Method for increasing fluidity of concrete by using stone chip and machine-made sand compound addition technology

Abstract

The invention discloses a method for increasing fluidity of concrete by using a stone chip and machine-made sand compound addition technology, and the method comprises the following steps: step one, stone chips and machine-made sand in a stone factory are compounded and mixed in a certain proportion, so that stone powder content in mixed sand meets stone powder content requirements in '' ordinary concrete used sand, stone quality and inspection method standard'' JGJ52-2006 standard; step two, the mixed sand is used for cement machine-made sand fluidity tests for testing the fluidity, a fluidity of greater than or equal to 200mm of the cement machine-made sand discharged from a machine can be ensured, and a fluidity of greater than or equal to 180mm of the cement machine-made sand 1 h after discharged from the machine can be ensured; and step three, concrete optimum is performed, and the fluidity of the concrete can be adjusted by an additive. According to the method, the stone chips and the machine-made sand are compounded, the additive is used for regulation of concrete workability and increasing of the fluidity of the concrete, the problem of poor fluidity of the machine-made sand concrete can be solved, the construction quality is ensured, and the construction cost is reduced.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to the field of construction where the fluidity of machine-made sand concrete is poor in areas where river sand is exhausted or without river sand, and in particular relates to a method for increasing the fluidity of concrete by using stone chips and machine-made sand mixed technology. Background technique [0002] After years of continuous mining, natural sand resources are rapidly decreasing. In some areas, natural sand has been exhausted or nearly exhausted. In some areas and rivers, in order to maintain natural scenery, protect river embankments and dams, and protect ecological balance, mining is strictly prohibited. Due to these reasons, the cost of natural sand is getting higher and higher, and the market is getting smaller and smaller. Therefore, machine-made sand is becoming more and more popular in the market. However, machine-made sand has the characteristics...

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Problems solved by technology

[0012] The technical problem to be solved by the present invention is to provide an easy-to-implement method of increasing the fluidity of concrete by using stone chips and machine-made sand mixed technology. This method solves the problem of poor fluidity of machine-made sand concrete

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