Research Trend of Machine-made Sand Concrete

Research Trend of Machine-made Sand Concrete

Keywords
Machine-made Sand, manufactured sand, limestone powder, microbead powder, mineral powder, silica fume, active admixtures

Machine-made sand
The use of machine-made sand as concrete fine aggregate instead of natural sand has become a new trend in the development of the concrete industry.
However, there are the following unfavorable factors in the preparation process of machine-made sand: large specific surface area, irregular grain shape and unreasonable gradation of machine-made sand can easily lead to a large number of pore structures on the surface of cherry concrete, which also has an adverse effect on the durability of concrete.
At the same time, due to the disadvantages of high viscosity, poor construction performance, and easy blockage of pumping sand, it is imperative to study new Machine-made Sand Concrete. An active admixture is prepared from limestone powder, microbead powder, mineral powder and silica fume in a certain proportion, which can significantly improve the workability, mechanical properties and durability of machine-made sand concrete.