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Preparation method of nano attapulgite recycled concrete

A technology of recycled concrete and nano attapulgite, applied in the field of building materials, can solve problems such as insufficient strength, and achieve the effects of improving performance, reducing porosity, and reducing manufacturing costs

Pending Publication Date: 2021-12-10
HEBEI INSTITUTE OF ARCHITECTURE AND CIVIL ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects and deficiencies of the insufficient strength of the existing recycled concrete, and provide a nano-attapulgite recycled concrete that can improve the compressive strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of nano attapulgite recycled concrete, the nano attapulgite recycled concrete includes cement, nano attapulgite, natural fine aggregate, natural coarse aggregate, recycled coarse aggregate, water and additional water, wherein, 560 parts of cement, 10 parts of nano-attapulgite, 660 parts of natural fine aggregate, 770 parts of natural coarse aggregate, 330 parts of recycled coarse aggregate, 260 parts of water, and 7 parts of additional water.

[0023] The preparation method of the nano attapulgite recycled concrete comprises the following steps:

[0024] S1: Stir cement, natural fine aggregate, natural coarse aggregate and recycled coarse aggregate evenly to form a mixture;

[0025] S2: Calcining the nano-attapulgite at 500°C to activate the nano-attapulgite to make it have stronger pozzolanic activity. Add activated nano-attapulgite to water and additional water, and disperse in water for 10 minutes by mechanical stirring to form a suspension;

...

Embodiment 2

[0033] A preparation method of nano attapulgite recycled concrete, the nano attapulgite recycled concrete includes cement, nano attapulgite, natural fine aggregate, natural coarse aggregate, recycled coarse aggregate, water and additional water, wherein, 550 parts of cement, 20 parts of nano-attapulgite, 660 parts of natural fine aggregate, 550 parts of natural coarse aggregate, 550 parts of recycled coarse aggregate, 260 parts of water, and 11 parts of additional water.

[0034] The preparation method of the nano attapulgite recycled concrete comprises the following steps:

[0035] S1: Stir cement, natural fine aggregate, natural coarse aggregate and recycled coarse aggregate evenly to form a mixture;

[0036] S2: Calcining nano-attapulgite at 500°C to activate nano-attapulgite, add activated nano-attapulgite to water and additional water, and disperse in water for 10 minutes by mechanical stirring to form a suspension ;

[0037] S3: Mix and stir the mixture in step S1 and ...

Embodiment 3

[0044] A preparation method of nano attapulgite recycled concrete, the nano attapulgite recycled concrete includes cement, nano attapulgite, natural fine aggregate, natural coarse aggregate, recycled coarse aggregate, water and additional water, wherein, Among them, 530 parts of cement, 30 parts of nano-attapulgite, 660 parts of natural fine aggregate, 770 parts of natural coarse aggregate, 330 parts of recycled coarse aggregate, 260 parts of water, and 7 parts of additional water.

[0045] The preparation method of the nano attapulgite recycled concrete comprises the following steps:

[0046] S1: Stir cement, natural fine aggregate, natural coarse aggregate and recycled coarse aggregate evenly to form a mixture;

[0047] S2: Calcining nano-attapulgite at 500°C to activate nano-attapulgite, add activated nano-attapulgite to water and additional water, and disperse in water for 10 minutes by mechanical stirring to form a suspension ;

[0048]S3: Mix and stir the mixture in st...

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Abstract

The invention discloses a preparation method of nano attapulgite recycled concrete, and belongs to the field of building materials. The nano attapulgite recycled concrete is prepared from the following components in parts by weight: 520-570 parts of cement, 0-50 parts of nano attapulgite, 660 parts of natural fine aggregate, 0-1100 parts of natural coarse aggregate, 0-1100 parts of recycled coarse aggregate, 260 parts of water, and 0-20 parts of additional water. The preparation method further comprises the following steps: S1, uniformly stirring the cement, the sand and the coarse aggregate to form a mixture; S2, adding nano attapulgite into water, and dispersing the nano attapulgite in the water for 10 minutes by adopting a mechanical stirring method to form turbid liquid; and S3, uniformly mixing and stirring the step S1 and the step S2 to obtain the nano attapulgite recycled concrete. According to the invention, waste concrete blocks are crushed to partially or completely replace coarse aggregate, so that the environmental pollution caused by construction waste is solved, and the problem of over-exploitation of natural aggregate is relieved.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a method for preparing nano attapulgite recycled concrete. Background technique [0002] First of all, with the continuous development of the construction industry, a large amount of sand and gravel materials will inevitably be consumed. Due to the "over-exploitation" of natural resources, there are mainly two major problems. The first problem is that most areas lack natural aggregates, resulting in sand and gravel materials. The price of stone continues to rise; the second problem is that the mining of natural aggregates has caused certain damage to vegetation and mountains, which is a manifestation of the disharmony between man and nature. Secondly, many buildings have reached the end of their service life, and a large amount of construction waste has been generated while being demolished and rebuilt. In the past, they were disposed of by landfill or piled up in sel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/16C04B14/10
CPCC04B28/04C04B18/16C04B14/102C04B2201/50C04B14/06C04B14/04C04B20/0076Y02W30/91
Inventor 阎杰刘兴隆谢军单豆豆陆超罗岩赖镇泉
Owner HEBEI INSTITUTE OF ARCHITECTURE AND CIVIL ENGINEERING
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