River pebbles as a kind of natural stone, taken from the sand experienced the crustal movement of millions of years ago by the ancient river bed uplift in the mountains, experiencing the impact of flash floods, water handling process of extrusion, friction. In the evolution of tens of thousands of years of vicissitudes, they tormented and waves of movement of the water will be gravel collision friction lose the irregular edges, and sediment in a deep underground over millions of years of silence. Cobblestone main chemical composition is silicon dioxide, followed by a small amount of iron oxide and small amounts of manganese, copper, aluminum, magnesium and other elements and compounds, hard, quality and compression, wear corrosion-resistant natural stone features, is an ideal building materials.

Many Vietnamese river, river gravel reserves is very rich, usually a county within the region, river pebbles slightly rich reserves can be billions of parties. The current situation is, in most parts of river sand and gravel resource development, is currently limited to the exploitation of river sand. River gravel crushing, grading comprehensive utilization has not been fully realized. With the investment in infrastructure projects, construction of concrete aggregate demand increasing, mainly used in the construction market is a jungle fried stone gravel, this type of construction materials had to spend the breaking way from the mountain mining, mining gravel not only destroyed the mountain landscape and lead to soil erosion, while the breaking process has brought a lot of security risks and damage to the ecology. River gravel is an excellent source of building sand, artificial sand production of materials, broken river pebbles are relatively inexpensive, the price per cubic meter of about $ 10 cheaper than the gravel, the obvious advantages of competition in the market.

River gravel crusher as concrete aggregate, in the field of building materials market has a certain history and was widely promoted, its main purpose is the level of stability in two areas: civil engineering, concrete aggregate and road construction material. The current economy is relatively backward areas, river pebbles storage is usually rich, and the exploitation of low-cost, behind the huge potential for economic development, revealing a huge demand for sand and gravel produced by river gravel construction aggregate because of cheap replace the gravel aggregate is very optimistic about the prospects for the market will gradually form a new investment hot spot.

Investment in a modern building river gravel aggregate production line is not complicated, the main device is a sand making machine, according to production requirements, with appropriate pre-crushing equipment and ancillary screening equipment. Shanghai Kefid Machinery specializing in the production of river gravel Sand, installation and commissioning of the thousands of sand and gravel production line has been successful for many domestic and foreign river gravel, sand production enterprises, R & D and production of PCL series of traditional sand making machine, VSI series Sand and the latest 5X series sand making equipment for its stable and reliable product performance and professional and attentive service has customers for sure. Choice of profession, it means that has been successfully took a big step. Shanghai Kefid Machinery Sand, professional and trustworthy!