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The characteristics of mechanism sand compared with natural river sand

1. appearance
Mechanism sand is the sand-gravel material obtained after professional sand making machine crushing. It has the characteristics of sharp edges, needle-like shape and roughness compared with natural river sand.
2. robustness and durability
The robustness of the mechanism sand is slightly worse than that of the river sand, but it still meets the superior product index of the GB/T141684293 standard. There is no problem in the use of ordinary concrete. However, in the concrete members that are often subjected to frictional impact, in addition to the admixture must be used, the lime-sand ratio of the concrete and the crushing index and the stone powder content of the sand should be controlled.
3. stone powder content
The powder content of the mechanism sand is a fine rock powder of less than 0.075 mm, which cannot react with the cement hydration, but it has an excellent connection with the cement crystallized stone, and has filling effect of the micro-aggregate in the internal layout.
4. adhesion and pressure resistance
The graininess of the mechanism sand is irregular. When it is bonded by a structure such as cement, it tends to have better adhesion, more compression resistance and longer service life.
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