Preparing method for high-strength light multihole construction waste composite

Abstract

The invention discloses a preparing method for high-strength light multihole construction waste composite, which comprises the following steps: 1) smashing and sieving construction waste to acquire construction waste powder, adding water for mixing, using absolute ethyl alcohol to dilute silane coupling agent, dropwise adding the diluent to coal ash, mixing evenly, and drying for standby application; 2) dissolving epoxy resin into acetone, sequentially adding fillers including phenolic resin, stearic acid, fiber and silicone oil, mixing evenly, adding a curing agent, adding the construction waste powder step by step, and using acetone to adjust viscosity of a sizing agent so as to acquire a forming sizing agent of the construction waste composite; 3) pouring the forming sizing agent of the construction waste composite into a steel die, rising temperature, pressurizing and forming to acquire the construction waste composite. The composite adopts a multihole structure, the density is less than that of water, and the compressive strength and flexural strength are high than those of common bricks. The composite has excellent water resistance, water permeability and gas permeability, and can be used in fields, such as quake prevention of buildings, cover plates of drainage channels at towns and cities, and surface hardening of landslide zones.

Description

technical field [0001] The invention relates to a recycling of construction waste, in particular to a preparation method of a high-strength, lightweight and porous construction waste composite material. Background technique [0002] With the acceleration of urbanization in various countries, construction waste is increasing day by day, but natural resources are facing a severe form of increasing shortage. Governments of various countries have formulated new policies and developed new technologies to promote the research and application of construction waste recycling technology. According to data, it is estimated that my country will produce at least 2 billion tons of construction waste by 2020, but the current conversion rate of construction waste resources is less than 5%, which is still far behind the conversion rate of more than 90% in European and American countries. Concrete accounts for about 30-35% of construction waste, and bricks and sand account for about 40-45%. ...

AI Technical Summary

Problems solved by technology

According to data, it is estimated that my country will produce at least 2 billion tons of construction waste by 2020, but the current conversion rate of construction waste resources is less than 5%, which is still far behind the conversion rate of more than 90% in European and American countries.

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