The machine-made sand is a rock particle with a particle size of 4.75mm or less, which is crushed and sieved by the sand-making equipment after soil removal treatment. At present, many parts of the country have begun to produce and use machine-made sand, industrial waste, tailings, construction waste and other wastes. Stone can also be processed into machine-made sand. In recent years, machine-made sand has become a new entrepreneurial field. What is the difference between machine-made sand and natural sand?
1. Stable supply issues
After years of mining resources, natural sand is becoming less and less, natural sand is in short supply, and prices are soaring; machine-made sand has sufficient raw materials, and various ores, construction waste, tailings, coal gangue, etc. can be used to produce machine-made sand, so it can guarantee machine-made sand The supply of natural sand is abundant and not subject to many restrictions like natural sand.　　
2. Price issues
The price of machine-made sand varies from place to place, but compared with river sand, the price is cheaper. Compared with river sand, machine-made sand can be about 20 yuan cheaper per ton. In addition, the profit of machine-made sand is considerable, with 1000 tons per day. Calculated by the scale of, the monthly profit can be about 500,000.
3. Robustness and durability
　The firmness of machine-made sand is slightly inferior to that of natural river sand, but it can still reach the national standard of *ior product index, and there will be no problems in its use in concrete.
4. Influence of machine-made sand and gravel powder content
There is not much difference between using machine-made sand to prepare concrete and natural sand to prepare concrete. Under the same slump, machine-made sand uses slightly more water than natural sand. However, factors such as construction conditions, transportation and structures be considered. The strength of concrete remains basically unchanged.
5. Good adhesion of machine-made sand
　The particle size of machine-made sand is irregular, it has better adhesion when it is bonded with cement, has stronger compression resistance, and has a service life of machine-made sand.
6. Environmental issues
With the improvement of the machine-made sand production process, the wet-process machine-made sand production basically adopts a fully enclosed structure, and the machine mouth is equipped with a water spray setting, which can ensure that dust does not overflow; while the environmentally-friendly dry-process machine-made sand production does not need water washing. There will be no feldspar dust, sewage and other problems.