Thermal insulation mortar

Abstract

The invention discloses thermal insulation mortar which comprises the following components in percentage by weight: 20 to 60 percent of caustic calcined magnesia, 1 to 25 percent of fly ash, 5 to 35 percent of thickening time control agent, 0 to 40 percent of enhanced thickener, 1 to 20 percent of kieselguhr, 5 to 35 percent of expanded aggregate, 0 to 5 percent of polystyrene foam particles, 0 to 0.2 percent of polypropylene fiber, 0.5 to 8 percent of water-resisting admixture, and 0 to 2 percent of water reducing agent. The thermal insulation mortar has the characteristics of capability of coagulating and hardening quickly and having strong binding capacity with base materials, good volume stability, capability of producing volume micro-expansion in the process of coagulating and hardening, no crack, no splitting, strong water resistance, ageing resistance, long service life, light weight, and good heat preservation and heat insulation performance, wherein the coefficient of thermal conductivity is 0.05 to 0.30 W / m.k. The thermal insulation mortar has the advantages of no toxicity, odourlessness, zero radioactivity, no harm to human bodies, no pollution to environments, energy conservation, environmental friendliness and low production cost.

Description

technical field [0001] The invention relates to a mortar in the technical field of construction engineering, in particular to a thermal insulation mortar used for exterior walls. Background technique [0002] At present, the country is vigorously developing and promoting environmental protection and energy-saving building structures. The implementation of building energy conservation must greatly improve the thermal performance of maintenance structures, especially external walls. Generally speaking, there are two main energy-saving methods for building maintenance structures: one is to directly select the thermal insulation wall structure; the other is to apply a layer of thermal insulation mortar on the outer layer of the wall. In comparison, the outer layer of the wall is painted with thermal insulation mortar, and the construction is simple, especially for the existing building structure, its advantages are more obvious. Therefore, the method that building exterior wal...

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Problems solved by technology

Chinese patent CN101148342A "Crack Resistant and Waterproof Polystyrene Particle Thermal Insulation Slurry", in view of the lack of easy cracking and durability of thermal insulation mortar, it is proposed to use infrared reflective material, polypropylene short fiber and polymer emulsion to modify, and the prepared thermal insulation material has High adhesion, no cracking and deformation, strong anti-leakage ability, etc., but compared with other thermal insulation mortar materials, its price is more expensive and the construction period is longer

Chinese patent CN101229969A "rubber powder polystyrene particle thermal insulation mortar" uses cement, mineral additives, air-entraining agent, thickener and polystyrene foam particles and mortar to prepare thermal insulation mortar. This patented product can be well formed with the wall A whole, but its drying shrinkage is relatively large, which cannot be solved well

Chinese patent CN101032841A "Single-component dry-mixed thermal insulation mortar and its production method" discloses a building wall thermal insulation material, which includes ordinary cement, expanded perlite, polystyrene, fly ash, and redispersible rubber powder , HF-2000 water-soluble anti-cracking rubber powder, hydroxypropyl methylcellulose, polypropylene short fiber, lignin fiber, etc., but the compressive strength of the insulation material is less than 0.2MPa, and the strength is low, which cannot reach the external insulation of the external wall. The ideal strength standard of the system; and the construction process of the insulation material is complicated, and the construction quality is difficult to be guaranteed

Through the analysis of the existing thermal insulation mortar materials, the cementitious materials used are basically cement matrix. After setting and hardening, they have large drying shrinkage characteristics, easy to crack, poor frost resistance, not easy to construct in winter, and hardening is relatively slow. Slow, and the ability to bond with the substrate is limited, which is limited in practical engineering applications

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