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Microbial self-repairing concrete and preparation method thereof

A self-healing, concrete technology, applied in the field of concrete, can solve the problems of inapplicability, aerobic alkaliphilic microbial activity and easy limitation of repair ability, etc., to achieve the effect of improving stability, improving repair effect, and promoting repair effect

Inactive Publication Date: 2021-03-16
陕西恒盛混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the related technologies mentioned above, the inventor believes that the activity and repair ability of aerobic basophilic microorganisms are easily limited when anoxic, so it is not suitable for concrete in anoxic environments such as underwater

Method used

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  • Microbial self-repairing concrete and preparation method thereof
  • Microbial self-repairing concrete and preparation method thereof
  • Microbial self-repairing concrete and preparation method thereof

Examples

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Effect test

preparation example 1

[0047] A method for preparing a carrier carrying a crack repair agent and wrapping the surface, comprising the following steps:

[0048] S1. Add 5.2 g of peptone, 3.1 g of beef extract, 0.43 g of sodium bicarbonate, and 0.51 g of sodium carbonate to 1 L of distilled water in sequence, then adjust the pH to 9.5 with 1 mol / L sodium carbonate solution, and sterilize at 110°C for 45 minutes. , get the culture medium;

[0049] S2. Inoculate Bacillus pasteuri with anaerobic alkalophilic properties and the ability to synthesize carbonate with lactate as a matrix, and then put the culture medium into a constant temperature shaker, and at 28°C, Under the rotating speed of 115r / min, culture at a constant temperature for 24h to obtain a Bacillus pasteuri bacteria liquid;

[0050] S3, after the urea that accounts for 11 parts of concrete overall weight parts is added in the Bacillus Pasteurella bacterial liquid, with distilled water, the Bacillus Pasteurella bacterial liquid is diluted t...

preparation example 2

[0054] A method for preparing a carrier carrying a crack repairing agent and wrapping its surface, the difference from Preparation Example 1 is that: in step S2, Bacillus corii with aerobic and alkalophilic properties is inoculated into the culture medium, and then the cultured The base was placed in a constant temperature shaker, and incubated at a constant temperature of 28° C. at a rotational speed of 115 r / min for 24 hours to obtain a Bacillus pasteurian bacteria liquid.

preparation example 3

[0056] A method for preparing a carrier carrying a crack repairing agent and wrapping the surface is different from Preparation Example 1 in that: in step S3, after adding 11.5 parts by weight of urea to the Bacillus pasteuri bacteria liquid, the method is used in step S3. Dilute the Bacillus Pasteurella bacteria solution with distilled water to an OD600 value of 0.3 to obtain a Bacillus Pasteurella diluted bacteria solution.

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Abstract

The invention relates to the field of concrete, and particularly discloses microbial self-repairing concrete, which comprises the following components in parts by weight: 860-980 parts of coarse aggregate, 630-760 parts of fine aggregate, 320-360 parts of cement, 40-55 parts of silica fume, 140-180 parts of mineral powder, 140-160 parts of water, 7-9 parts of a sodium sulfamate water reducing agent, 11-13 parts of urea, 13-15 parts of calcium chloride, and 85-100 parts of a carrier, which is loaded with a crack repairing agent and has a coated surface, wherein the crack repairing agent is anaerobic bacillus pasteurii liquid. The microbial self-repairing concrete has the advantage that the concrete can be self-repaired after cracking in an anoxic environment.

Description

technical field [0001] The present application relates to the field of concrete, and more particularly, to a microbial self-healing concrete and a preparation method thereof. Background technique [0002] Concrete refers to a building material made of cement as the main cementing material, mixed with water, sand, stone or some necessary admixtures in proportion, stirred, compacted, and cured and hardened. Concrete will produce cracks under the action of temperature and external load, and micro-cracks can be repaired by incorporating immobilized microorganisms into the concrete. [0003] The invention patent application with the application publication number CN106045400A discloses a crack self-repairing concrete of aerobic alkaliphilic microorganisms and a preparation method thereof, the components of which are expanded perlite, cement, stone, Sand, silica fume, water, calcium lactate and water reducer. The self-healing concrete for cracks uses aerobic alkaliphilic microor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04
Inventor 王博宋心闫爱玲赵世冉王欢贾世伟
Owner 陕西恒盛混凝土有限公司
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