Sand aggregate plays a very important role in concrete. It plays a skeleton role and transmits stress. Even without cement slurry, the aggregate can support the load, inhibit shrinkage and prevent cracking. Therefore, the properties of sand and gravel aggregate, such as particle size distribution, particle shape, surface characteristics, needle and flaky particle content, void ratio and so on, which were not valued or could not be controlled in the past, are increasingly important. Sand is an important component of sand and gravel aggregate, with the following defects:
1. The particle size is not good. There are too many needle and flake shapes. There is a rock problem here, but it is mainly caused by the selection of equipment. Many small enterprises use crushers with poor particle size. If 5X series sand-making machines are selected, this problem can be completely solved.
2. The grading is unreasonable and the fineness modulus is too large. In order to reduce mechanical wear and reduce production costs, most enterprises produce machine-made sand with a fineness modulus of more than 3.0, while the fineness modulus of prepared concrete is about 2.6. In addition, the distribution area of artificial sand is better than that of zone 2, and each sieve residue must meet the standard requirements, but some enterprises do not recognize or attach importance to this indicator at all, which makes the advantages of artificial sand unable to be reflected.
3. The problem of washing away stone powder. Mud powder is harmful to concrete, and its content must be strictly controlled. In the production and use of artificial sand, attention should also be paid to soil removal, mountain skin soil and interlayer soil removal. The soil removal process must be placed before the treatment of raw materials, which can be dry sieved or washed. In the finished machine-made sand, there is no need to configure a sand-making machine, which not only avoids the mixing of soil, but also creates conditions for the retention of stone powder and reasonable grading.
Using professional sand making and crushing equipment and finding professional crusher plants are also the premise for us to successfully make sand and improve quality from the beginning. SMMVIK Machinery is one of the suppliers of professional crushing and sand making equipment. We have many years of experience in gravel sand making, and have obtained many intellectual property rights in the field of dry sand making and wet sand making. Our VSI6X sand-making machine can produce sand with good shaping effect, and can meet the requirements of the mixing station for grading, fineness modulus and other indicators. SMMVIK Machinery can provide you with professional sand making solutions to make your sand production more efficient.
