Ecotype full-regeneration rapid repair concrete

A kind of concrete and ecological technology, applied in the field of building materials, can solve the problems of ineffective resource utilization of recycled powder, reduce the performance of concrete, and affect the requirements of open road traffic, etc., to achieve obvious ecological and environmental protection effects, increase consumption, stable and reliable quality control effect

Active Publication Date: 2012-12-05
汇绿园林建设发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recycled aggregates can be used to prepare recycled concrete, but the recycled powder in it cannot be effectively resourced and utilized. At the same time, the use of recycled powder alone will inevitably reduce the performance of concrete and affect the requirements for road opening to traffic. Fully recycled rapid repair concrete at a low price

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Calculated by weight components, the raw material components of the concrete in this embodiment are as follows: 390 parts of cement, 36 parts of metakaolin, 42 parts of recycled powder, quick repair agent (SBTJK-24 type of Jiangsu Subote New Material Co., Ltd. Concrete quick repair agent) 52 parts, recycled coarse aggregate 1097 parts, recycled fine aggregate 591 parts, polycarboxylate superplasticizer 10 parts, water 172 parts. The specific surface area of ​​recycled powder is 300m 2 / kg.

[0024] The preparation steps are as follows: (1) first crush and sieve the waste concrete blocks for the first time, and return the waste concrete blocks with a particle size larger than 40mm to the primary crushing and screening process, and carry out secondary crushing for the waste concrete blocks with a particle size of less than 40mm and sieving to obtain recycled powder, recycled fine aggregate and recycled coarse aggregate whose particle size and gradation meet the requireme...

Embodiment 2

[0028] Calculated by weight components, including 350 parts of cement, 30 parts of metakaolin, 60 parts of recycled powder, 60 parts of quick repair agent, 1102 parts of recycled coarse aggregate, 568 parts of recycled fine aggregate, and 7 parts of polycarboxylate superplasticizer , 190 parts of water. The specific surface area of ​​recycled powder is 400m 2 / kg. The preparation method is the same as in Example 1.

[0029] The technical indicators of the ecological fully recycled rapid repair concrete prepared in this example: 24h compressive strength is 31.7MPa, flexural tensile strength is 3.5MPa; 28d compressive strength is 49.3MPa, flexural tensile strength is 5.1MPa, 28d drying shrinkage ≤0.15‰.

Embodiment 3

[0031] Calculated by weight components, including 322 parts of cement, 28 parts of metakaolin, 64 parts of recycled powder, 46 parts of quick repair agent, 1144 parts of recycled coarse aggregate, 539 parts of recycled fine aggregate, and 5 parts of polycarboxylate superplasticizer , 207 parts of water. The specific surface area of ​​recycled powder is 550m 2 / kg. The preparation method is the same as in Example 1.

[0032] The technical indicators of the ecological fully recycled rapid repair concrete prepared in this example: 24h compressive strength is 26.7MPa, bending and tensile strength is 3.2MPa; 28d compressive strength is 38.9MPa, bending and tensile strength is 4.6MPa, 28d drying shrinkage ≤0.15‰.

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Abstract

The invention discloses an ecotype full-regeneration rapid repair concrete which is characterized in that the concrete is prepared by the following components in parts by weight: 310-400 parts of cement, 20-60 parts of metakaolin, 40-90 parts of regeneration powder, 40-80 parts of rapid repairing agent, 1050-1200 parts of regeneration coarse aggregate, 520-600 parts of regeneration fine aggregate, 5-10 parts of polycarboxylic acid water reducer and 170-220 parts of water. The ecotype full-regeneration rapid repair concrete has the advantages that waste materials are sufficiently used, energy reduction and environmental protection are achieved, the traffic is opened as soon as possible, and the cost is low.

Description

technical field [0001] The invention belongs to the field of building materials and relates to an ecological fully regenerated quick-repair concrete. Background technique [0002] Under the dual effects of traffic load and environmental factors, some slabs of cement concrete pavement are severely damaged and urgently need to be repaired or reconstructed. If it cannot be dealt with effectively in time, it will definitely affect urban traffic. [0003] Using ordinary concrete to repair damaged cement concrete pavement, the maintenance period is too long, which seriously affects the smooth flow of urban traffic, and the price of conventional cement concrete pavement rapid repair materials that can open the traffic time earlier is relatively high, which affects its popularization and use; The damaged cement concrete pavement produces a large amount of waste concrete. If it is not used rationally, it will not only cause waste of resources, but also seriously affect the local eco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/16
CPCY02W30/91
Inventor 徐亦冬钱如南
Owner 汇绿园林建设发展有限公司
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