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Self-repairing cement-based composite material as well as preparation method and application thereof

A composite material and self-repairing technology, which is applied in the field of building materials, can solve problems such as poor repairing effect of cracks inside concrete, difficulty in ensuring long-term activity of microorganisms, and complicated manufacturing process of microcapsule materials, so as to ensure long-term effectiveness and self-repairing effect The effect of improvement, efficiency improvement

Active Publication Date: 2021-12-17
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Each repair technology has its limitations. Electrochemical deposition and memory alloy self-repair need to provide special repair conditions, which are difficult to achieve in actual engineering; the production process of microcapsule materials is complicated and expensive
The long-term activity of microorganisms in concrete is difficult to guarantee, and the repair can only repair surface cracks, and the repair effect on internal cracks in concrete is not good
Limitations of self-healing cement-based materials limit their use in engineering

Method used

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  • Self-repairing cement-based composite material as well as preparation method and application thereof
  • Self-repairing cement-based composite material as well as preparation method and application thereof
  • Self-repairing cement-based composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] A method for preparing a self-repairing cement-based composite material, comprising the following contents:

[0066] Step 1: Prepare self-healing particles according to the preparation method in Step 1 of Example 1.

[0067] Step 2: Weighing raw materials in parts by mass, including 97.1 parts of cement matrix material, 8 parts of self-repairing particles, and 2 parts of calcium source substrate (calcium chloride).

[0068] The cement matrix material comprises the following components by weight: 30 parts of cement, 20 parts of fly ash, 25 parts of quartz sand, 1 part of PVA fiber, 1 part of water reducer, 0.1 part of thickener, and 20 parts of water.

[0069] Step 3: Put the above-mentioned weighed raw materials into the mixer, and stir them thoroughly according to the order of the preparation methods of the composite materials.

[0070] Step 4: shape the stirred material, and store it in an environment of 95% humidity and 20°C for up to 7 days.

[0071] Step 5: The p...

Embodiment 2

[0075] A method for preparing a self-repairing cement-based composite material, comprising the following contents:

[0076] Step 1: Prepare self-healing particles according to the preparation method in Step 1 of Example 1.

[0077] Step 2: Weighing raw materials in parts by mass, including 97.1 parts of cement matrix material, 12 parts of self-repairing particles, and 3 parts of calcium source substrate (calcium chloride).

[0078] The cement matrix material comprises the following components by weight: 30 parts of cement, 20 parts of fly ash, 25 parts of quartz sand, 1 part of PVA fiber, 1 part of water reducer, 0.1 part of thickener, and 20 parts of water.

[0079] Step 3: Put the above-mentioned weighed raw materials into the mixer, and stir them thoroughly according to the order of the preparation methods of the composite materials.

[0080] Step 4: shape the stirred material, and store it in an environment of 95% humidity and 20°C for up to 7 days.

[0081] Step 5: The ...

Embodiment 3

[0085] A method for preparing a self-repairing cement-based composite material, comprising the following contents:

[0086] Step 1: Prepare self-healing particles according to the preparation method in Step 1 of Example 1.

[0087] Step 2: Weighing raw materials in parts by mass, including 97.1 parts of cement matrix material, 12 parts of self-repairing particles, and 3 parts of calcium source substrate (calcium chloride).

[0088] The cement matrix material comprises the following components by weight: 30 parts of cement, 20 parts of fly ash, 25 parts of quartz sand, 1 part of PVA fiber, 1 part of water reducer, 0.1 part of thickener, and 20 parts of water.

[0089] Step 3: Put the above-mentioned weighed raw materials into the mixer, and stir them thoroughly according to the order of the preparation methods of the composite materials.

[0090] Step 4: shape the stirred material, and store it in an environment of 95% humidity and 20°C for up to 7 days.

[0091] Step 5: The ...

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Abstract

The invention relates to a self-repairing cement-based composite material as well as a preparation method and application thereof. The self-repairing cement-based composite material comprises a cement base material and a self-repairing component, wherein the cement base material comprises cement and polyvinyl alcohol fibers; the self-repairing component comprises self-repairing particles and a calcium source substrate; the self-repairing particle is composed of a porous carrier, an internal component and an outer protective wall; and the internal component is carbonate, the internal component is loaded on the porous carrier, and the outer protective wall is coated on the outer surface of the porous carrier. The self-repairing speed, efficiency and self-repairing effect are improved. The durability of the cement-based material can be improved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a self-repairing cement-based composite material, a preparation method and an application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The mileage of operating tunnels in my country is gradually increasing, but water leakage, lining cracking, and damage are common in tunnel linings, which bring great safety hazards to tunnel operations. The damage of the tunnel lining structure is slow and continuous. After the repair of the tunnel structure in operation, the repair materials face the risk of damage caused by factors such as structural stress and def...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B16/06C04B20/12C04B111/72C04B14/18
CPCC04B28/04C04B16/0641C04B20/12C04B2111/72C04B2111/00724C04B18/08C04B14/06C04B2103/302C04B2103/44C04B14/185C04B22/124C04B20/107C04B20/1033C04B20/1077Y02P40/10
Inventor 刘人太张春雨陈孟军李修浩刘衍凯闫佳马晨阳范奉帅
Owner SHANDONG UNIV
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