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Çѱ¹Áö¹Ý°øÇÐȸ / v.27, no.5, 2011³â, pp.75-84
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( Effect of Biomineralization on the Strength of Cemented Sands )
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Èë ¼Ó¿¡ Á¸ÀçÇÏ´Â ¹Ì»ý¹° Áß¿¡´Â ź»êÄ®½·°ú °°Àº ±¤¹°ÁúÀ» »ý¼º½ÃŰ´Â ¹Ì»ý¹°ÀÌ ÀÖÀ¸¸ç, ÀÌ·¸°Ô »ý¼ºµÈ ź»êÄ®½·Àº Áö¹Ý ³»ÀÇ °ø±Ø¿¡ ħÀüµÇ¾î ¼ö¹Ð¼ºÀ» ³ôÀ̰ųª Áö¹ÝÀ» °í°á½Ãų ¼ö ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â ÀÌ¿Í °°Àº ¹Ì»ý¹°ÀÌ Áö¹Ý ³»¿¡¼­ ±¤¹°ÁúÀ» ¾î´À Á¤µµ »ý¼ºÇÏ´ÂÁö¿Í »ý¼ºµÈ ±¤¹°ÁúÀÌ Áö¹ÝÀÇ °­µµ¿¡ ¾î¶² ¿µÇâÀ» ¹ÌÄ¡´ÂÁö ºÐ¼®ÇÏ¿´´Ù. ÇöÀåÁö¹ÝÀÇ ¾àÇÑ °í°á»óŸ¦ ¸ð»çÇϱâ À§ÇÏ¿© ¸ð·¡¿¡ 3%ÀÇ ½Ã¸àÆ®¸¦ ¼¯¾î 3ÀÏ µ¿¾È ¾ç»ý½ÃŲ ¿øÇü°ø½Ãü¸¦ Á¦ÀÛÇÏ¿´´Ù. ¾àÇÏ°Ô °í°áµÈ °ø½Ãü¿¡ Sporosarcina pasteurii ±Õ ¿ë¾×À» 20ÀÏ µ¿¾È ÃÖ´ë 10ȸ ¹Ýº¹ ÁÖÀÔÇÑ ´ÙÀ½ °ø½ÃüÀÇ ÀÏÃà¾ÐÃà°­µµ¿Í °ø±ØÀ» ä¿î ±¤¹°ÁúÀ» ºÐ¼®ÇÏ¿´´Ù. ¹Ì»ý¹°À» 1ȸ ÁÖÀÔÇÑ °æ¿ì °ø½ÃüÀÇ ÀÏÃà¾ÐÃà°­µµ´Â ¹Ì»ý¹°ÀÌ µé¾î°¡Áö ¾ÊÀº °æ¿ìº¸´Ù 5% Á¤µµ Áõ°¡ÇÏ¿´À¸³ª, 2ȸ ÀÌ»ó ÁÖÀÔÇÒ °æ¿ì °­µµ´Â ¿ÀÈ÷·Á °¨¼ÒÇÏ¿´À¸¸ç ÁÖÀÔ È½¼ö°¡ Áõ°¡ÇÒ¼ö·Ï ÀÏÃà¾ÐÃà°­µµ´Â °è¼Ó °¨¼ÒÇÏ¿© ÃÖ´ë 50%±îÁö °¨¼ÒÇÏ¿´´Ù. ¹Ì»ý¹°À» ¹Ýº¹ ÁÖÀÔÇÒ °æ¿ì ÁÖÀÔ È½¼ö¿¡ µû¶ó °í°á¸ð·¡ ³»¿¡ ź»êÄ®½·ÀÌ Áö¼ÓÀûÀ¸·Î »ý¼ºµÇ¸é¼­ °ø±ØÀ» ä¿ì´Â Á¤µµ°¡ Áõ°¡ÇÏ¿´´Ù. ÇÏÁö¸¸, ¾àÇÏ°Ô °í°áµÈ Áö¹Ý ³»¿¡ ź»êÄ®½·ÀÌ ÀÏÁ¤ ÀÌ»ó ħÀüµÉ °æ¿ì °­µµ´Â ¿ÀÈ÷·Á °¨¼ÒÇÏ¿´´Ù.
There are some kinds of microorganisms within soils which can precipitate some minerals such as calcite under suitable conditions. Such precipitated calcites within pores of soil may reduce permeability and also cement soil particles. In this study, whether such microorganisms can fill pores within soil and increase the strength is investigated. Basillus pasteurii was repeatedly injected into weakly cemented sand with 3% cement ratio up to 10 times for 20 days. Then, cemented sand injected with microorganisms was tested for an unconfined compressive strength and evaluated for filling voids between soil particles. The unconfined compressive strength of one time injected specimen showed a 5% increase compared to untreated specimen. However, for more than two times the strength of injected specimens gradually decreased up to 50% of the untreated specimen by microorganisms. As the number of microorganism injection increased, the amount of calcite precipitation slightly increased within voids. However, over-precipitated calcites may result in strength decrease of slightly cemented soils.
 
Ű¿öµå
Cemented sand;Microorganism;Calcite;Strength;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.27, no.5, 2011³â, pp.75-84
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201121559391884)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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