Concrete containing machine-processed gravel powder and dust collection stone powder and preparation method thereof

Abstract

The invention discloses concrete containing machine-processed gravel powder and dust collection stone powder and a preparation method thereof. The concrete comprises cement, fly ash, the dust collection stone powder, machine-processed sand, crushed stones, water and a water reducing agent. The preparation method comprises material preparation, primary stirring and secondary stirring. By adopting good material grading, the workability of the concrete can be effectively improved; a theoretical mixing ratio design concept is adopted and the mixing ratio of the concrete is highly consistent; in a production process of the concrete, the stable quality of the concrete is ensured; the machine-processed gravel powder and the dust collection stone powder are sufficiently utilized and can replace one part of the cement, the fly ash or mineral powder, so that the dosage of a cementing material, resources are saved and the production cost of the concrete is also reduced. The machine-processed gravel powder and the dust collection stone powder are wastes generated in a sand making process of an existing aggregate plant, so that the emission of the wastes can be reduced and the environment protection is facilitated; the preparation method is simple and convenient to operate, low in cost and applicable to industrial large-scale production.

Description

technical field [0001] The invention relates to concrete, in particular to concrete containing machine-made sandstone powder and dust-collecting stone powder and a preparation method thereof. Background technique [0002] As one of the important materials in building construction, concrete has been developed for nearly 200 years and is currently the most widely used building material in the world. As an important component material of concrete, sand and gravel aggregate accounts for 70%-80% of concrete. In recent years, with the rapid development of domestic real estate market and infrastructure construction, the amount of sand and gravel aggregate has increased rapidly. As a resource, sand aggregate is non-renewable. At present, natural sand resources have been reduced or even exhausted in many areas of my country. The contradiction between supply and demand of concrete sand is prominent. In this case, the machine-made sand industry has gained With rapid development, machin...

AI Technical Summary

Problems solved by technology

For the production system of collecting pebbles and crushing sand from river channels, it is a wet production method. Generally, the stone powder in the machine-made sand is washed away by water washing, which causes environmental pollution and waste of resources, and because the machine-made sand after washing is relatively thick, When used in the production of concrete, natural sand needs to be added. In addition, after the machine-made sand is washed, the moisture content changes greatly, which makes it difficult to control the quality of concrete production.

For mine crushing and gravel sand production systems, dry production is mostly used, and then the dust collection equipment is used to collect the stone powder produced in the production process, but the treatment of the collected stone powder is another problem that plagues sand manufacturers. Most manufacturers use Landfill or other centralized treatment methods to deal with this part of the dust collection stone powder not only reduces the production efficiency but also causes the waste of resources and the impact on the environment

At present, some domestic concrete production enterprises have used unwashed machine-made sand containing stone powder in concrete production, but due to the large fluctuation of stone powder content in machine-made sand, the quality of concrete fluctuates greatly during concrete production and utilization. In addition, for dry sand making The application of the dust-collecting stone powder produced in concrete is very little

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