Construction waste reclaimed brick powder-containing spray construction heat insulation mortar

Abstract

The invention discloses a construction waste reclaimed brick powder-containing spray construction heat insulation mortar. The mortar is prepared from, by weight, 500-700 parts of construction waste reclaimed brick powder, 100-310 parts of a gelling material, 10-20 parts of redispersible powder, 3-5 parts of hydroxypropyl methyl cellulose ether, 2-4 parts of a crack resistant fiber, 0.1-1 part of an anti-sagging agent, 0.1-0.5 parts of a water repellent, 0.03-0.3 parts of an air entraining agent, 0.8-1.2 parts of a water reducer and 1000 parts of water. The mortar has the characteristics of A grade flame retardation, good heat insulation performance, high compression and tensile strength, long life, environmental protection, waste recycling, easy mechanical spraying construction, construction energy consumption reduction, suitableness for internal and external wall heat insulation construction, simplicity, feasibility and low cost.

Description

technical field [0001] The invention belongs to the technical field of construction waste recycling, and relates to thermal insulation mortar for spraying construction containing construction waste. Background technique [0002] In recent years, with the rapid development of the real estate industry, the treatment of construction waste has attracted more and more attention. Random stacking or landfilling of construction waste directly affects the destruction of the ecological environment of the occupied rivers, lakes, land or forests. The generation and removal of construction waste will produce dust and dust, which are important sources of inhalable particulate matter (PM2.5 and PM10) in the air. In addition, construction waste also contains more than 20 kinds of harmful substances, which will directly damage the vegetation on the ground, change the structure and properties of the soil, affect the microbial activities in the soil, and block the soil biological chain. And ...

AI Technical Summary

Problems solved by technology

Patent CN103693913A describes a kind of thermal insulation mortar of modified vitrified microbeads, and CN102010166A describes a preparation method of micro-expansion inorganic thermal insulation mortar. Perlite or vitrified microbeads are used for inter-expansion. During the mechanical spraying process, whether it is a squeeze pump or a screw pump, it is very easy to break the expanded perlite or beaded microbeads with very low strength, resulting in mixed materials. The overall bulk density increases, the thermal conductivity becomes larger, and the slurry yield drops to about 50%.

According to the national standard "Building Insulation Mortar" (GB / T20473-2006), the thermal conductivity of Type I building insulation mortar should be ≤0.07W / (m K), and the thermal conductivity of Type II building insulation mortar should be ≤0.085W / ( m K), which obviously cannot meet the requirements of its use, and undoubtedly has a major impact on wall insulation

This is also the main reason why the insulation mortar cannot be mechanized in recent years.

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