The difference of machine-made sand and natural sand
At present, governments in many places have successively issued relevant regulations and policies to strictly restrict or prohibit the mining of natural sand. As the contradiction between supply and demand of natural sand becomes more and more prominent, artificial sand sand emerges at the historic moment, alleviating the problem of the shortage of sand and stone to a certain extent. So how big is the gap between machine-made sand and natural sand in terms of performance, can it replace natural sand?
The application range of artificial sand sand has been expanded, from the construction industry to roads, railways, hydropower, metallurgy and other systems, from retaining projects to bridges, tunnels and hydraulic projects, and from masonry mortar to ordinary concrete and reinforced concrete. Stressed concrete, pumped concrete, airtight concrete and shotcrete anchor support projects. At present, most of the machine-made sand is used as a last resort when the supply of natural sand is insufficient or because of the economic disparity.
Comparison of artificial sand sand and natural sand
1. Robustness and durability The firmness of machine-made sand is slightly worse than that of river sand, but it still reaches the excellent product index of GB/T 141684293 standard, and there is no problem in using it in ordinary concrete. However, when used in concrete components that are often subjected to frictional impact, in addition to admixtures, the ratio of lime to sand and the crushing index of sand and the content of stone powder should be controlled.
2. The influence of machine-made sand and gravel powder content on the performance of cement mixture
Generally speaking, under the premise of the same slump, the water consumption of artificial sand sand is slightly larger, but it should be considered according to construction conditions, structures and transportation. When using machine-made sand to prepare special concrete such as pumping concrete, the sand rate should not be too high to prevent the reduction of concrete strength and durability.
In the process of project construction, sand and gravel are an important part of concrete structural materials, and their quality has a decisive influence on the quality and durability of the entire project. On the premise of meeting the performance indicators of sand, choose an economical and feasible plan, which not only meets the construction quality requirements, but also effectively controls the production cost. In this way, in areas lacking natural sand resources, the use of high-quality machine-made sand for concrete construction production is not only Feasible, its comprehensive benefits are also significant.