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A kind of recycled concrete and its preparation method

A technology of recycled concrete and waste concrete, applied in the field of building materials, can solve the problems of poor durability of recycled concrete, low utilization rate of waste concrete, substandard strength grade, etc. Effect

Active Publication Date: 2022-05-17
SICHUAN VOCATIONAL & TECHN COLLEGE OF COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies or defects in the above-mentioned prior art, the purpose of the present invention is to provide a recycled concrete and its preparation method, which can effectively solve the problems of low utilization rate of waste concrete, complicated process and durability of recycled concrete in the existing recycled concrete technology. Issues with poor performance and substandard strength levels

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  • A kind of recycled concrete and its preparation method

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Effect test

Embodiment 1

[0030] This embodiment 1 provides a kind of recycled concrete, including the following components by weight: PO 42.5 Portland cement 100 parts, water 60 parts, waste concrete recycled coarse aggregate 410 parts, waste concrete recycled fine aggregate 220 parts 1 part and 1 part of compound admixture;

[0031] Among them, the composite additive includes the following components by weight: 25 parts of polycarboxylate water reducer, 1 part of potassium dihydrogen phosphate, 2 parts of sodium lignosulfonate, 5 parts of modified rice husk ash, and 2 parts of viscosity modifier and 30 parts of water.

[0032] The viscosity modifier is made by mixing latex powder and hydroxyethyl cellulose in a weight ratio of 2:1.

[0033] Composite admixtures are prepared by the following methods:

[0034] Mix potassium dihydrogen phosphate and modified rice husk ash, add water, and ultrasonically disperse for 15 minutes, then add polycarboxylate water reducer, sodium lignin sulfonate and viscosi...

Embodiment 2

[0044] This embodiment 2 provides a kind of regenerated concrete and preparation method thereof, and the difference with embodiment 1 is only: the parts by weight of the components in the regenerated concrete is P.O 42.5 Portland cement 100 parts, water 56 parts , 380 parts of waste concrete recycled coarse aggregate, 196 parts of waste concrete recycled fine aggregate and 1 part of compound admixture.

Embodiment 3

[0046]This embodiment 3 provides a kind of recycled concrete and preparation method thereof, and the difference with embodiment 1 is only: the parts by weight of the components in the recycled concrete is P.O 42.5 Portland cement 100 parts, water 52 parts , 350 parts of waste concrete recycled coarse aggregate, 172 parts of waste concrete recycled fine aggregate and 1 part of compound admixture.

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Abstract

The invention discloses a recycled concrete and a preparation method thereof, belonging to the technical field of building materials, mainly comprising the following components in parts by weight: 100-120 parts of cement, 40-60 parts of water, and 270-410 parts of recycled coarse aggregate of waste concrete 111-220 parts of waste concrete recycled fine aggregate and 1-4 parts of composite admixture can effectively solve the problems of low utilization rate of waste concrete, complex process, poor durability and different strength levels of recycled concrete in existing recycled concrete technology The problem of reaching the standard, and the preparation method of the present invention has no graded crushing, the utilization rate of waste concrete recycled coarse aggregate and waste concrete recycled fine aggregate is 100%, the process is simple, and it has practical industrial application value.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a recycled concrete and a preparation method thereof. Background technique [0002] At present, with the rapid development of my country's economy, urban public and civil buildings and municipal facilities are undergoing a large number of renovations and renovations, and a large number of old buildings have been demolished, resulting in a large amount of waste concrete. On the one hand, waste concrete, as waste generated from building construction and demolition of abandoned buildings, will not only bring serious environmental problems, but also cause a huge waste of resources; Raw materials consume a lot of mineral resources, resulting in an increasing shortage of natural resources. Therefore, in order to meet the requirements of the green, energy-saving and sustainable development economic strategy and realize the sustainable development of the concrete industry, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B18/16
CPCC04B28/04C04B18/16C04B2111/00017C04B2201/50C04B22/002C04B2103/302C04B22/16C04B24/18C04B18/101C04B24/26C04B24/383Y02W30/91
Inventor 杨甲奇杨征勋霍志强杨兴胜张政李燕
Owner SICHUAN VOCATIONAL & TECHN COLLEGE OF COMM