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Manufacturing method for bacterial slime-based coating material using porous material immobilized bacterial agent and near-neutral binder

A technology for coating materials and slime, which is applied in the field of bacterial slime-based concrete protective coating materials, and can solve few problems such as

Active Publication Date: 2021-02-12
KYONGGI UNIV IND & ACAD COOPERATION FOUND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the existing research, self-healing concrete and water-purifying concrete that can continuously maintain the target performance and lifespan have been mainly studied on eco-friendly concrete using bacteria, but there are few bacterial element technologies and interactions with slime-forming bacteria. Domestic and foreign patents and similar research related to coating materials

Method used

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  • Manufacturing method for bacterial slime-based coating material using porous material immobilized bacterial agent and near-neutral binder
  • Manufacturing method for bacterial slime-based coating material using porous material immobilized bacterial agent and near-neutral binder
  • Manufacturing method for bacterial slime-based coating material using porous material immobilized bacterial agent and near-neutral binder

Examples

Experimental program
Comparison scheme
Effect test

experiment Embodiment 1

[0137] Experimental Example 1 (bacteria used: Rhodobacter capsulata)

[0138] In order to evaluate the sulfuric acid resistance of the concrete coated with the slime bacteria coating material, the coating material mixing experiments were divided into a total of three groups, and a total of 18 mixing experiments were performed. The details of the mixes for each set of coating materials used to mix the concrete are shown in Table 7 below.

[0139] 【Table 7】

[0140]

[0141] Variables for each group included replacement rate, bacteria-to-adhesive mixing ratio, and coating material thickness. In the first group, the replacement rate of the binder was used as the main variable, and the weight replacement rate of 100 times the mixing ratio of the bacteria to the adsorbent was set in the range of about 1 to about 2. In the second group, the replacement rate of the adhesive determined by the experimental results in the first group was fixed. Also, the main variable is the mix...

experiment Embodiment 2

[0233] Experimental Example 2 (Bacteria used: Rhodopseudomonas palustris and Bacillus thuringiensis)

[0234] The experiment was carried out by the same method as in Experimental Example 1, except that about 2.67 g / cm 3 α-hemihydrate gypsum with a specific gravity of 2.91g / cm 3 Blast furnace slag (GGBS) of specific gravity was mixed in a weight ratio of about 1:1, and used as a binder for preparing a bacterial mixed coating material by using Rhodopseudomonas palustris and Bacillus thuringiensis, and impregnating the adsorbent therein. The culture medium solution was mixed in a weight ratio of approximately 2.2:1 (adsorbent to binder ratio of 2.2) (expanded vermiculite used in the adsorbent was included at a ratio of 10:1 bacterial culture solution:expanded vermiculite) , and the experimental results are as follows.

[0235] (1) Appearance changes

[0236] Figure 61 The appearance of the test specimens for each immersion time due to sulfuric acid immersion is shown. In ...

experiment Embodiment 3

[0243] Experimental Example 3 (bacteria used: Capsulated Rhodobacter, Rhodopseudomonas palustris, Bacillus thuringiensis and subtilis Bacillus)

[0244] The experiment was carried out by the same method as in Experimental Example 1, except that the binder (wherein ordinary Portland cement (OPC) had about 3.15 g / cm 3 The specific gravity and blast furnace slag (GGBS) has about 2.91g / cm 3 The specific gravity) is used as a binder for the preparation of a coating material mixed with bacteria by using Rhodopseudomonas palustris, Rhodopseudomonas palustris, Bacillus thuringiensis and Bacillus subtilis, and a medium for impregnating the adsorbent The solutions were mixed in a weight ratio of approximately 2.2:1 (adsorbent to binder ratio of 2.2) (expanded vermiculite used in the adsorbent was included in a 10:1 ratio of bacterial culture solution:expanded vermiculite), and the experimental The result is as follows.

[0245] (1) Quality change

[0246] Figure 65 The mass cha...

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Abstract

The invention provides a method for manufacturing a bacterial mucus-based coating material by using a porous material to immobilize a bacterial agent and a near-neutral binder. This article can provide optimal slime-forming bacteria and optimal slime-forming conditions considering the chemical resistance of concrete, and can provide optimal adsorption method for bacterial autotrophic living environment when mixing existing concrete, while Not simply putting bacteria in. Also, considering the growth environment of bacteria, it is possible to provide an application technology with an optimal adhesive at a level of pH 8 to pH 10, and to provide an economical and easy And fully adsorb a large number of bacteria. Furthermore, a new conceptual coating material technology for improving the chemical resistance and durability of concrete can be provided in consideration of the mechanism regarding chemical corrosion of concrete sewer pipes and the mechanism of sulfate resistance of slime-forming bacteria.

Description

technical field [0001] The present invention relates to a concrete protection material technology, and more specifically, to a bacterial mucus-based concrete protection coating material. Background technique [0002] The present invention arose from research supported through a research grant from the Ministry of Construction and Transportation's Construction Technology Research Program. [0003] [Project Unique Number: 16SCIP-B103706-02, Research Project Name: Self-healing Green Concrete Technology Development] [0004] Concrete exposed to corrosive environments such as wastewater and manure and livestock wastewater has structural usability and safety issues due to various degradation phenomena and chemical corrosion, then has a life span of about 20 years to less than 30 years (Kim, Jong-pil, 2005 ). Therefore, in developed countries, relevant standards and specifications for concrete durability design have been formulated, and systematic systems have been established an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B28/08C04B28/00C04B28/02C04B28/14C04B28/34C04B111/20
CPCC04B28/001C04B28/021C04B28/04C04B28/08C04B28/146C04B28/34C04B2111/00482C04B2111/2015C04B7/147C04B2103/0001C04B14/204C04B7/02
Inventor 梁根赫尹贤燮李光明李相燮
Owner KYONGGI UNIV IND & ACAD COOPERATION FOUND