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Method for strengthening calcium sandy soil and desert sand through novel microorganism mineralization carbonate cementing material

A cementitious material and microbial technology, applied in soil protection, construction, infrastructure engineering, etc., can solve problems such as long time period, surrounding environmental pollution, industrial cement traces in the solidified layer, etc., and achieve the goal of short time and high curing efficiency Effect

Inactive Publication Date: 2020-01-24
WENZHOU UNIVERSITY
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  • Claims
  • Application Information

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Problems solved by technology

[0002] In water and soil control, sand and dust control and reinforcement of calcareous sand have always been two very important points. Among the existing control methods, tree planting and grass are used to stabilize sand and soil, but this method takes a long time, and there is still a direct Calcareous sandy soil is reinforced with industrial cement, but the solidified layer formed by this method has obvious traces of industrial cement, which is difficult to integrate with the surrounding environment, and will also cause pollution to the surrounding environment

Method used

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  • Method for strengthening calcium sandy soil and desert sand through novel microorganism mineralization carbonate cementing material
  • Method for strengthening calcium sandy soil and desert sand through novel microorganism mineralization carbonate cementing material
  • Method for strengthening calcium sandy soil and desert sand through novel microorganism mineralization carbonate cementing material

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Embodiment 1

[0018] Embodiment 1: calcium nitrate mass proportion 1, Streptomyces flavinus mass proportion 2, foam carbon dioxide mass proportion 1 are sprayed on the desert sand to make a solution, react on the desert sand surface to form biological carbonate cement, to be reacted Freeze when finished. After the above treatment, the internal structure of the calcareous sand changed as shown in Table 1.

[0019]

[0020] Table 1 Physical properties of calcareous sand

Embodiment 2

[0021] Embodiment 2: mix with slaked lime mass proportion 1, Streptomyces flavinus mass proportion 2, foam carbon dioxide mass proportion 1, calcareous sandy soil mass proportion 10, react to form biological carbonate cement after stirring, wait for reaction to finish After solidification. refer to Figure 1-9 As shown, through the comparison before and after, it can be concluded that the mechanical properties of calcareous sand have been greatly improved in all aspects.

[0022] In order to further verify the technical effect of the new microbial mineralized carbonate cementitious material provided by the present invention for reinforcing calcareous sandy soil and desert sand, through screening, the laboratory has preserved a carbon dioxide-fixing bacterial strain with better carbon-fixing ability , using the strain and urease bacteria synergistic mineralization experiments were carried out.

[0023] At room temperature and under natural conditions, 100ml of carbon dioxide-...

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Abstract

The invention discloses a method for strengthening calcium sandy soil and desert sand through a novel microorganism mineralization carbonate cementing material. The method includes the steps that themass proportion of slaked lime or calcium nitrate is 1, the mass proportion of carbon sequestration bacteria is 2, the mass proportion of foamed carbon dioxide is 1, the mass proportion of the calciumsandy soil and / or the desert sand is 10, all the above components are mixed and reacted to form biological carbonate cement, and the biological carbonate cement is solidified after the reaction is over.

Description

technical field [0001] The invention relates to a method for reinforcing calcareous sandy soil and desert sand with a novel microbial mineralized carbonate gelling material. Background technique [0002] In water and soil control, sand and dust control and reinforcement of calcareous sand have always been two very important points. Among the existing control methods, tree planting and grass are used to stabilize sand and soil, but this method takes a long time, and there is still a direct Calcareous sandy soil is reinforced with industrial cement, but the solidified layer formed by this method has obvious traces of industrial cement, which is difficult to integrate with the surrounding environment, and will also cause pollution to the surrounding environment. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for reinforcing calcareous sand and desert sand with a new type of microbial mineralized carbonate ...

Claims

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Application Information

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IPC IPC(8): E02D3/12C04B7/345
CPCC04B7/345E02D3/12E02D3/126
Inventor 王军於孝牛符洪涛王哲王鹏袁国辉倪俊峰高紫阳叶强杨克军金锦强徐东海夏正德吕有畅管植江子武陈志坚
Owner WENZHOU UNIVERSITY