Steam-pressurized concrete block plastering masonry general mortar and preparation process

Abstract

The invention relates to steam-pressurized concrete block plastering masonry general mortar and a preparation process. The general mortar comprises the following components in parts by weight: 40-50 parts of ordinary Portland cement, 30-48 parts of sandstone, 10-25 parts of vitrification micro-beads, 0-2 parts of latex powder, 0.2-0.3 part of PP fibers, 0.05-0.1 part of a water reducing agent, 0.3-1 part of cellulose ether, 0.01-0.04 part of starch ether, 0-0.08 part of a defoaming agent and 0-0.4 part of an early strength agent. The general mortar provided by the invention is small in density, light in self-weight, low in thermal conductivity, good in adhesion, good in heat preservation and good in crack resistance, and the mortar joint masonry is not more than 5 mm, the thickness of a plaster layer is less than 5 mm, the construction efficiency is improved, the thermal conductivity is equivalent to that of a steam-pressurized concrete block, and a whole can be formed, so that the self-weight of a wall is reduced, the phenomenon of thermal bridges in the wall is eliminated, and the phenomena of hollow and cracking are avoided.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a universal mortar for steam pressurized concrete block plastering and masonry and a preparation process thereof. Background technique [0002] Autoclaved aerated concrete block is an important part of new building materials. It is a lightweight porous material with the advantages of light bulk density, good thermal insulation, good sound absorption and machinability. It can be used in load-bearing or non-load-bearing structures in buildings. Traditional plastering mortar and masonry mortar are two kinds of materials with high density and high thermal conductivity, poor workability on aerated blocks, and the base surface needs to be wetted before plastering and masonry, when the plastering thickness is less than 5mm , and the autoclaved aerated concrete block has poor adhesion and is easy to hollow and crack, resulting in the formation of multi-point and mu...

AI Technical Summary

Problems solved by technology

Patent CN106316275 A mentions the plastering mortar suitable for machine spraying. Although it is suitable for mechanical spraying, it does not take the thermal insulation of the autoclaved aerated concrete block into consideration, resulting in a gap between the autoclaved aerated concrete block and the plastering layer. thermal bridge phenomenon