The large-scale application of mechanical sand is the general trend, but the quality of finished products due to factors such as process and equipment varies greatly, and it needs to be improved from the following aspects. 1.Management of materials.
Before mining, the surface soil with materials must be removed, and there can be no cover soil, grass roots and other debris.
2.Control of particle gradation.
Due to the cumulative screening rate of 236 mm,0.The high pass rate of 075 mm leads to its unreasonable particle size and large particle size modulus, therefore, through the regulation of the particle size and fineness of the sand, the effective control of the gradation and fineness of the sand is the key to realize the gradation and fineness control of the sand.
3.The proportion of cement mortar mixed with it.
In the process of mechanical sand production, it is inevitable that there will be very small particle size less than 0075 fine-grained soil.
4.How to control the amount of cement clinker.
In order to effectively control the content of mud in the machine-made sand, a vibrating feeder is used to screen it and avoid adding mud as much as possible.
5.Control of compaction coefficients.
The crushing index of large-scale organic sand is between 20% and 25%, and its mining method is rock sand with high compressive strength and excellent texture.
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