Nowadays, our country construction, speed up infrastructure construction, to the airport, railway, highway. Small to rural road construction cannot leave the sand aggregate. Sand and gravel aggregate demand increased rapidly, natural sand and gravel aggregate is limited, and mining, transportation, etc, many places are not convenient, and system of artificial sand on sand making machine…

In construction, highways, railways, bridges and water conservancy and other infrastructure, gravel aggregate is absolutely essential and can not replace, and is also the largest amount of basic materials. With the rapid development of the national infrastructure facilities and urbanization, the demand for sand and gravel for construction is in a period of rapid growth.…