Siliceous anti-cracking compacted waterproof agent for mortar concrete and preparation method thereof

Abstract

The invention discloses a siliceous anti-cracking compacted waterproof agent for mortar concrete and a preparation method thereof. The siliceous anti-cracking compacted waterproof agent is prepared from the following components in parts by weight: 10 to 15 parts of micro-silicon powder, 10 to 15 parts of activated modified nano silicon dioxide, 0.1 to 0.3 part of super-plasticizer, 0.1 to 0.3 partof viscosity reducer and 75 to 80 parts of mineral admixture; the mineral admixture is prepared from the following components in parts by weight: 36 to 42 parts of mineral powder and 38 to 45 parts of fly ash; the activated modified nano silicon dioxide is prepared from the following components in parts by weight: 70 to 75 parts of nano silicon dioxide, 0.5 to 0.7 part of silane coupling agent, 1.2 to 2 parts of isopropyl alcohol and 5 to 8 parts of caustic soda flakes. By adopting the siliceous anti-cracking compacted waterproof agent, the compactness and the permeability resistance of the concrete and a mortar material can be increased; cracks are reduced and the waterproof performance is enhanced.

Description

technical field [0001] The invention belongs to the technical field of mortar and concrete additives, in particular to a siliceous anti-cracking dense waterproofing agent for mortar concrete and a preparation method thereof. Background technique [0002] The shrinkage and cracking of cement mortar and concrete is an inherent phenomenon in the process of cement hydration and hardening. The shrinkage of cement mortar and concrete includes: subsidence shrinkage, plastic shrinkage, carbonation shrinkage, dehydration shrinkage, chemical shrinkage, etc. Subsidence shrinkage is caused by the sinking of the aggregate and the rise of excess water (bleeding). Plastic shrinkage occurs on the surface of the component, which is caused by the evaporation rate of water on the concrete surface being greater than the bleeding rate, and is related to factors such as the humidity rate of the environment, temperature, and construction. Carbonation shrinkage refers to the shrinkage of concrete ...

AI Technical Summary

Problems solved by technology

At present, the expansion agent is mostly used at home and abroad to compensate the shrinkage of concrete and mortar, but the expansion and shrinkage of concrete are not easy to control, and cracking often occurs

In addition, the concrete and mortar mixed with expansion agent are still in a state of water absorption due to the capillary pores of cement, so the impermeability of concrete and mortar is not significantly improved.