Processing system and construction method capable of improving fineness modulus of natural sand

Abstract

The invention discloses a processing system and a construction method capable of improving the fineness modulus of natural sand. The advantage of high fine aggregate content of a natural river bed is fully utilized, and a vertical-axis impact crusher is selected to process small stones into artificial sand with high fineness modulus, so that the shortcomings of low natural sand content and low fineness modulus are compensated and overcome, the yield and production quality of the sand are improved, and the running cost of the whole system is also lowered. The system and the method are particularly applied to the working conditions of low fineness modulus, low natural sand content and high fine aggregate content of natural grits mined underwater.

Description

technical field [0001] The invention belongs to a processing system and a construction method for improving the fineness modulus of natural sand, and is especially suitable for working conditions where the fineness modulus of natural sand and gravel materials in underwater mining is relatively small, and the content of natural sand is insufficient and the fine aggregate is too much . Background technique [0002] Fineness modulus is an important index to measure the quality of sand, which directly affects the workability, strength, impermeability and durability of concrete. The existing construction code requires the fineness modulus of sand to be 2.4 to 2.8. [0003] Restricted by natural conditions, the natural sand and gravel materials in some natural riverbeds of inland rivers contain too much fine aggregate, the sand content of natural sand is insufficient, and the fineness modulus of sand is less than 2.0. The natural sand gradation and demand for direct screening and...

AI Technical Summary

Problems solved by technology

[0003] Restricted by natural conditions, the natural sand and gravel materials in some natural riverbeds of inland rivers contain too much fine aggregate, the sand content of natural sand is insufficient, and the fineness modulus of sand is less than 2.0. The natural sand gradation and demand for direct screening and washing are based on Cannot meet construction requirements

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