Self-repairing material for superfine cracks of concrete and preparation method of self-repairing material

A technology of self-healing materials and fine cracks, which is applied in the field of building materials and can solve problems such as increased consistency of repair materials

Active Publication Date: 2022-03-15
江苏博思通新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Manufactured a liquid phase material composed of organic-inorganic materials to solve the problem that the repair material cannot be poured into ultra-fine cracks; use the hydration reaction between the inorganic material in the repair material and the concrete material to repair the damaged interface contact; the introduction of unsaturated Small monomers undergo oxidation-reduction reactions, and different raw materials penetrate each other to form a cross-interlocking structure, which increases the consistency of the repair material, fixes all repair materials in a specific area, and has full and long-term contact with the damaged concrete surface; through the superposition reaction of organic and inorganic materials Form a dense repair layer at both ends of the damaged material, so that the damaged crack will not continue to expand

Method used

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  • Self-repairing material for superfine cracks of concrete and preparation method of self-repairing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Preparation of component A interface enhanced self-healing agent: Dissolve 1g of acrylamide, 0.5g of sodium methacryl sulfonate and 0.05g of scallops in deionized water at 10°C and stir at 60rpm for 10min. Then add 50g of VK-S01W nano-silica transparent aqueous solution with a pH value of 6 and a silica content of 30% and 30g of a water-soluble sodium silicate with a modulus of 1.2, and stir at a stirring speed of 80rpm for 15min to obtain an interface-enhanced self- restoration agent;

[0022] 2) Preparation of curing accelerator for component B: Mix 1 g of vinyltrimethoxysilane, 30 g of methyl methacrylate and 2 g of azobisisobutyronitrile at a stirring speed of 80 rpm for 20 minutes to obtain the curing accelerator;

[0023] 3) A self-healing material for ultra-fine cracks in concrete. Mix 1g of component A interface-enhanced self-healing agent and 0.01g of component B curing accelerator at a stirring speed of 200rpm, and stir rapidly for 30 minutes to obtain a su...

Embodiment 2

[0025]1) Preparation of component A interface enhanced self-healing agent: Dissolve 0.6g N,N-dimethylacrylamide, 0.4g N-vinylformamide, 0.2g mercaptoethanol and 0.1g sodium sulfite in deionized water at 16°C and stir. The speed is 80rpm, stirring for 15min. Then add 65g of VK-S01W nano-silica transparent aqueous solution with a pH value of 6 and a silica content of 30% and 33g of a water-soluble sodium silicate with a modulus of 1.3, stirring at a speed of 60rpm for 20min to obtain an interface-enhanced self- restoration agent;

[0026] 2) Preparation of B-component curing accelerator: Mix 0.5g vinylmethyltrimethoxysilane, 0.5g vinyltriisopropoxysilane, 40g methyl methacrylate and 4g azobisisoheptanonitrile, stirring speed 60rpm, stirring for 30min to obtain the curing accelerator;

[0027] 3) A self-healing material for ultra-fine cracks in concrete. Mix 1g of A component interface-enhanced self-healing agent and 0.05g of B component curing accelerator at a stirring speed o...

Embodiment 3

[0029] 1) Preparation of component A interface enhanced self-healing agent: Dissolve 0.3g N-vinylacetamide, 0.7g isopropylacrylamide, 0.4g thioglycolic acid and 0.2g sodium bisulfite in deionized water at 25°C and stir. The speed is 80rpm, stirring for 10min. Then add 100g of VK-S01W nano-silica transparent aqueous solution with a pH value of 6 and a silica content of 10% and 30g of a water-soluble sodium silicate with a modulus of 1.2. restoration agent;

[0030] 2) Preparation of component B curing accelerator: 0.6g vinylpropyltrimethoxysilane, 0.4g vinylacetoxysilane, 60g methyl methacrylate and 6g dimethyl azobisisobutyrate were stirred The speed is 80rpm, stirring for 10min, and the curing accelerator is obtained;

[0031] 3) A self-healing material for ultra-fine cracks in concrete. Mix 1g of A-component interface-enhanced self-healing agent and 0.03g of B-component curing accelerator at a stirring speed of 300rpm, and stir rapidly for 10 minutes to obtain a super-fine...

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Abstract

The invention discloses a self-repairing material for concrete superfine cracks and a preparation method of the self-repairing material. The specific preparation method is as follows: an A component interface reinforcing self-repairing agent and a B component curing accelerator are fully stirred during use, and the self-repairing material for repairing 0.1 mm-0. 3mm cracks of concrete can be prepared. According to the invention, the adopted nano silicon dioxide and water glass material are subjected to hydration reaction with unhydrated cement particles and mineral admixtures to generate calcium silicate gel, and the calcium silicate gel and damaged concrete are fused into a whole, so that the purpose of self-repairing concrete cracks is achieved; the selected silane coupling agent enables different phase raw materials to penetrate through each other in the later curing process to form a cross interlocking structure stable system. The grouting material has the characteristics of low initial slurry viscosity, high microcrack grouting property, high bonding strength with a concrete interface, fast strength increase, no shrinkage, self-repairing, long service life, simple construction, convenient operation and the like.

Description

technical field [0001] The invention belongs to the technical application field of building materials, and relates to a self-repairing material for ultra-fine cracks in concrete and a preparation method thereof. Grouting repair materials with fine cracks of 0.1 mm to 0.3 mm appearing on the surface. The invention has low initial viscosity, can effectively reach ultra-fine cracks only through pressure injection of a grouting machine, has good groutability, is convenient to use, simple to operate, and high in construction efficiency. It has good mechanical properties, high strength in the middle and late stages, and micro-expansion. It can be used for concrete crack curing and repairing in underwater, humid and low-temperature environments. Background technique [0002] Concrete cracking is the most common form of concrete structure damage. If the cracks are not repaired in time, the concrete may be damaged from the surface to the inside, which will seriously affect the life ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26
CPCC04B28/26C04B2111/00672C04B2201/10C04B2201/50C04B24/124C04B24/16C04B24/129C04B24/045C04B24/42Y02W30/91
Inventor 胡凯伟于浩林阿真万建航
Owner 江苏博思通新材料有限公司
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