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

A technology of recycled concrete and impermeability, applied in the field of concrete, can solve the problems that restrict the wide application of recycled aggregates, large porosity, low impermeability strength and compressive strength, etc., and achieve reduced water migration, compact structure, and impermeability Good performance and compressive strength

Active Publication Date: 2022-06-03
广州市长运预拌混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

Examples

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Embodiment 1-12

[0044] Examples 1-12 disclose a reclaimed concrete with impermeability, which is prepared from the components of the mass in Table 2, unit: Kg.

[0045] Cement, mineral powder, fly ash, water, recycled fine aggregate, recycled coarse aggregate, admixture.

[0046] The admixtures include polycarboxylate superplasticizer, stannous chloride, ethylene glycol butyl ether acetate and N,N-xylidine.

[0047] Table 2

[0048]

Embodiment 1、2

[0049] A kind of preparation method of regenerated concrete with impermeability in embodiment 1,2 is:

[0050] Step 1), adding the regenerated fine aggregate, regenerated coarse aggregate, fly ash, mineral powder and admixture together into the mixer for stirring, the rotating speed is 20 r / min, and stirring for 20 s to obtain the first preparation material;

[0051] Step 2), add water and cement into the mixer and mix together with the first preparation material, the rotating speed is 30 r / min, and the mixing is performed for 30 s. After compacting and molding, the recycled concrete with impermeability is obtained.

Embodiment 3-12

[0052] A kind of preparation method of regenerated concrete with impermeability in embodiment 3-12 is:

[0053] Step 1), adding the regenerated fine aggregate, regenerated coarse aggregate, fly ash, mineral powder and admixture together into the mixer for stirring, the rotating speed is 30 rpm, and stirring for 40 s to obtain the first preparation material;

[0054] Step 2), adding water and cement into the mixer and mixing with the first preparation material at a rotational speed of 35 rpm, stirring for 50 s, and obtaining impermeable recycled concrete after compacting and forming.

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B111/27
CPCC04B28/04C04B2111/27C04B2201/50C04B18/12C04B18/08C04B2103/302C04B22/12C04B24/045C04B18/16C04B24/121Y02W30/91
Inventor 陈楚彬石庆欢钟德光伍伟良
Owner 广州市长运预拌混凝土有限公司
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