Method for synergistically enhancing strength of recycled concrete aggregate by composite microorganisms

A technology of recycled concrete and composite microorganisms is applied in the field of composite microorganisms to synergistically enhance the strength of recycled concrete aggregates.

Inactive Publication Date: 2018-11-06
WENZHOU UNIVERSITY
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  • Abstract
  • Description
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Problems solved by technology

[0002] In traditional recycled aggregate thermal insulation walls, cement mortar is used to mix recycled material aggregates to fill the interior of the thermal insulation wall. Since the particl

Method used

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Embodiment Construction

[0010] The invention discloses a method for composite microorganisms to synergistically enhance the strength of recycled concrete aggregates, comprising the following steps:

[0011] A, hydrolyzing urea with bacillus pasteurianum to generate carbonate, hydrolyzing organophosphate monoester with bacillus subtilis to generate phosphate ion, and making the two kinds of solutions into microbial composite bacterial liquid a;

[0012] B, put the regenerated concrete aggregate into the compound bacteria liquid a and soak for 6-12 hours;

[0013] C. After adding equimolar calcium ions to react, a large amount of precipitation will be produced immediately, and finally calcium carbonate and hydroxyapatite composite cementitious material will be generated to fill the pores of recycled concrete aggregate;

[0014] D. Mix the microbial composite solution a, equimolar calcium ions and cement mortar, and then mix the mixture with the recycled concrete aggregate treated in step C.

[0015] T...

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Abstract

The invention discloses a method for synergistically enhancing the strength of a recycled concrete aggregate by composite microorganisms. The method comprises: A, hydrolyzing urea through Bacillus pasteurii to obtain carbonate, hydrolyzing an organic phosphate monoester through bacillus subtilis to obtain phosphate ions and preparing a microorganism composite bacterial solution a from the two solutions, B, immersing a recycled concrete aggregate in the composite bacterial solution a, C, adding equimolar calcium ions into the solution for a reaction to obtain a calcium carbonate-hydroxyapatitecomposite gel material, and D, mixing the composite bacterial solution a, the equimolar calcium ions and cement mortar and mixing the mixture and the recycled concrete aggregate. After mixing of the composite bacterial solution a, the produced hydroxyapatite and calcium carbonate fill gaps of the recycled concrete aggregate. In the growth and reproduction of Bacillus pasteurii, urease is producedand fast hydrolyzes the urea into carbonate and ammonium ions and the ions are bonded to calcium ions so that calcium carbonate gel is produced. The bacillus subtilis produces alkaline phosphatase inthe growth and reproduction and the alkaline phosphatase hydrolyzes the organic phosphate monoester so that phosphate ions are obtained. The method can effectively strengthen the recycled concrete aggregate.

Description

technical field [0001] The invention relates to a method for synergistically enhancing the strength of recycled concrete aggregates by compound microorganisms. Background technique [0002] In the traditional recycled aggregate thermal insulation wall, cement mortar is used to mix the recycled material aggregate to fill the interior of the thermal insulation wall. Since the particle size of the recycled aggregate is not uniform, and the strength of the material is not as good as that of the new material, how to strengthen its structural strength is a difficult problem in the industry. . Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for synergistically enhancing the strength of recycled concrete aggregates by compound microorganisms, which can enhance the strength of recycled concrete aggregates in a more environmentally friendly manner. [0004] For this reason, the method that composite microorganism...

Claims

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Application Information

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IPC IPC(8): C04B20/02C04B18/16
CPCC04B20/02C04B18/16Y02W30/91
Inventor 於孝牛余闯钱春香蔡晓庆高燕
Owner WENZHOU UNIVERSITY
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