Manufacturing method of machine-made sand for replacing natural sand

Abstract

The invention discloses a manufacturing method of machine-made sand for replacing natural sand. The method comprises the steps of selecting dimension stone, and adding it into a crushing machine for performing preliminary crushing; adding the dimension stone obtained after preliminary crushing into a secondary crushing machine, and then performing secondary crushing; adding the stone obtained after secondary crushing into a sand manufacturing machine to perform fine crushing treatment, and performing adsorption and dust fall treatment on generated smoke through a dust collection device; adding the machine-made sand obtained after fine crushing into a screening device for screening treatment; performing powder removal treatment on the machine-made sand obtained after screening, and performing dust fall; adding a negative ion surface active agent into the machine-made sand obtained after powder removal, and performing uniform mixing treatment; obtaining finished machine-made sand. According to the manufacturing method of the machine-made sand for replacing natural sand, by adding the negative ion surface active agent into a concrete mixture, the dispersion effect on cement particles is achieved, the working performance can be improved, the unit consumption of water is reduced, and the flowability of the concrete mixture is improved; or, the unit consumption of cement is reduced, and cement is saved.

Description

technical field [0001] The invention relates to the field, in particular to a method for manufacturing machine-made sand used to replace natural sand. Background technique [0002] Natural sand is divided into river sand and sea sand. After years of mining, some areas have been exhausted or nearly exhausted, and the production of machine-made sand can reuse a large amount of waste rock resources. Therefore, machine-made sand is used instead of natural sand. Machine-made sand It refers to the sand processed by the sand making machine and other auxiliary equipment. The finished product is more regular. It can be processed into sand of different rules and sizes according to different process requirements, which can better meet the daily needs. The machine-made sand needs professional equipment to produce Qualified and suitable sand and gravel. [0003] However, when the water-binder ratio of the machine-made sand produced in the existing process is constant, if a large amount ...

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Problems solved by technology

[0003] However, when the water-binder ratio of the machine-made sand produced in the existing process is constant, if a large amount of water is used for pouring in concrete, the slump of the concrete will be too large, and pockmarks and sand grains will appear in the solid quality. , cavities and exposed steel bars, etc. If a large amount of water injection is not used, then if you want to achieve the ideal state at this time, you need to reduce the amount of admixture and increase the sand rate, which will inevitably increase the cost

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