Gypsum-based sound-insulation and heat-preservation thick-layer self-leveling mortar

Abstract

The invention relates to gypsum-based sound-insulation heat-preservation thick-layer self-leveling mortar which is prepared from the following components in percentage by weight: 80 to 90 percent of mixed cementing material, 8 to 10 percent of a mineral filler, 0.3 to 3.5 percent of a retarder, 0.8 to 1.3 percent of a rheology modifier, 0.0002 to 0.0005 percent of an active excitant and water. Themixed cementing material is prepared from the following components (by weight): 25 percent of ordinary Portland cement and 65 percent of alpha-hemihydrate gypsum or anhydrite. The mineral filler is vitrified microbeads. The retarder is a gypsum retarder. The rheology modifier is prepared from the following components (by weight): 0.16 to 0.2 percent of an HPMC water reducing agent, 0.1 to 0.15 percent of a defoaming agent, 0.1 to 0.15 percent of cellulose No. 400, and 0.4 to 0.8 percent of redispersible rubber powder. The active excitant is AOS powder. The gypsum-based sound-insulation heat-preservation thick-layer self-leveling mortar of the invention has the following advantages: the density is small, the weight is light, and the self-weight of a high-rise building can be reduced; noisegenerated by impact is consumed through the properties (such as damping) and the structure of the vitrified microbeads, and the sound insulation and heat preservation functions are achieved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a gypsum-based sound-insulating and heat-insulating thick-layer self-leveling mortar. Background technique [0002] Self-leveling mortar includes cement-based self-leveling / self-leveling mortar / leveling mortar, etc., which have high technological content and relatively complicated technical links. It is a dry-mixed powdery material composed of a variety of active ingredients. It can be used after mixing with water on site. After a little spreading with a scraper, a high-level base surface can be obtained. The hardening speed is fast, and you can walk on it within 24 hours, or carry out follow-up projects (such as laying wood floors, diamond boards, etc.), and the construction is fast and simple, which is unmatched by traditional manual leveling. [0003] With the improvement of living standards, people pay more and more attention to the performance of building sound i...

AI Technical Summary

Problems solved by technology

However, the sound-proof mortar on the market today does not have the performance of self-leveling, and the self-leveling does not have the performance of sound insulation, so there is an urgent need for a high-performance mortar with sound insulation and self-leveling to meet people's requirements for indoor buildings.