Powdery external wall insulation material and preparation and construction methods thereof

Abstract

The invention discloses a powdery external wall insulation material. The powdery external wall insulation material with excellent crack resistance can overcome common defects of cracking, peeling and the like of the external wall insulation material, is high in bonding strength and adhesion and has good properties such as thermal insulation, weather resistance, fireproof and waterproof performance, frost resistance and the like; thermal mortar has good volume stability, produces volume micro-expansion during setting and hardening, avoids cracking or hollowing and is high in water resistance, anti-aging and long in service life; the thermal mortar is non-toxic, odorless, energy-saving and environmentally friendly and is free of radioactivity, harmless to a human body and free of environmental pollution; compared with various insulation boards, the insulation material can form the whole insulation layer on a wall and is firmly bound with a wall surface, and a cavity is avoided between the material and a wall base course; an external wall insulation system formed by the powdery external wall insulation material is simple in structure, simple and convenient to construct, short in construction period and low in construction cost.

Description

technical field [0001] The invention relates to the technical field of engineering materials, in particular to a powdery external wall thermal insulation material and its preparation and construction method. Background technique [0002] Powdery exterior wall insulation material refers to a building material that is mixed with barrier insulation material and mortar material and used to construct the insulation layer of the building surface. At present, the powdery exterior wall insulation materials on the market are mainly divided into inorganic insulation mortar and organic insulation mortar. The inorganic thermal insulation mortar includes vitrified microbead thermal insulation mortar and composite aluminum silicate thermal insulation mortar. Vitrified microbead thermal insulation mortar has the advantages of good fire resistance, aging resistance and weather resistance, and has become a hot material in this field. Vitrified microbead thermal insulation mortar uses vitri...

AI Technical Summary

Problems solved by technology

The method adopts sepiolite fiber with high melting point, which improves the fire resistance of vitrified microbead thermal insulation mortar, and the fire resistance is A1 level, and the thermal conductivity of vitrified microbead thermal insulation mortar reaches below 0.065W / m.K. However, sepiolite Fiber-modified vitrified microbead thermal insulation mortar has disadvantages such as high energy consumption, and the bond strength and strength properties of the mortar in this document are only literal descriptions without specific conclusive data support. The inventors are studying glass In the process of thermal insulation mortar mixed with vitrified microbeads, it was also found that the thermal conductivity of vitrified microbeads decreased with the increase of the amount of vitrified microbeads, while the compressive strength, water immersion compressive strength and bonding force and other properties are greatly affected, and they all decrease with the increase of the amount of vitrified microbeads

Therefore, while ensuring that the thermal conductivity of the thermal insulation mortar can meet the requirements, there are problems such as compressive strength and water immersion compressive strength.