A kind of recycled concrete with anti-permeability and preparation method thereof

Abstract

The application relates to the field of concrete, and specifically discloses a recycled concrete with impermeability and a preparation method thereof. Recycled concrete with impermeability includes the following components in parts by mass: 140-170 parts of cement; 65-95 parts of mineral powder; 80-90 parts of fly ash; 140-170 parts of water; 780-810 parts of recycled fine aggregate 1030-1070 parts of recycled coarse aggregate; 6.2-6.6 parts of admixture; said admixture includes polycarboxylate high-performance water reducer, stannous chloride, ethylene glycol butyl ether acetate and the mass ratio is 1: 0.3‑0.5: 0.2‑0.4. The preparation method is as follows: step 1), stirring regenerated fine aggregate, regenerated coarse aggregate, fly ash, mineral powder and additives together at a speed of 20-30 rpm, stirring for 20-40s to obtain the first preparation; Step 2), add water and cement to the first preparation and stir at a speed of 30-35 rpm, and stir for 30-50s to obtain recycled concrete with impermeability. The recycled concrete prepared by this application has the advantages of good impermeability and high strength.

Description

technical field [0001] The present application relates to the field of concrete, and more particularly, to a reclaimed concrete with impermeability and a preparation method thereof. Background technique [0002] Recycled concrete refers to the new concrete made by crushing, cleaning and grading waste concrete blocks, mixing them with gradation in a certain proportion, replacing part or all of natural aggregates such as sand and gravel, and then adding cement and water. [0003] With the development of the infrastructure industry, a large amount of natural materials are consumed in the construction process: sand, water and other natural resources, which have caused great damage to the environment, and now the new and old buildings are replaced at a faster rate, and the old construction waste Therefore, in order to reduce the waste of natural resources, the country vigorously develops green projects, which makes recycled concrete gradually enter the market. [0004] In view o...

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Problems solved by technology

[0004] In view of the above-mentioned related technologies, the inventor believes that compared with natural aggregates, recycled aggregates have a large porosity, and a large number of cracks are often generated inside during the crushing process. These factors make the impermeability and compressive strength of recycled concrete lower than that of natural aggregates. Concrete made of natural aggregates restricts the wide application of recycled aggregates in engineering, so there is still room for improvement

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