What is the definition and specification standard of mechanism sand

According to the requirements, any real sand, i.e. mixed sand, which has been de-sanded, is collectively called man-made sand. The special mechanism sand refers to the stone which is made by mechanical crushing and sieving, and its diameter is below 4.75 mm, but excluding the soft stone, weathered stone.

Nowadays, the artificial sand is basically medium-coarse sand, its fineness modulus is between 2.6-3.6, the particle grading is stable and adjustable, which also contains a certain amount of stone powder, except for the sieve residue of 150m which will be improved, the sieve residue of the other sieve residue is triangular or square rectangle, its surface is rough and sharp edges.

However, because of the differences in the production of mineral sources in different areas of our country, as well as the differences in the equipment and processes for the production and processing of mechanism sand, the particle size and grading of the produced mechanism sand may therefore vary greatly, for example, some mechanism sand has more flaky particles, and some mechanism sand has a particle grading that is big at the ends and small in the middle, but as long as it can meet all the technical specifications of the standard for man-made sand, it is able to be used in in concrete and mortar. Artificial sand that does not meet the standard can not be put into use, because the particle morphology and grading of artificial sand can be adjusted and improved, so artificial sand is still very different from natural sand in this regard. The sand mixing rate decreases with the increase of the proportion of its above characteristics.

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