Machine sprayed mortar for thin plastering system

Abstract

The invention provides machine sprayed mortar for a thin plastering system. The mortar comprises the components in percentages by weight: 20-30% of common silicate cement, 58.65-76.11% of 40-120-mesh river sand, 2-8% of filler, 1.83-3.15% of a water-retaining thickening material, 0-0.2% of a thixotropic agent, 0.05-0.15% of a water reducer and 0.01-0.05% of a water repellent, wherein the water-retaining thickening material is prepared by mixing 1.5-2.5% of redispersible latex powder, 0.2-0.4% of hydroxypropyl methyl cellulose, 0.03-0.05% of starch ether and 0.1-0.2% of anti-crack fibers. The components are uniformly mixed in a mixing device, and 18-22% by weight of water is added at a normal temperature and a normal pressure to stir slurry which can be used for mechanical construction of the thin plastering system, so that the construction efficiency is increased, the construction period is shortened, and the labor cost is lowered.

Description

Technical field [0001] The invention relates to building materials, belonging to the field of mortar for construction, and more specifically, to a machine-blasted mortar for a thin plastering system. Background technique [0002] Thin-plastered external wall insulation system (referred to as "thin-plastered system") is to paste the insulation board on the external wall with special bonding mortar as required (if there are special reinforcement requirements, expansion screws can also be used to anchor) , And then apply mortar on the surface of the insulation board, and press into the alkali-resistant glass fiber mesh when applying the mortar to strengthen it to form a crack-resistant mortar protective layer (that is, the plastering mortar layer), and finally coating the paint to form a decorative surface layer (If the decorative surface is ceramic tiles, galvanized steel wire mesh, special tile adhesive, jointing agent, etc. should be used instead). Among them, the plastering mor...

AI Technical Summary

Problems solved by technology

However, due to technical reasons such as aggregate particle grading, raw material screening, and raw material formulation, ordinary mortar has not achieved substantial breakthroughs. The performance of mortar cannot meet the requirements of mechanical spraying construction technology at the same time, so there is still no progress in construction progress and strength. To get qualitative improvement or enhancement, the main problems are:

[0003] 1. The pumping performance of the existing ordinary mortar mechanized spraying is poor, and pipe plugging is prone to occur;

[0004] 2. Poor sag resistance, which is not conducive to forming a plastering mortar layer on the insulation material;

[0005] 3. The bonding strength of the mortar is low and does not meet the requirements

Images