Due to the gradual depletion of river sand resources and the obvious cost advantage of mechanism sand, the application of mechanism sand in high-speed rail, highway and other projects is becoming increasingly widespread.
Mechanized sand is made by crushing rocks through sand making machines and related equipment, usually containing a certain amount of clay.
In the industry, the methylene blue value (MB value) is commonly used to evaluate the clay content in sand.
Higher MB values often have adverse effects on the workability of concrete, not only damaging the internal bonding performance of concrete, but also leading to an increase in water or admixture usage.
To reduce the MB value, water washing treatment is often used, but this method can easily lead to water resource waste and environmental issues.
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