Siliceous sandstone artificial sand and preparation method thereof

Abstract

The invention provides a siliceous sandstone artificial sand and a preparation method thereof. The invention is characterized in that the siliceous sandstone artificial sand is prepared by pulverizing siliceous sandstone, of which the SiO2 content is at least 60%, the clay content is at most 2%, the density is at least 2.4 g / mm<3> and the saturated compression strength is at least 5.0 Mpa. The preparation method of the siliceous sandstone artificial sand comprises the following steps: (1) selecting materials: selecting satisfactory siliceous sandstone from sandstone: the SiO2 content is at least 60%, the density is at least 2.4 g / mm<3> and the saturated compression strength is at least 5.0 Mpa; (2) removing clay until the clay content is at most 2%; and (3) pulverizing the satisfactory siliceous sandstone to obtain the artificial sand. The invention overcomes the technical defect that people can not make machined sand to replace natural sand; in the regions with abundant siliceous sandstone resources, satisfactory siliceous sandstone (including waste siliceous sandstone in earthwork) can be made into machined sand to replace natural sand and artificial sand made of hard limestone, thereby solving the problems of natural sand / artificial sand resource shortage, high cost, difficulty in use of sand, environmental destruction and waste of energy resources in part of regions, also solving the problem of environmental pollution and destruction caused by waste slag in earthwork in part of regions and providing imponderable energy resources.

Description

[0001] technical field [0002] The invention relates to building materials, in particular to a siliceous sandstone artificial sand and a manufacturing method thereof. Background technique [0003] With the depletion of natural sand resources and the expansion of construction projects, the construction sand used as concrete aggregates has become a serious shortage. Therefore, it is imperative to find new ways to develop and produce machine-made sand to replace natural sand. At present, the raw materials of artificial sand are all hard limestone, granite, basalt, andesite, river pebbles, and smelting slag with relatively high hardness, and the above raw material resources are unevenly distributed and limited in Southwest my country. In fact, my country is one of the world's three major sandstone producing areas, and the sandstone mineral resources are very rich. The distribution of sandstone in my country is mainly distributed in the southwest region (Sichuan, Chongqing and ...

AI Technical Summary

Problems solved by technology

[0005] The existing artificial sand is mainly made of hard limestone, but hard limestone resources are limited and unevenly distributed

The mining of hard limestone will cause environmental pollution