such as low thermal conductivity and low density, as organic materials, their flammability poses a great safety hazard. In recent years, fires in "CCT...

AI Technical Summary

Problems solved by technology

However, at present, most of the vitrified microspheres produced in our country have problems of excessive bulk density and water absorption

In southern my country, the dry density of thermal insulation mortar prepared using vitrified microbeads as aggregate is generally high, which greatly affects its thermal insulation performance.

At the same time, the water absorption rate (60%-150%) of the vitrified microbead thermal insulation materials prepared at present is too high, resulting in high water absorption rate, and the bulk density of the prepared thermal insulation materials is mostly 300-500kg / m 3 , the thermal conductivity is 0.075-1.5 / W / m K, and the strength is low, which cannot meet the requirement of 65% energy saving for buildings in my country, especially in the cold north

There are few studies on the preparation of light-weight and high-strength inorganic thermal insulation materials with vitrified microbeads

Images