Building dry powder mortar

Abstract

The invention relates to the technical field of building materials, in particular to a building dry powder mortar for building insulation board. The building plastering mortar is prepared from a mixture and water, wherein the mixture comprises the following components in portions by weight: 240-400 portions of ordinary portland cement, 30-100 portions of triple superphosphate, 500-680 portions of river sand, 20-50 portions of redispersable polymer gelatine powder, 1-3 portions of water-retaining agent and 0.2-3 portions of compound additive. The dosage of water is 4-20 times as much as the total weight portions of the mixture. The building dry powder mortar is used for construction of building external walls, and can enable the building external walls to have the advantages of favorable water retention, high binding strength, shedding resistance after moisture absorption, favorable water resistance, etc.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a building dry powder mortar used for building insulation board decoration construction. Background technique [0002] Building exterior wall construction (external wall insulation system) appeared in Europe as early as the 1970s. It significantly reduces building damage and reduces overall construction costs by reducing temperature changes and moisture condensation on exterior walls of buildings. With the continuous improvement and development of building energy-saving technology, external wall thermal insulation technology has gradually become the mainstream of building thermal insulation and energy-saving forms. Thermal insulation products at home and abroad continue to appear, and technology applications are becoming more and more perfect. Insulation boards such as polystyrene boards are usually bonded to the exterior wall with mortar, or bonded with mortar and the...

AI Technical Summary

Problems solved by technology

However, there is a problem of insufficient bonding strength between ordinary mortar and insulation board. In the process of environmental humidity changes, the strength is affected, and the insulation board is easy to fall off after moisture absorption.