Biological admixture for self-healing of concrete microcracks and preparation method of biological admixture

A micro-crack self-healing technology, applied in the field of biological admixtures for self-healing of concrete micro-cracks, preparation of biological admixtures, and concrete crack repair agents, can solve problems such as no guidance plan and achieve good healing , saving construction cost, easy to use

Active Publication Date: 2017-06-13
SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above technologies have not given specific guidance on how to make the admixture for self-healing of concrete micro-cracks have good healing properties so as to improve the durability of concrete engineering

Method used

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  • Biological admixture for self-healing of concrete microcracks and preparation method of biological admixture
  • Biological admixture for self-healing of concrete microcracks and preparation method of biological admixture

Examples

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Embodiment 1

[0022] Embodiment 1: the biological admixture that concrete microcrack self-healing of the present invention is made of the raw material of following component and mass fraction (mass unit can be gram): 1 part of phosphate (potassium phosphate), sulfuric acid 0.75 parts of salt (sulfate is a combination of 0.25 parts of magnesium sulfate and 0.5 parts of manganese sulfate), 0.5 parts of chloride salt (sodium chloride), 0.5 parts of citrate (sodium citrate), 3.2 parts of peptone, yeast extract (yeast paste) 1.2 parts, 1000 parts of distilled water, 2 parts of urea, 2 parts of beef extract, 10 parts of agar, 12 parts of white carbon black, 5 parts of calcium lactate, the mass percentage concentration is the sodium hydroxide (water) solution amount of 30% (can 0.01 to 0.5 parts), one branch of sporosarcina pasteurii, purchased from China General Microorganism Culture Collection and Management Center, 10 grams per branch, phosphate, sulfate, chloride, citrate , sodium hydroxide, u...

Embodiment 2

[0025] Embodiment 2: the biological admixture used for self-healing of concrete microcracks of the present invention is made from the raw materials of following components and parts by mass (parts by weight): 2 parts of phosphate (potassium dihydrogen phosphate), sulfuric acid 0.8 parts of salt (sulfate is a combination of 0.3 parts of magnesium sulfate and 0.5 parts of zinc sulfate), 0.5 parts of chloride salt (ammonium chloride), 0.8 parts of citrate (sodium citrate), 1.6 parts of peptone, yeast extract (yeast paste) 2 parts, 1000 parts of distilled water, 4 parts of urea, 2 parts of beef extract, 15 parts of agar, 14 parts of white carbon black, 4 parts of calcium lactate, mass percentage concentration is the sodium hydroxide (water) solution amount of 30%, bar One branch of sporosarcina pasteurii (purchased from China General Microorganism Culture Collection and Management Center, 10 grams per branch). Phosphate, sulfate, chloride, citrate, sodium hydroxide, urea, calcium ...

Embodiment 3

[0027] Embodiment 3: the biological admixture that concrete microcrack self-healing of the present invention is made of the raw material of following component and mass fraction (weight fraction): phosphate (dipotassium hydrogen phosphate) 1.5 parts, sulfuric acid 0.75 parts of salt (sulfate is a combination of 0.25 parts of zinc sulfate and 0.5 parts of manganese sulfate), 0.4 parts of chloride salt (ammonium chloride), 0.4 parts of citrate (sodium citrate), 0.8 parts of peptone, yeast extract (yeast paste) 1.2 parts, 500 parts of distilled water, 6 parts of urea, 2 parts of beef extract, 10 parts of agar, 10 parts of white carbon black, 3 parts of calcium lactate, mass percent concentration is the appropriate amount of sodium hydroxide (water) solution of 30%, bar One branch of sporosarcina pasteurii (purchased from China General Microorganism Culture Collection and Management Center, 10 grams per branch). Phosphate, sulfate, chloride, citrate, sodium hydroxide, urea, calciu...

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Abstract

The invention provides a biological admixture for self-healing of concrete microcracks and a preparation method of the biological admixture. The biological admixture is prepared from components and raw materials in parts by mass as follows: 0.5-3 parts of phosphate, 0.1-1.0 part of sulfate, 0.01-1.5 parts of chlorine salt, 0.25-1.2 parts of citrate, 0.5-3.2 parts of peptone, 0.2-2 parts of a yeast extract, 1,000-1,050 parts of distilled water, 0.1-10 parts of urea, 0.5-2 parts of a beef extract, 10-20 parts of agar, 10-15 parts of white carbon black, 0.1-8 parts of calcium lactate, a proper amount of sodium hydroxide solution with the mass percent concentration being 30% and a Pasteur sporosarcina strain. The invention further provides the preparation method of the biological admixture. The biological admixture has good healing performance for concrete microcracks, accordingly, the durability of concrete engineering is improved, and construction costs are saved. The biological admixture is especially applicable to concrete structures with high requirements for mechanical strength, such as roads, bridges and other major engineering.

Description

technical field [0001] The invention relates to a concrete admixture, in particular to a concrete crack repairing agent, in particular to a biological admixture for concrete micro-crack self-healing. The invention also relates to a preparation method of the biological admixture for the self-healing of concrete micro-cracks. Background technique [0002] The commonly used concrete crack repair agents on the market mainly include epoxy resin, urethane, acrylamide polymer, asphalt and silicate mortar. Most of them belong to organic substances, while concrete is inorganic substances, so the compatibility between the two is poor, and it only plays the role of filling cracks, and does not improve the mechanical properties of cracked concrete much. Portland mortar and concrete are both inorganic components, and the compatibility between the two is good, which can make up for the loss of concrete strength caused by cracks to a certain extent. However, for some small cracks, the ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38
CPCC04B40/0039C04B22/16C04B22/142C04B22/124C04B24/06C04B24/14C04B2103/0001C04B24/126C04B24/38C04B22/06C04B24/04C04B22/062
Inventor 倪涛刘昭洋夏亮亮陶俊刘翠芬
Owner SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
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