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A microbial composite admixture for preparing self-dredging cement-based permeable bricks

A composite admixture, permeable brick technology, applied in microorganism-based methods, microorganisms, biochemical equipment and methods, etc., can solve problems such as high cost and impracticality, and achieve excellent compressive strength, small attenuation of water permeability coefficient, and water permeability. Excellent performance

Active Publication Date: 2020-06-23
厦门美益绿建科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The recovery effect of this measure is better, but the cost is higher and it is not practical

Method used

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  • A microbial composite admixture for preparing self-dredging cement-based permeable bricks

Examples

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Comparison scheme
Effect test

Embodiment 1

[0018] The present invention provides a microbial composite admixture for preparing self-dredging cement-based permeable bricks, inoculating bacterial strains Rhodococcus erythropolis and Bacillus cohnii in the basic medium in a conventional manner, The components of the basal medium are calculated in parts by mass: beef extract 5 g, peptone 8 g, sodium bicarbonate 0.8 g, sodium chloride 1.5 g, agar 9 g, deionized water 1000 ml, and 1mol / L NaOH solution The pH value was adjusted to 9.7, and then cultured at 27° C. on a water bath shaker at a speed of 100 rpm for 24 hours. After centrifuging the obtained mixed bacterial liquid on a centrifuge at a speed of 3000 rpm for 10 min, remove the supernatant and collect the wet cells of the strain with deionized water, and control the final concentration of the bacterial liquid at 3.2×10 7 cell / mL range. Add nutritional components and auxiliary components to the mixed bacterial solution to obtain the compound admixture, the content of...

Embodiment 2

[0020] The present invention provides a microbial composite admixture for preparing self-dredging cement-based permeable bricks, inoculating bacterial strains Rhodococcus erythropolis and Bacillus cohnii in the basic medium in a conventional manner, The components of the basal medium are calculated in parts by mass: beef extract 7 g, peptone 9 g, sodium bicarbonate 0.83 g, sodium chloride 1.6 g, agar 10 g, deionized water 1000 ml, and 1mol / L NaOH solution The pH was adjusted to 10.3. Subsequently, culture was shaken at 30° C. on a water bath shaker at a speed of 120 rpm for 36 hours. Centrifuge the obtained mixed bacterial liquid on a centrifuge at a speed of 3000rpm for 20min, remove the supernatant and collect the wet cells of the strain with deionized water, and control the final concentration of the bacterial liquid at 4.1×10 7 cell / mL range. Add nutrient components and auxiliary components to the mixed bacterial solution to obtain the compound admixture, the content of...

Embodiment 3

[0022] The present invention provides a microbial composite admixture for preparing self-dredging cement-based permeable bricks, inoculating bacterial strains Rhodococcus erythropolis and Bacillus cohnii in the basic medium in a conventional manner, The components of the basal medium are calculated in parts by mass: beef extract 8 g, peptone 10 g, sodium bicarbonate 0.85 g, sodium chloride 1.8 g, agar 12 g, deionized water 1000 ml, and 1mol / L NaOH solution The pH was adjusted to 10.9. Subsequently, culture was shaken at 29° C. on a water bath shaker at a speed of 150 rpm for 48 hours. Centrifuge the obtained mixed bacterial liquid on a centrifuge at a speed of 4000rpm for 20min, remove the supernatant and collect the wet cells of the strain with deionized water, and control the final concentration of the bacterial liquid at 4.9×10 7 cell / mL range. Add nutritional components and auxiliary components to the mixed bacterial liquid to obtain the compound admixture, the content ...

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Abstract

The invention relates to a microbial composite additive for producing self-dredging cement-based permeable bricks. The microbial composite additive is prepared through mixing a mixed microbial solution, nutrient components and auxiliary components, wherein the mixed microbial solution is obtained through routinely inoculating a basic medium with target strains comprising Rhodococcus erythropolis and Bacillus cohnii, culturing the target strains and collecting mixed strain wet wells, the final concentration of the mixed microbial solution is controlled to be (3-5) * 10<7> cells / mL, the nutrient components comprise glucose, monosodium glutamate and yeast extract, and the auxiliary components comprise silica fume, a water reducer and an air entraining agent. The microbial composite additive can make up the shortcoming of easy obstruction of cement-based permeable bricks; and the self-dredging cement-based permeable bricks made by using the microbial composite additive can economically and actively avoid the agglomeration of suspending particles, sands and dusts for a long time and decompose oil stains in order to ensure the integrity of the pore structure and prolong the service life, have a good self-dredging effect, and have good environmental protection property. The addition of the microbial composite additive does not affect the integral performances of the cement-based permeable bricks.

Description

technical field [0001] The invention relates to an admixture for preparing self-dragging cement-based permeable bricks, in particular to a microbial composite admixture for preparing self-dragging cement-based permeable bricks. Background technique [0002] With the rapid development of urbanization in my country, urban waterlogging is becoming more and more frequent. Sponge city construction is a new generation of urban stormwater management concept proposed to adapt to urban environmental changes and deal with rainwater disasters. Among them, permeable brick products are a core component of sponge city construction, which have a significant effect on reducing road surface runoff, runoff pollutant load and reducing urban "heat island effect". [0003] At present, the common types of permeable bricks on the market in my country are mainly divided into resin sand-based permeable bricks, cement-based permeable bricks and ceramic sintered permeable bricks. Resin sand-based pe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00C04B28/00C04B18/14C12N1/20C12R1/01C12R1/07
CPCC04B28/00C04B40/0039C04B2103/0001C04B2111/00284C04B2201/50C12N1/20C04B18/146C04B2103/302C04B2103/304C04B14/02C04B38/00Y02W30/91
Inventor 赵明王浩任伍根伙李仰根刘文龙谢芳
Owner 厦门美益绿建科技有限公司
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