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Method for preparing building material by complex microorganism mineralization

A technology of compound microorganisms and microbial strains is applied in the field of preparing building materials by microbial mineralization, which can solve the problems of poor volume stability and low utilization efficiency of building material products, and achieve the promotion of stable carbonate minerals and active minerals. Improved stability and environment-friendly effects

Active Publication Date: 2020-10-16
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are problems of low utilization efficiency and poor volume stability of building material products

Method used

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  • Method for preparing building material by complex microorganism mineralization
  • Method for preparing building material by complex microorganism mineralization
  • Method for preparing building material by complex microorganism mineralization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In this example, the microbial strain with the function of mineralization and deposition takes carbonic anhydrase-producing Bacillus colloid (ACCC10012) as an example, and the acid-producing bacteria adopts acetic acid bacteria (CICC 24425) that can ferment and produce acid.

[0042] The specific steps of preparing the composite microbial building material product in the present embodiment are as follows:

[0043] (1) Preparation of microbial additive A: inoculate acid-producing bacteria in the sterilized medium, each liter of medium contains 5-15 g of yeast extract, 10-20 g of agar, and 2-8 g of glucose, and then add the substrate organic The sugar content is 30-80g, placed on a shaker, and incubated at a constant temperature of 10-40°C and 50-200r / min for 6-48 hours, and the pH of the bacterial solution can be reduced to 3-6.

[0044] (2) Preparation of Microbial Additive B: Bacillus is inoculated into a sterilized liquid medium solution, and each liter of medium cont...

Embodiment 2

[0054] The microbial strains used in this example are the same as those in Example 1.

[0055] The specific steps of preparing the composite microbial building material product in the present embodiment are as follows:

[0056] (1) preparation of microbial additive A: with embodiment 1;

[0057] (2) preparation of microbial additive B: same as Example 1;

[0058] (3) Select ordinary Portland cement to prepare composite microbial cement-based material;

[0059] Add the microbial additive B to the fine powder containing calcium and magnesium minerals at a mass ratio of 1.5% of cement, and mix and stir the dry material evenly. Then mix the microbial additive A with water at a mass ratio of 5% of the fine powder, and add it to the mixed dry material. Stir evenly, and the specific ratio of cement carrying microorganism slurry: microorganism A: microorganism B: water by mass ratio is 1:0.05:0.015:0.3.

[0060] Then use it as a cementitious material, add sand at a ratio of 1:3 to ...

Embodiment 3

[0067] The microbial strains used in this example are the same as those in Example 1.

[0068] The specific steps of preparing the composite microbial building material product in the present embodiment are as follows:

[0069] (1) preparation of microbial additive A: with embodiment 1;

[0070] (2) preparation of microbial additive B: same as Example 1;

[0071] (3) Selecting steel slag with different fineness to prepare composite microbial steel slag cementitious material;

[0072] Add the microbial additive B into the fine powder containing calcium and magnesium minerals at a ratio of 2% by mass of cement, and mix and stir the dry material evenly, and then mix the microbial additive A with water at a mass ratio of 6% of the fine powder, and add it to the mixed dry material. Stir evenly, and the ratio of steel slag: microorganism A: microorganism B: water is 1:0.06:0.02:0.3 by mass.

[0073] Add sand according to the ratio of mortar to sand at 1:3 and stir evenly, as show...

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Abstract

The invention discloses a method for preparing a building material by complex microorganism mineralization. The method comprises the steps of cultivating microorganism l strains with the acid production function and microbial strains with the mineralization sediment function, and obtaining a microorganism additive; mixing the microorganism additive, mineral powder and water to be evenly stirred toobtain complex microorganism slurry; and carrying out curing forming on the complex microorganism slurry to obtain a complex microorganism building material product. Calcium magnesium mineral use rates in materials like industrial solid waste, waste concrete, cement and the like can be sufficiently used, more stable carbonate mineralization is formed, the material phase mineralization strength isimproved, and the strength and the volume stability of the building material product with complex microorganisms can be improved.

Description

technical field [0001] The invention relates to a method for preparing building materials, in particular to a method for preparing building materials by microbial mineralization. Background technique [0002] With the acceleration of the industrialization process and the accelerating pace of infrastructure construction, a large amount of solid waste will be generated in the process of industrial production and building demolition, including industrial waste residue and waste concrete. If these solid wastes are not comprehensively utilized in a reasonable way, they will inevitably cause many hazards, such as land occupation, river silting, ecological destruction, environmental pollution, and resource waste. The utilization of solid waste as a building material has a huge absorption capacity, which is an important way to reduce environmental pollution, alleviate resource shortage, and turn waste into treasure for resource utilization. However, there are problems of low utiliz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/04B28B1/093B28B13/02C04B28/00C12N1/20C12N1/16C12R1/23C12R1/085C12R1/07
CPCB28B1/045B28B1/093B28B13/0235C04B28/00C12N1/20C12N1/16C04B2103/0001Y02W30/91
Inventor 钱春香张霄
Owner SOUTHEAST UNIV
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