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Concrete self-repairing material, and preparation method thereof and concrete with concrete self-repairing material

A self-healing material and concrete technology, applied in chemical instruments and methods, inorganic chemistry, calcium carbonate/strontium/barium, etc., can solve problems such as poor repairing effect of concrete, improve compactness, enhance engineering durability and service life , the effect of surface enhancement

Inactive Publication Date: 2021-07-23
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to improve the defect of poor concrete repairing effect of concrete repairing materials, the application provides a concrete self-repairing material and its preparation method and concrete with it, adopting the following technical scheme:

Method used

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  • Concrete self-repairing material, and preparation method thereof and concrete with concrete self-repairing material
  • Concrete self-repairing material, and preparation method thereof and concrete with concrete self-repairing material
  • Concrete self-repairing material, and preparation method thereof and concrete with concrete self-repairing material

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0050] The high-calcium soil with a calcium content of 14,500-18,850 μg / mL was sampled in Yumen, Gansu, and the mineralized microbial strains were screened and extracted from the high-calcium soil. The microbial strains were isolated by a high-throughput microbial reaction system, and cultured on solid medium. , Obtain multiple single microbial strains, select isolated strains through the determination of mineralization product deposition, and screen out Bacillus lysinus strains.

Embodiment 1

[0053] S1, preparation of porous matrix inner core: add 0.5kg calcium chloride to 7.5kg water, stir and mix to obtain calcium chloride solution, then add 0.5kg sodium bicarbonate to 7.5kg water to obtain sodium bicarbonate solution, add to chloride respectively 1kg sodium dodecyl sulfonate and 0.3kg1000 mesh ferroferric oxide magnetic particles of equal quality are respectively added in the calcium solution and the sodium bicarbonate solution, and stirring and mixing are obtained respectively sodium bicarbonate mixed solution and calcium chloride mixed solution, and then in Under the condition of stirring at 30°C, add the calcium chloride mixture to the sodium bicarbonate mixture, let it stand for 2 hours, centrifuge and collect the lower precipitate, wash the lower precipitate with absolute ethanol, dry through a 0.5mm sieve, and prepare A porous matrix core with a porosity of 20% is obtained;

[0054] S2. Microbial load: take the Bacillus lysinus strain and enrich and cultiv...

Embodiment 2～5

[0057] Embodiments 2-5: a concrete self-repairing material, the difference from Embodiment 1 lies in that its raw material ratio is shown in Tables 2-3.

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Abstract

The invention relates to the field of building materials, and particularly discloses a concrete self-repairing material, and a preparation method thereof and concrete with the concrete self-repairing material. The concrete self-repairing material comprises a porous matrix inner core, the porous matrix inner core forms a porous structure inorganic particle, the porous structure inorganic particle is provided with a plurality of mutually communicated loading pore channels, and microorganisms are loaded in the loading pore channels; and the anti-loss coating shell is arranged on the surface of the porous matrix inner core so as to isolate the microorganisms from the external environment. According to the concrete material, inorganic particles of a porous structure serve as an inner core, the surface of the inner core is coated with a shell, mineral ions in seawater form minerals under the action of microorganisms, self-repairing of the concrete material is completed, meanwhile, the core-shell structure is adopted for preventing corrosion substances from invading, and the engineering durability and the service life of concrete preparation are improved.

Description

technical field [0001] The present application relates to the field of building materials, more specifically, it relates to a concrete self-repairing material, a preparation method thereof and concrete having the same. Background technique [0002] Cement concrete is the most common construction material in construction projects. Compared with ordinary concrete, marine concrete faces a harsher environment, and seawater contains higher concentrations of harmful ions of soluble salts, such as Cl - , SO 4 2- , CO 3 2- , Mg 2+ and Ca 2+ etc. These corrosive ions enter the matrix through the pores of the concrete, and can chemically react with some components in the cement stone to generate harmful products and cracks, which seriously affect the durability of the concrete. [0003] Since the ocean contains a large amount of chloride ions, during actual use, the chloride ions will diffuse into the concrete in the building and cause corrosion of the steel bars, thereby causi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/02C04B20/10C04B14/28C01F11/18C04B28/00C04B111/24
CPCC01F11/18C01F11/185C04B20/02C04B20/1055C04B20/1048C04B14/28C04B28/00C04B2111/24C04B2103/0001
Inventor 詹其伟王书刚
Owner JIANGSU UNIV OF SCI & TECH
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