Concrete crack self-repairing agent as well as preparation method and application thereof

A concrete and self-repairing technology, which is applied in the field of concrete crack repair, can solve the problems of non-destructive micro-cracks, relatively little research on the evaluation method of self-repair effect of electrodeposition method, and creep, so as to improve the density of slurry and self-repair Good repair effect and improved compressive strength
CN114751675AActive Publication Date: 2022-07-15SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
Publication Date
2022-07-15

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Abstract

The invention discloses a concrete crack self-repairing agent which is mainly composed of a liquid raw material A and a solid raw material B. The liquid raw material A comprises the following specific components in parts by weight: 10-25 parts of chitosan, 20-50 parts of cellulose fiber and 10-25 parts of epoxypropane; the solid raw material B comprises the following specific components in parts by weight: 100-200 parts of calcium oxide, 10-25 parts of bauxite, 20-40 parts of metakaolin, 5-10 parts of calcium carbonate, 100-150 parts of an expanding agent and sufficient water. The concrete crack self-repairing agent provided by the invention is doped, so that the compressive strength of concrete is improved, the compressive strength after crack repairing is higher than that before crack prefabrication, the compressive strength after concrete crack repairing is improved, the strength recovery rate is relatively good and can reach 155%, the crack repairing effect is relatively good, and the cracks are completely healed; the self-repairing effect is good; and after being added into concrete, the anti-freezing agent can improve the compactness of slurry, reduce holes, has better compatibility with a matrix, is beneficial to crack repair, obviously improves the freezing resistance, has a good application prospect, and is suitable for wide popularization and application.
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Description

technical field

[0001] The invention relates to the technical field of concrete crack repair, in particular to a concrete crack self-repairing agent and a preparation method and application thereof. Background technique

[0002] As a micro-porous brittle material, concrete is easily affected by external conditions such as external load and temperature, resulting in different degrees of micro-cracks and local damage. Micro-cracks in concrete will affect the durability and noise of components, thus affecting the service performance of concrete components. On the one hand, it is difficult to detect micro-cracks non-destructively and accurately with the existing technologies, and it is also difficult to repair internal micro-cracks by conventional methods. On the other hand, the self-healing phenomenon of concrete micro-cracks has been observed in natural environment for many years due to the formation of calcium carbonate and continuous hydration of anhydrous cement materials,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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