Composite isolation protective sand and preparation method

Abstract

The invention discloses composite isolation protective sand which is of a multi-layer coating structure and sequentially comprises aggregate, a transition layer, a functional shell layer and a surface protective layer from inside to outside. The transition layer, the functional shell layer and the surface protective layer are arranged on the outer surfaces of the mineral particles, so that the problems that the natural mineral particles are poor in cohesiveness with a bonding layer and post-pouring concrete, the isolation protection effect on the bonding layer is poor, the hardness is high, edges and corners are clear, a main body reinforcing layer is prone to being rolled and damaged and the like can be effectively solved. The composite isolation protective sand is high in production efficiency and relatively low in production energy consumption, meanwhile, the composite isolation protective sand is endowed with excellent water resistance, weather resistance, aging resistance and ultraviolet resistance, and secondary dust is prevented from being generated in the transportation and use process.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a composite isolation protection sand and a preparation method thereof. Background technique [0002] Looking at domestic and foreign markets, the current basic structure of pre-paved waterproofing membranes includes: a main reinforcement layer, an adhesive layer, and a surface isolation protective layer. The layer includes natural mineral particles, artificial synthetic sand, etc. Common natural mineral particles include quartz sand, etc., while common artificial synthetic sand includes mullite sand, ceramic sand, corundum, etc. The main technical defects of natural mineral particles such as quartz sand include: poor adhesion to the bonding layer and post-cast concrete, poor isolation and protection effect on the bonding layer, high hardness, sharp edges and corners, easy to crush the main reinforcement layer, etc. The main technical defects of artificial synthetic sand such a...

AI Technical Summary

Problems solved by technology

The main technical defects of natural mineral particles such as quartz sand include: poor adhesion with the bonding layer and post-cast concrete, poor isolation and protection effect on the bonding layer and high hardness, sharp edges and corners, easy to crush the main reinforcing layer, etc.

The main technical defects of artificial synthetic sand such as mullite include: high manufacturing cost, low production efficiency, high production energy consumption, many by-product solid wastes, and difficult disposal, etc.