Self-restoration concrete with enhanced restoration property and preparation method thereof

A concrete and self-healing technology, applied in the field of building materials, can solve problems such as easy cracking of concrete structures, and achieve the effects of saving human and financial resources, controlling the development of cracks, and low cost

Inactive Publication Date: 2018-09-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a self-repairing concrete with enhanced repair performance and its prepara

Method used

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  • Self-restoration concrete with enhanced restoration property and preparation method thereof
  • Self-restoration concrete with enhanced restoration property and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0044] Example 1

[0045] A self-healing concrete with enhanced repair performance. In parts by weight, the raw materials include the following components: cement 176 parts, fly ash 44 parts, fine aggregate 322 parts, coarse aggregate 409 parts, water 47.3 parts, and fiber 0.585 parts , 3.325 parts of water reducing agent, 22.5 parts of expansion agent, 4.8 parts of repair materials, 9.3 parts of water storage materials.

[0046] The cement is PO42.5 grade cement. The fly ash is Class I fly ash. The fine aggregate is continuous graded medium sand. The coarse aggregate is continuous graded crushed stone with a particle size of 5mm-15mm. The fiber is cellulose fiber, the length is 2-3mm, the elastic modulus is 8-10Gpa, and the tensile strength is 800-900MPa. The water reducing agent is a mother liquor of a polycarboxylic acid water reducing agent with a solid content of 40% by weight. The expansion agent is a calcium sulfoaluminate-calcium oxide composite expansion agent. The r...

Example Embodiment

[0058] Example 2

[0059] A self-repairing concrete with enhanced repair performance. In parts by weight, the raw materials include the following components: 180 parts of cement, 46.5 parts of fly ash, 335.5 parts of fine aggregate, 426.5 parts of coarse aggregate, 48.4 parts of water, and 0.878 parts of fiber , 3.403 parts of water reducing agent, 24.75 parts of expansion agent, 4.8 parts of repair materials, 11.63 parts of water storage materials.

[0060] The cement is PO42.5 grade cement. The fly ash is Class I fly ash. The fine aggregate is continuous graded medium sand. The coarse aggregate is continuous graded crushed stone with a particle size of 5mm-15mm. The fiber is cellulose fiber, the length is 2-3mm, the elastic modulus is 8-10Gpa, and the tensile strength is 800-900MPa. The water reducing agent is a mother liquor of a polycarboxylic acid water reducing agent with a solid content of 40% by weight. The expansion agent is a calcium sulfoaluminate-calcium oxide comp...

Example Embodiment

[0072] Example 3

[0073] A self-healing concrete with enhanced repairing performance. In parts by weight, the raw materials include the following components: cement 190 parts, fly ash 49 parts, fine aggregate 349 parts, coarse aggregate 444 parts, water 49.5 parts, and fiber 1.17 parts , 3.48 parts of water reducing agent, 27 parts of expansion agent, 4.8 parts of repair materials, 13.95 parts of water storage materials.

[0074] The cement is PO42.5 grade cement. The fly ash is Class I fly ash. The fine aggregate is continuous graded medium sand. The coarse aggregate is continuous graded crushed stone with a particle size of 5mm-15mm. The fiber is cellulose fiber, the length is 2-3mm, the elastic modulus is 8-10Gpa, and the tensile strength is 800-900MPa. The water reducing agent is a mother liquor of a polycarboxylic acid water reducing agent with a solid content of 40% by weight. The expansion agent is a calcium sulfoaluminate-calcium oxide composite expansion agent. The ...

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Abstract

The invention discloses self-restoration concrete with enhanced restoration property and a preparation method thereof, and relates to the technical field of building materials. The self-restoration concrete is prepared from the following raw materials in parts by weight: 176 to 190 parts of cement, 44 to 49 parts of fly ash, 322 to 349 parts of fine aggregate, 409 to 444 parts of coarse aggregate,47.3 to 49.5 parts of water, 0.585 to 1.17 parts of fiber, 3.325 to 3.48 parts of water reduction agent, 22.5 to 27 parts of expander, 4.8 to 9.6 parts of restoration material, and 9.3 to 13.95 partsof water storage material. The self-restoration concrete has the advantages that the crack restoration ability of the self-restoration concrete is enhanced, the crack and slight damage with width ofabout 0.3 mm due to various causes can be continuously restored by self, the anti-cracking property of the self-restoration concrete is enhanced, the growth and development of the cracks are inhibited, the application range of the self-restoration concrete is expanded, and the economy of the concrete is improved.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a self-repairing concrete with enhanced repair performance and a preparation method thereof. Background technique [0002] Concrete is the largest and most widely used building material in the world today, but its brittle nature makes it easy to produce micro-cracks during construction or long-term use, providing channels for harmful ions to enter the concrete and reducing the durability of the structure. The traditional method of repairing concrete macroscopic cracks with repairing materials not only increases the cost, but also has poor effect on early cracks. In the actual concrete engineering structure, many tiny cracks occur inside the structure. If these micro-scale damages can be repaired in time and effectively before they develop into macro-cracks, it will greatly reduce the later repair or maintenance costs. Therefore, effectively repairing the cracks or losses of str...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/34
CPCC04B28/04C04B2111/343C04B18/08C04B14/06C04B14/02C04B22/002C04B16/06C04B2103/302C04B22/064C04B22/14C04B12/04C04B14/303C04B14/005C04B22/10C04B14/104
Inventor 陈连佳李静陈万昕甘振先郑钰洁吕宏鑫戚桠童
Owner SOUTH CHINA UNIV OF TECH
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