Cement lightweight mortar

Abstract

The present invention provides a cement light mortar which is the thermal insulating material at the exterior wall surface of the building, the cement is taken as the base material, the mortar comprises a light weight aggregate, a polymer modified additive and a re-dispersible emulsion powder, the light weight aggregate is expanded perlite and lime dust, the polymeric additive is the combination of cellulose ether, lignocellulose, starch ether and the polypropylene short fiber, wherein, the expanded perlite is the organosilicon-modified expanded perlite. The invention has the following advantages: the thermal conducting coefficient of the invention is reduced greatly, the material has excellent heat preserving and heat insulating property, each strength index is increased greatly comparing with the conventional heat insulating mortar, has higher crushing strength for securing the safe using; the weight is light and the sole weight of the building and the burden to the base load are effectively reduced; the construction technique is same to the conventional coating mortar and the operation is rather simple; the physical property is stable and no empty projection or cracking will occur after construction. The activity is rather low. The mortar has a broad application field and has excellent compatibility and stick force to various wall bases, the product of the invention is nontoxic and smellless, inorganic and noncombustible.

Description

technical field [0001] The invention relates to a thermal insulation material for building exterior walls, in particular to a cement lightweight mortar with good thermal insulation effect. Background technique [0002] Cement mortar thermal insulation material is an existing thermal insulation material mainly used in the external thermal insulation system of building exterior walls. It is easy to crack and fall off, which leads to the deterioration of the natural thermal insulation performance of the wall. [0003] Publication number CN101032841 discloses a building wall heat insulation material, mainly including ordinary cement, hydrophobic expanded perlite, polystyrene, fly ash, redispersible rubber powder, HF-2000 water-soluble anti-cracking rubber powder, Hydroxypropyl methylcellulose, polypropylene staple fiber, lignin fiber, etc. The commonly used rubber powder polystyrene particle insulation mortar raw material is mixed with cement and other components, and the renew...

AI Technical Summary

Problems solved by technology

[0004] The thermal insulation material has the following problems: (1) Although the thermal conductivity of the thermal insulation material is ≤0.06w / m·k, the compressive strength is ≤0.2Mpa, which is low in strength and cannot meet the ideal strength standard of the external wall thermal insulation system; ( 2) The construction process is complex and the construction quality is difficult to guarantee

The applicant of the present invention has found that the factors affecting the performance of cement insulation materials such as heat preservation and compressive strength are related to the density of cement materials after researching the performance of existing building insulation mortar, which is specifically expressed as rubber powder polystyrene particle insulation mortar The density is extremely low, and the thermal conductivity is also greatly reduced, so it has excellent thermal insulation performance, but at the same time, the compressive strength and bonding strength are also significantly reduced