A high-strength anti-shrinkage concrete interface treatment agent

Abstract

The invention discloses a high-strength anti-shrinkage concrete interface treating agent, comprising the following components according to percent by weight: 23-32% of pulverized coal ash, 10-20% of quartz sand, 15-23% of ordinary Portland cement, 18-25% of sulphoaluminate quick-setting cement, 1.2-2.5% of polycarboxylate superplasticizer, 1.2-2.5% of latex powder, 0.3-0.6% of hydroxypropyl methyl cellulose, 5.0-8.0% of silica fume, 6.0-9.0% of heavy calcium carbonate powder, and 1.0-3.0% of calcium stearate waterproof agent.The concrete interface treating agent developed herein has good bonding performance and other comprehensive performances; before plastering, the surface of concrete is treated with the agent instead of traditional roughening, so that it is possible to improve construction efficiency, simplify maintenance conditions, shorten the construction period and improve project quality; the interface treating agent is useful in concrete surface repairing and concrete product surface treatment and is also useful in the pretreatment of bonding surfaces of various decorating materials and insulating materials.

Description

technical field [0001] The invention relates to a high-strength anti-shrinkage concrete interface treatment agent. Background technique [0002] The development of new wall materials and cast-in-place concrete technology has led to a greater focus on the quality and durability of buildings. Because it is necessary to brush release agent and other materials on the formwork before pouring concrete, the concrete surface after demoulding will be stained with a layer of release agent, which greatly affects the bond strength between concrete and plastering mortar. Many projects adopt concrete shear wall or slip form construction, and the formwork is mostly smooth steel formwork or bamboo formwork. The concrete surface is dense and smooth, and the ability of the cement mortar plastering layer to bond to it is greatly reduced. New wall materials such as fly ash bricks and small concrete blocks produced by using the three wastes, due to their high water absorption and large volume c...

AI Technical Summary

Problems solved by technology

For the moisture saturated interface, it is easy to form moisture concentration at the interface when it is combined with the repair material, thereby reducing the interface bonding strength.