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 inside to observe whether it contains tiny marine shells on it.
Mountain sand due to surface roughness, so good cement adhesion effect, it is suitable as a construction sand. But it has a very complex composition, containing the majority of dirt and other organic impurities. To go through multi-processing to use, such as using Liming brand sand washing machines and other equipment.
Moderate surface roughness of river sand, contains fewer impurities can be used as building sand. But in recent years, because of man-made excavation of sand, not only led to the riverbed instability, affecting the stability of river; and cause leakage bridge foundation, the impact of the bridge and navigation safety. Also, the slag pile of garbage left over sand mining will become a new channel obstructions, which will affect the river flood and so on. Thus resulting in a large number of security risks, causing a lot of disaster.
Machine-made sand is processed by crushers and other ancillary equipment, the finished product more rules. Machine according to different requirements of raw materials processed into different rules for sand, to meet the daily needs. Sand production line combination of vibrating feeder, jaw crusher, sand making machine, vibrating screen and conveyor equipment from. Depending on the process requirements, the combination of various types of equipment to meet the different requirements of customers. It is important to select professional equipment to manufacture high-quality gravel applicable.

In the construction process, sand is an important part of the concrete structure of the material, the quality of the merits of having a decisive impact on the overall project quality and durability. Sand in meeting performance indicators under the premise, the choice of economically viable solutions necessary to meet the requirements of construction quality, but also to effectively control production costs, so using the crusher or milling machines and other equipment manufacturing quality of concrete construction sand and gravel production is not only feasible, but its overall effectiveness is significant.
Requirements for building sand, various countries in the world also have strict standards, generally are divided into finished sand level superior products, first-class products, qualified goods. Liming Heavy Industry design and manufacture of system sand gravel sand equipment in full accordance with the standard of the world-class product and high-quality, high yield for the design concept. Liming Heavy Industry glory and mission is for customers seeking the benefits, the benefit of mankind!