Hi Zachary. Thank you for your question.

One of the basic materials of modern construction project is fine aggregate, whose particle size is less than 4.75 mm. Sand originally formed by rock under natural conditions is called natural sand.

Machine-made sand is a kind of material which is selected according to national standard and meets the needs of engineering requirement. It is produced by crushing, sand-making, screening, dust-collecting and cleaning with modern production technology. Its technical indicators can not only meet the standard, but also satisfy the new quality requirements by adjusting process appropriately according to the change of sand quality requirements in engineering.

Compared with natural sand, machine-made sand has the following advantages:

1. Machine-made sand can effectively and steadily control sand particle size distribution and other technical indicators in accordance with national standards and quality requirements.

2. The machine-made sand shaped like cube have edges and corners generally, while most of the natural sand granules have become rounded. The specific surface area of machine-made sand is larger than that of natural sand, so the strength of concrete with machine-made sand is higher.

3. The production of machine-made sand can be combined with the production technology of aggregate, which is conducive to the comprehensive utilization of mineral resources and the reduction of pollution, thus greatly reducing the production cost of machine-made sand.

Liming Heavy Industry (Shanghai)