Method for manufacturing high-quality reclaimed sandstone aggregate by modifying construction waste particle materials

Abstract

The invention relates to a method for manufacturing high-quality reclaimed sandstone aggregate by modifying construction waste particle materials. The method comprises the following steps: modifying the crushed construction waste particle materials with a size less than or equal to 35 mm in a modifier through alternated mechanical grinding and physical disintegration, removing defects of soft structures, sharp corner angles, debris and cracks from the surfaces of the construction waste particle materials to form modified sand, stone and fine materials of construction waste, and performing separation to form the high-quality reclaimed sandstone aggregate. The method can meet requirements of the construction industry on the high-strength and high-performance reclaimed aggregate and achieve recycling of construction waste materials, and is low in investment and cost, environmentally friendly and energy-saving.

Description

technical field [0001] The invention relates to the technical field of environmental protection, waste resource recycling, and in particular to a method for preparing high-quality regenerated sand and gravel by correcting construction waste granular materials. Background technique [0002] The scale of my country's infrastructure is huge, and the construction of a huge amount of engineering throughout the country requires a huge amount of inorganic building materials. As we all know, these inorganic building materials, especially concrete, mortar, and cement bricks that are widely used, are the basic production materials of cement (gelled Materials), sand, and / or stone are three major raw materials, which are composite building materials that use cement cementitious materials to cement and solidify sand and stone together. On the one hand, the mining and supply of sand and stone raw materials, which require a huge amount of demand for large-scale infrastructure construction, ...

AI Technical Summary

Problems solved by technology

[0008] Although the above-mentioned method can obtain high-quality regenerated sand and gravel aggregates, the above-mentioned method still has the following problems: one requires heat treatment, which consumes energy and causes air pollution by burning, and the other needs to be ground with a ball mill with high energy consumption and low heat rate. High energy consumption, low efficiency, secondary pollution, and large investment are not suitable for low-investment and low-cost local centralized treatment of construction waste with a wide volume and area, and it is difficult to obtain clean and high-quality recycled sand without structural defects stone aggregate

[0009] At present, there is no new low-investment, low-energy-consumption method for resource recycling of various components of construction waste and obtaining clean recycled sand and gravel aggregates without structural defects.