Recycled concrete with impermeability and preparation method thereof

A technology of recycled concrete and impermeability, applied in the field of concrete, can solve the problems of restricting the wide application of recycled aggregates, low impermeability and compressive strength, and large porosity, so as to reduce moisture migration, impermeability and impermeability Good compressive strength and compact structure

Active Publication Date: 2021-06-04
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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  • Recycled concrete with impermeability and preparation method thereof
  • Recycled concrete with impermeability and preparation method thereof
  • Recycled concrete with impermeability and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1-12

[0045] Embodiments 1-12 disclose a recycled concrete with impermeability, which is prepared from the components of the mass in Table 2, unit: Kg.

[0046] Cement, mineral powder, fly ash, water, recycled fine aggregate, recycled coarse aggregate, admixture.

[0047] The admixtures include polycarboxylate high-performance water reducer, stannous chloride, butyl glycol acetate and N,N-xylaniline.

[0048] Table 2

[0049]

[0050]

Embodiment 1、2

[0051] A kind of preparation method of recycled concrete with impermeability in embodiment 1,2 is:

[0052] Step 1), adding regenerated fine aggregate, regenerated coarse aggregate, fly ash, slag powder and admixture into the mixer and stirring at a speed of 20 rpm, stirring for 20s to obtain the first material preparation;

[0053] In step 2), water and cement are added to the mixer and stirred together with the first raw material at a speed of 30 rpm, and stirred for 30 seconds, and the recycled concrete with impermeability is obtained after dense molding.

Embodiment 3-12

[0054] A kind of preparation method of recycled concrete with impermeability in embodiment 3-12 is:

[0055] Step 1), adding regenerated fine aggregate, regenerated coarse aggregate, fly ash, slag powder and admixture into a mixer for stirring at a speed of 30 rpm and stirring for 40 seconds to obtain the first material preparation;

[0056]In step 2), water and cement are added into the mixer and stirred together with the first raw material at a speed of 35 rpm, and stirred for 50 seconds, and the recycled concrete with impermeability is obtained after dense molding.

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Abstract

The invention relates to the field of concrete, and particularly discloses recycled concrete with impermeability and a preparation method thereof. The recycled concrete with impermeability comprises 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 an additive; the admixture comprises a polycarboxylic acid high-performance water reducing agent, stannous chloride and ethylene glycol butyl ether acetate in a mass ratio of 1: (0.3-0.5): (0.2-0.4). The preparation method comprises the following steps: 1) stirring the regenerated fine aggregate, the regenerated coarse aggregate, the fly ash, the mineral powder and the additive at the rotating speed of 20-30 revolutions per minute for 20-40 seconds to obtain a first prepared material; 2) adding water and cement into the first prepared material to be stirred for 30-50 s at the rotating speed of 30-35 r / min, and obtaining the recycled concrete with the impermeability. The prepared recycled concrete has the advantages of being good in impermeability and high in strength.

Description

technical field [0001] The application relates to the field of concrete, more specifically, it relates to a recycled concrete with impermeability and a preparation method thereof. Background technique [0002] Recycled concrete refers to new concrete made by crushing, cleaning and grading discarded concrete blocks, mixing them with grading 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 such as sand, stone, water and other natural resources are consumed in the construction process, causing great damage to the environment, and now the replacement speed of new and old buildings is getting faster, and the old construction waste A large number of them have emerged, so in order to reduce the waste of natural resources, the country vigorously develops green projects, which makes recycled concrete gradually...

Claims

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Application Information

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Patent Type & Authority Applications(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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