A kind of composite toughening pouring mortar and preparation method thereof

Abstract

The invention discloses a composite toughening pouring mortar, which comprises the following components in parts by weight: 80-100 parts of cement, 120-180 parts of fine sand of 50-200 mesh, 20-50 parts of water, and 5-5 parts of epoxy resin emulsion 10 parts, 10-15 parts of toughened composite material, 1.5-6 parts of early strength agent, 0.9-2.4 parts of water reducing agent, 2-3 parts of lignin, 2-3 parts of triethanolamine, 1-1.5 parts of sodium silicate and 20‑30 parts of fly ash, wherein the toughened composite material is composed of X component boron nitride additive material and Y component boron nitride additive material; X component boron nitride additive material is composed of activated boron nitride additive material Dissolved in the organic solvent M under the action of the initiator, and react with the monomer compound, ethanol and distilled water; the boron nitride additive material of the Y component reacts with the trifunctional organic compound sequentially from the activated boron nitride , and polyvinylpyrrolidone nucleophilic substitution reaction in the system. Composite toughened mortar uses boron nitride as the base material to form a high-performance additive material for mortar, which has good engineering application value.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a composite toughened pouring mortar and a preparation method thereof. Background technique [0002] At present, there are two main types of grouting cement mortars that are widely used: one is epoxy resin grouting cement mortar, and the other is polyurethane grouting cement mortar. However, the toughness of the single epoxy resin grouting cement mortar is poor, and the strength of the single polyurethane grouting cement mortar is not enough. Therefore, developing a high-performance pouring mortar is an urgent problem in construction engineering. [0003] Epoxy resin has many advantages, such as excellent chemical stability, corrosion resistance, electrical insulation and low shrinkage, etc. However, after curing, a single epoxy resin has a high crosslinking density, a three-dimensional network structure, and large internal stress. , brittle, poor impact resistance...

AI Technical Summary

Problems solved by technology

[0003] Epoxy resin has many advantages, such as excellent chemical stability, corrosion resistance, electrical insulation and low shrinkage, etc. However, after curing, a single epoxy resin has a high crosslinking density, a three-dimensional network structure, and large internal stress. , brittle, poor impact resistance, easy to crack and other shortcomings, it is difficult to meet the engineering technical requirements of mortar toughening, so its application is limited to a certain extent, so how to toughen and modify epoxy resin pouring mortar has become a challenge in this field The essential