A STUDY OF REDUCING FOR CEMENT TREATED SOIL'S DETERIORATION BY MICROBIAL FUNCTION

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  • 微生物機能を活用したセメント改良土の劣化抑制技術に関する検討

Abstract

 Cement treated soil is used as a countermeasure for poor ground. But, cement treated soil deteriorate by calcium leaching because of exposing seawater. This study considered a technology of reducing deterioration of cement treated soil by using microbial function. This microbial function is urease. The urease is a function to hydrolyze urea. Authors tested seawater exposure tests using 2 types of the urease-producing bacteriums of Sporosarcina aquimarina and Bacillius pasteurii. The purpose of this tests are checking effect of reducing deterioration of cement treated soil by the urease-producing bacteriums.<br> In addition, We tested seawater exposure tests 2 types of conditions of temperature 20°C is used for exposure tests, and 30°C is a temperature that is suitable for the growth of bacteriums, the purpose of this tests are checking relation temperature and deterioration speed. The main outcomes are as follows: 1) 2 types of the urease-producing bacteriums have an effect of reducing deterioration 2) 2 types of condition of temperature have relation to deterioration speed.

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