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Method and structure for connection anchoring of longitudinal steel bars of concrete member by microbe grouting

A technology of longitudinal reinforcement and concrete, which is applied in the direction of building structure and construction, can solve the problems of hidden quality, difficult inspection of grouting compactness, complicated construction technology, etc., and achieve the effect of good filling, good durability and guaranteed mechanical properties

Inactive Publication Date: 2019-05-21
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the construction process of these two methods is complicated, and the compactness of grouting is not easy to test, which is likely to become a quality hidden danger.

Method used

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  • Method and structure for connection anchoring of longitudinal steel bars of concrete member by microbe grouting
  • Method and structure for connection anchoring of longitudinal steel bars of concrete member by microbe grouting
  • Method and structure for connection anchoring of longitudinal steel bars of concrete member by microbe grouting

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preparation example Construction

[0061] 2. Preparation of grouting fluid

[0062] In this embodiment, the test results in the patent 201510113200.2 are used to determine the types and concentrations of the calcium source solution, the nutrient solution and the bacterial solution, because the types and concentrations of the source solution, the nutrient solution and the bacterial solution provided by this patent not only effectively increase the carbonic acid The total output of calcium deposits, and can effectively increase the early output of deposits, which is of great significance for the use of grouting methods to seal concrete cracks. Only when a large amount of calcium carbonate precipitation is produced in a short period of time can concrete cracks be blocked in a short period of time. Therefore, the amount and frequency of grouting can be reduced.

[0063] Specifically, the calcium source solution described in this embodiment selects calcium nitrate (Ca(NO 3 ) 2 ) solution or calcium acetate (Ca(CH ...

Embodiment 2

[0080] The present invention also provides a concrete structure obtained by the method described in Example 1, where the concrete structure includes various concrete buildings.

[0081] The microbial grouting product in the present invention is calcium carbonate, which has the same composition as concrete and has good compatibility. This material is a liquid with very low viscosity before curing, and can penetrate deep into concrete cracks with the help of negative pressure. The resulting calcium carbonate is solid, which can play a very good role in filling and bonding, and avoid the volume of grouting materials such as cement mortar. The disadvantages of shrinkage and inability to enter the depth of the channel. Compared with epoxy organic anchoring materials, it is non-toxic, durable, and will not soften under high temperature. It can well guarantee the mechanical properties of the assembled monolithic concrete member.

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Abstract

The invention discloses a method and a structure for connection anchoring of longitudinal steel bars of a concrete member by microbe grouting. The method comprises the following steps: step 1, manufacturing the concrete member; step 2, preparing a grouting liquid which comprises a calcium source solution, a nutritive salt solution and a bacterium solution, wherein the volume ratio of the calcium source solution to a mixed solution of the nutritive salt solution and the bacterium solution is (1-3):(1-4); step 4, splicing the concrete member; after the lower concrete member is mounted and the vertical steel bars of a lower concrete member are connected and anchored, penetrating a sealing gasket into the top of a reinforcing steel bar of the lower concrete member, placing an upper concrete member right above the lower concrete member, penetrating the top of a reinforcing steel bar of the lower concrete member into the hole of the upper concrete member, and sealing the bottom of the hole of the upper concrete member by the sealing gasket; and step 5, carrying out grouting and anchoring.

Description

technical field [0001] The present invention relates to a method for connecting longitudinal steel bars of assembled integral concrete members and a concrete structure obtained by the method, in particular to a method for connecting longitudinal steel bars of assembled integral concrete members by microbial grouting anchorage and the method obtained by the method concrete structure. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] The assembled integral concrete structure has a high level of industrialization, is convenient for winter construction, reduces the amount of wet work on site, reduces waste of materials, reduces dust and noise on the construction site, so as to achieve the purpose of improving construction quality, increasing production efficiency, saving energy and reducing emissions, and protecting the environment. In order to ensure t...

Claims

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Application Information

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IPC IPC(8): E04B1/21
Inventor 贾强张鑫
Owner SHANDONG JIANZHU UNIV
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