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High-performance concrete and preparation method thereof

A technology of high-performance concrete and recycled aggregate, which is applied in the field of concrete, can solve the problems of large porosity of recycled aggregate, workability of recycled concrete, impermeability, decreased strength performance, and increased performance degradation. The effect of excellent permeability

Active Publication Date: 2019-08-09
温州市三箭混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the waste concrete is crushed by external force, different degrees of fine cracks will appear inside the recycled aggregate, which will make the recycled aggregate have a large porosity and a high water absorption rate. Therefore, after the recycled aggregate replaces part of the natural aggregate, recycled concrete Workability, impermeability, strength and other aspects of performance have declined, and the performance reduction range increases with the increase of the replacement rate, which needs to be improved

Method used

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  • High-performance concrete and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] A high-performance concrete, comprising the following components by weight:

[0042] 350 parts of cement, the variety is P.O42.5;

[0043] 900 parts of coarse aggregate, the coarse aggregate includes 50% recycled aggregate and 50% crushed stone, the crushed stone is produced in Lishui Qingtian and has a continuous gradation of 5-31.5mm, the coarse aggregate of recycled aggregate primary concrete is crushed stone, The recycled aggregate is 5-31.5mm continuous gradation;

[0044] 540 parts of fine aggregate, the fine aggregate is medium sand, produced in Qingtian, Lishui;

[0045] 160 parts of water;

[0046] 190 parts of admixture, the admixture is compounded by mineral powder and fly ash with a mass ratio of 4:3;

[0047] 10 parts of admixture, the admixture is composed of expansion agent and water reducer with a mass ratio of 4:1, the model of the expansion agent is TD-AEA, and the water reducer is TD-5-3, both purchased from Shanghai Tongtai Concrete Admixtures Li...

Embodiment 2

[0059] A high-performance concrete, comprising the following components by weight:

[0060] 390 parts of cement, the variety is P.O42.5;

[0061] 1020 parts of coarse aggregate, the coarse aggregate includes 50% recycled aggregate and 50% crushed stone, the crushed stone is produced in Lishui Qingtian and has a continuous gradation of 5-31.5mm, the coarse aggregate of the recycled aggregate primary concrete is crushed stone, The recycled aggregate is 5-31.5mm continuous gradation;

[0062] 600 parts of fine aggregate, the fine aggregate is medium sand, produced in Qingtian, Lishui;

[0063] 180 parts of water;

[0064] 230 parts of admixture, the admixture is compounded by mineral powder and fly ash with a mass ratio of 4:3;

[0065] 14 parts of admixture, the admixture is composed of expansion agent and water reducer with a mass ratio of 4:1, the model of the expansion agent is TD-AEA, and the water reducer is TD-5-3, both purchased from Shanghai Tongtai Concrete Admixtur...

Embodiment 3

[0077] A high-performance concrete, comprising the following components by weight:

[0078] 370 parts of cement, the variety is P.O42.5;

[0079] 960 parts of coarse aggregate, the coarse aggregate includes 50% recycled aggregate and 50% crushed stone, the crushed stone is produced in Lishui Qingtian and has a continuous gradation of 5-31.5mm, the coarse aggregate of the recycled aggregate primary concrete is crushed stone, The recycled aggregate is 5-31.5mm continuous gradation;

[0080] 570 parts of fine aggregate, the fine aggregate is medium sand, produced in Qingtian, Lishui;

[0081] 170 parts of water;

[0082] 210 parts of admixture, the admixture is compounded by mineral powder and fly ash with a mass ratio of 4:3;

[0083] 12 parts of admixture, the admixture is composed of expansion agent and water reducer with a mass ratio of 4:1, the model of the expansion agent is TD-AEA, and the water reducer is TD-5-3, both purchased from Shanghai Tongtai Concrete Admixture...

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Abstract

The invention discloses high-performance concrete and a preparation method thereof. The high-performance concrete is prepared from, by weight, 350-390 parts of cement, 900-1020 parts of coarse aggregates, 540-600 parts of fine aggregates, 160-180 parts of water, 190-230 parts of an admixture and 10-14 parts of an additive, wherein the coarse aggregates comprise 50-70% of recycled aggregates and 30-50% of broken stone; the recycled aggregates are subjected to S1 acid treatment, S2 mortar treatment and S3 emulsion treatment in sequence. After the recycled aggregates are subjected to S1 acid treatment, S2 mortar treatment and S3 emulsion treatment in sequence, cracks are well repaired, therefore, the compressive strength and other properties of concrete prepared by using the method are closeto the properties of the concrete with natural aggregates, and the anti-penetrability performance of the concrete is even better than that of concrete without recycled aggregates.

Description

technical field [0001] The invention relates to concrete, in particular to a high-performance concrete and a preparation method thereof. Background technique [0002] Concrete refers to the collective name of engineering composite materials that are cemented together by cementitious materials and aggregates. It is often used in house construction and road construction. Generally, cement is used as the cementitious material and sand and gravel are used as aggregates. At present, when natural aggregate resources are in short supply and waste concrete is seriously polluting the urban environment, people use waste concrete to make recycled aggregate only after cracking, crushing, and screening to partially or completely replace natural aggregate to make recycled aggregate. concrete. [0003] The production of recycled concrete undoubtedly plays a beneficial role in the treatment of construction waste and the protection of the ecological environment, which is in line with the na...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B20/10C08G18/12C08G18/66C08G18/48C08G18/34C08G18/40C08G18/61
CPCC04B20/1037C04B20/107C04B28/04C04B2111/00293C04B2201/50C08G18/12C08G18/348C08G18/4009C08G18/4825C08G18/6692C04B18/08C04B18/16C04B14/02C04B14/06C04B18/12C04B2103/0068C04B2103/302C04B16/0633C08G18/61
Inventor 黄炎孝
Owner 温州市三箭混凝土有限公司
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