Concrete refers to buliding material that cement as gelling material, sand and gravel as aggregates,and with water by a certain percentage, by mixing, forming, curing obtained.It has the features of abundant raw materials, low prices,simple  production process, high compressive strength, durability,etc. It is one of the most important civil engineering materials with large use and wide range of applications.

                                                                                              

 

Cement, sand (fine aggregate), gravel (coarse aggregate) is the basic material of concrete. Sand has been used in ordinary concrete, reinforced concrete, prestressed concrete, pumping concrete, air tightness concrete and other projects.It is the essential raw material for concrete production.

 

Currently, due to the increasingly tense supply and demand of natural sand resources and increasingly demanding for concrete's compressive strength, durability, mechanism sand became more widely instead of natural sand to be used in the production of concrete.

 

VSI sand making machine is the latest sand equipment developed by Kefid which specialized in applications for mechanism sand, introducing the latest German technology and combined with its own technology. It combines three crushing modes in one and has the extraordinary effect in crushing and shaping limestone, pebbles, river gravel, granite, basalt, perlite, sand tailings and other raw materials.

 

Currently, Kefid VSI series sand making machine has become the core equipment in sand industry.It not only has high efficiency, large capacity, advanced energy-saving, but also has perfect grain shape of finished sand product, with reasonable grading and less mud.In concrete configuration,it can be achieved effects of progressively reach filling, reduced porosity which can effectively save the blending amount of cement to reduce production costs. Furthermore, the density of concrete greatly improved. The compressive strength and durability also greatly enhanced. The concrete achieve better application result in various construction projects.