화강풍화토와 미생물 혼합물의 고결 반응 메커니즘
A Study on Cementation Reaction Mechanism for Weathered Granite Soil and Microbial Mixtures
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초록
The purpose of this study is to investigate the reaction mechanism of soil and bacteria solution by various mixing ratios. For this purpose, in orderto understand the reaction mechanisms of microorganisms and weathered granite soil, the tests were carried out under various mixing ratios additivessuch as soil, bacteria solution, Ca(OH)2 and fixture. The test results from this study are summarized as follows. Firstly, the reaction between the bacteriasolution and fixture produced a precipitate called vaterite, a type of silicate and calcium carbonate. Secondly, as a result of SEM analysis, the resultingprecipitates generated from the test results using the specimens with various mixing ratios except SW condition and the irregular spherical microscopicshapes were formed in the size of 150 μm to 20 μm. In addition, it can be seen that the bacteria solution and the fixture reacted between the granulesto form an adsorbent material layer on the surface, and the microorganisms had a biological solidifying effect when the pores are combined into hardparticles. Finally, The XRD analysis of the sediment resulting from the reaction between the microorganism and the deposit control agent confirmedthe presence of a type of calcium carbonate (CaCO3) vaterite, which affects soil strength formation, as well as silicate(SiO2).
Abstract
The purpose of this study is to investigate the reaction mechanism of soil and bacteria solution by various mixing ratios. For this purpose, in orderto understand the reaction mechanisms of microorganisms and weathered granite soil, the tests were carried out under various mixing ratios additivessuch as soil, bacteria solution, Ca(OH)2 and fixture. The test results from this study are summarized as follows. Firstly, the reaction between the bacteriasolution and fixture produced a precipitate called vaterite, a type of silicate and calcium carbonate. Secondly, as a result of SEM analysis, the resultingprecipitates generated from the test results using the specimens with various mixing ratios except SW condition and the irregular spherical microscopicshapes were formed in the size of 150 μm to 20 μm. In addition, it can be seen that the bacteria solution and the fixture reacted between the granulesto form an adsorbent material layer on the surface, and the microorganisms had a biological solidifying effect when the pores are combined into hardparticles. Finally, The XRD analysis of the sediment resulting from the reaction between the microorganism and the deposit control agent confirmedthe presence of a type of calcium carbonate (CaCO3) vaterite, which affects soil strength formation, as well as silicate(SiO2).
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