Sand from its sources can be divided into: sea sand, river sand, mountain sand and machine-made sand. The sea sand although very clean, but high in salt, chloride ion corrosion steel case is very likely to occur in construction projects, pose a safety hazard. If you want to distinguish whether it is sea sand, sand…

In China, the full development of high-speed railway construction, led to the rapid development of many related industry chain, the mining machinery equipment factory is a exciting news. Because now the forbidden by the policy of river sand, sand and gravel aggregate used in the high-speed rail should be supported by artificial sand, high quality…