Insulating dry powder mortar

Abstract

The invention discloses insulating dry powder mortar which is made from portland cement, pulverized fuel ash and / or slag powder, organic polymer emulsion powder, flame-retardant polystyrene foam particles, thermal insulating aggregate, composite fiber, water resisting agent and admixture. The insulating dry powder mortar has the advantages of light volume weight, low thermal conductivity, comprehensive utilization of waste material, environmental protection, resource saving, cracking resistance, ageing resistance, strong cohesive force, favorable workability and construction performance, convenient use, waterproofness, permeation resistance, high compression strength, convenient storage and transportation, no environmental pollution, and the like and can be widely used for preserving heat in the internal wall and the external wall of a building and other special engineering.

Description

technical field [0001] The invention belongs to the technical field of building materials and chemistry, and relates to a mortar for construction engineering, which is specifically used for heat preservation of interior and exterior walls of buildings, and in particular to a dry powder heat preservation mortar which comprehensively utilizes waste, is waterproof and anti-seepage, resists cracking, and is environmentally friendly. Background technique [0002] With the continuous improvement of environmental protection and energy conservation requirements, the country vigorously advocates environmental protection and energy-saving building structures, and the thermal insulation technology of building envelopes has become the most important way for building energy conservation. At present, the external wall insulation system in China mainly includes thermal insulation boards and thermal insulation mortars. Since thermal insulation boards are difficult to be used in the thermal i...

AI Technical Summary

Problems solved by technology

At present, the external wall insulation system in China mainly includes thermal insulation boards and thermal insulation mortars. Since thermal insulation boards are difficult to be used in the thermal insulation and energy-saving renovation of old houses, the construction is difficult and the cost is high, in the short term it should be widely used in the thermal insulation and energy-saving renovation of old houses and new buildings. It is unrealistic to use composite energy-saving wall insulation panels

Due to the large difference in thermal conductivity between traditional mortar and masonry, it is easy to produce cold (hot) bridge phenomenon, easy to crack, absorb moisture, etc., and the energy loss caused by cracks can reach more than 20%, which has great defects in external wall insulation.

Slurry thermal insulation mortar can be divided into on-site mixing and premixed slurry. On-site mixing and transportation are convenient, but due to objective reasons of equipment and man-made, the quality of the product is unstable; the quality of premixed slurry is better and can be directly processed Construction, but transportation is very troublesome

[0003] After searching the existing technical documents, it was found that the invention patent with the authorized announcement number CN 1139551C discloses an "external thermal insulation mortar and its preparation method", and its components are: cement, polymer binder, polystyrene foam particles, Fiber and water, the research results show that the thermal insulation effect is better, and its thermal conductivity is 0.103w / m.k, but the amount of cement used in this patent is large, which wastes resources; at the same time, the strength of the mortar in the later stage is not ideal; it is difficult to prepare and implement on site, and it is relatively functional. Single, unable to meet the multi-functional requirements of modern buildings for thermal insulation mortar