Sodium silicate composite self-repairing concrete structure and preparation method thereof

A technology of concrete structure and sodium silicate, which is applied in the field of sodium silicate composite self-repairing concrete structure and its preparation, can solve the problems of high repair cost, labor and material resources, and the failure of small width cracks to achieve the repair effect. Improve mechanical properties and waterproof and impermeable properties, reduce high costs, and improve durability

Inactive Publication Date: 2021-03-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Conventional methods for repairing concrete cracks include replacement concrete method, grouting plugging method and surface repair method, (Long Yun, Wang Yongyi, Cen Yuqiao, Li Minghang, Li Hetao. The main influencing factors of building concrete cracks and construction treatment technology[J]. Building Technology Development, 2020,47(17):52-53.), however, these methods are only suitable for large-width cracks visible to the naked eye, and cannot achieve the repair effect for small-width cracks that are difficult to detect, and the repair cost is very high , consume a lot of manpower and material resources

Method used

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  • Sodium silicate composite self-repairing concrete structure and preparation method thereof
  • Sodium silicate composite self-repairing concrete structure and preparation method thereof

Examples

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Embodiment 1

[0034] Such as Figure 1 ~ 2 As shown, a sodium silicate composite self-repair concrete structure comprising a concrete member 1, and a sodium silicate repair agent 2 is incorporated into a silicate repair agent 2, penetrating crystalline material 3 and PVA fiber 4.

[0035] The sodium silicate repair agent 2 is a sheet-like solid having a diameter of about 5 to 7 mm, and sodium sodium-acid repair agent 2 is a composite structure, see figure 2 The silicate repair agent 2 includes an epoxy resin layer made of an outer two layers of an epoxy resin 6 and an anhydrous silicate layer made of anhydrous silicate particles 5 between the two cyclic oxygen resin layers. .

[0036] The penetration crystalline material 3 of this embodiment employs the active silicon penetration of the active silicon produced by Guangzhou Shu Shield Waterproof Material Co., Ltd., the appearance is gray powder, the density is 2000 ~ 2100kg / m 3 .

[0037] The PVA fiber 4 of the present embodiment uses high-str...

Embodiment 2

[0039] The same is substantially the same as the examples, and the present embodiment also provides a method of preparing self-repair concrete, including steps:

[0040] Step 1: Making sodium silicate repair agents;

[0041] Step 2: Design concrete mix ratio, determine sodium silicate repair agent 2, penetrate crystalline material 3 and PVA fiber 4 duct;

[0042] Step 3: Sodium sodium sal Sodium hydrate is uniformly incorporated into the concrete in the form of a aggregate, and the permeable crystalline material 3 and the PVA fiber 4 are incorporated into concrete;

[0043] Step 4: Pour the concrete on the concrete member and maintain the shape.

[0044] In this embodiment, the specific steps of the production of sodium silicate repair agents are as follows:

[0045] Step 1.1: Scratch the transparent tape segment, soak it in an epoxy resin;

[0046] Step 1.2: Someth sodium anhydrous silicate is sprinkled on the side of the tape to adhere the epoxy resin, the thickness is about 1 m...

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Abstract

The invention discloses a sodium silicate composite self-repairing concrete structure which comprises a concrete member, and a sodium silicate repairing agent, a capillary crystalline material and PVAfibers are uniformly distributed in the concrete member. The invention also provides a preparation method of the sodium silicate composite self-repairing concrete structure. The preparation method comprises the steps: preparing the sodium silicate repairing agent; designing a concrete mixing ratio, and determining the mixing amounts of the sodium silicate repairing agent, the capillary crystalline material and the PVA fibers; and uniformly doping the sodium silicate repairing agent into concrete, and doping the capillary crystalline material and the PVA fiber cement into the concrete together. According to the invention, the mechanical property and crack resistance of the concrete structure can be improved, and the concrete structure has damage self-repairing capability, so that the safety, durability and economy of the concrete structure are improved.

Description

Technical field [0001] The present invention belongs to self-repair concrete and its similar building materials, and more particularly to a self-repairing concrete structure of sodium silicate and its preparation method thereof. Background technique [0002] The tensile performance of concrete is much smaller than the compressive performance. In normal service, cracks are inevitably generated due to factors such as environmental, temperature and fatigue injury. These cracks provide channels for external harmful substances into the concrete, exacerbated the rust of internal steel bars, reducing the safety and durability of concrete. Therefore, how to effectively repair the fine cracks in time, avoiding the development of cracks, becoming the main issues of our concern. [0003] Conventional methods of concrete crack repair include replacement concrete, grouting blockage and surface restoration, (Long Yun, Wang Yongyi, Yu Yuqiao, Li Minhang, Li Hutao. Main influencing factors and c...

Claims

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Application Information

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IPC IPC(8): C04B24/28
CPCC04B40/0039C04B24/281C04B22/02C04B12/04C04B16/0641
Inventor 马建峰李静韦欣怡涂鉴魏金沂
Owner SOUTH CHINA UNIV OF TECH
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