As a senior sand making machine manufacturers, Henan Kefan for you to detail the mechanism of sand, artificial sand heavy stone content requirements. In the process of production, it is inevitable to produce a part of stone powder in the production process, and the content of stone powder in the raw sand is generally as high as 10% -20% .This paper studied the effects of different stone powder contents (5%, 7%, 10%, 15%, 20% , 25%) on the performance of C30 pumping concrete, compressive strength, water pressure seepage resistance, chloride ion diffusion coefficient.The results show that in the preparation of C30 pumping mechanism sand concrete, the sand content of the stone powder By the national standard limit of 7% to 10% -15%. National standards for mb value of less than 1.4, the powder can be less than 10%! Because the stone powder on the strength of concrete, work have an impact, according to their own circumstances to control enterprises, and some 15% can also be used. So different stone content of sand production and processing equipment that need to use those sand making machine? The entire set of sand production line equipment include: jaw crusher, VSI sand making machine, sand washing machine, shaker, conveyor and other equipment. Through the research on the influence of stone powder content on the performance of C45 concrete with sand, the paper puts forward the limit scope of the mechanical sand stone powder with practical engineering value. It is of great significance to study the reasonable utilization of stone powder, Promote the development of concrete technology is of great significance.

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