Gypsum-based heat-insulation mortar and preparation method thereof

Abstract

The invention discloses gypsum-based heat-insulation mortar and a preparation method thereof. The gypsum-based heat-insulation mortar is prepared from the following ingredients in parts by weight: 15to 25 parts of Portland cement, 30 to 40 parts of building plaster, 10 to 20 parts of glass bead, 10 to 30 parts of converter steel slag, 10 to 20 parts of coal ash, 5 to 15 parts of nano silicon dioxide powder, 15 to 25 parts of ash calcium powder, 5 to 10 parts of modified pulpified starch, 2 to 8 parts of dispersible latex powder, 5 to 15 parts of cellulose ether, 3 to 8 parts of crack-resistant fiber, 5 to 15 parts of modified talcum powder, 4 to 10 parts of binder, 0.3 to 0.7 part of air entraining agent, 0.2 to 0.6 part of water repellent, 0.1 to 0.5 part of water reducing agent and 40 to 60 parts of water. The gypsum-based heat-insulation mortar disclosed by the invention has the advantages of high strength, good heat insulation, small drying shrinkage, no easiness in cracking and the like. The gypsum-based heat-insulation mortar can meet a requirement of building industry to mortar performance indexes and can be widely applied to projects of heat insulation and the like of outer walls and inner walls of buildings.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a gypsum-based thermal insulation mortar and a preparation method thereof. Background technique [0002] People's awareness of environmental resource protection has gradually strengthened, and building energy conservation and environmental protection have received more and more attention. [0003] After entering the 21st century, my country's urbanization process has developed rapidly, followed by a sharp increase in energy consumption. Construction, industry, and transportation are the three major areas of energy consumption in China. Among them, construction accounts for nearly 30% of China's total energy consumption. It is estimated that In 2020, the total energy consumption of buildings accounts for 50% of the total energy consumption of the whole society, of which external wall insulation, roof insulation, and door and window heat dissipation account for 50% of the...

AI Technical Summary

Problems solved by technology

However, there are also disadvantages such as relatively low strength of phosphogypsum-based thermal insulation mortar, large drying shrinkage, easy cracking, poor frost resistance, high thermal conductivity, and insufficient thermal insulation performance.