The Study of Optimum Lime Content for Ground Improvement of Clayey Soils and Its Effects on Plasticity and Strength Characteristics

Jeong-Min Goo; Changho Choi

doi:10.12814/jkgss.2013.12.1.021

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2013 Vol.12, Issue 1 Preview Page Next Page

The Study of Optimum Lime Content for Ground Improvement of Clayey Soils and Its Effects on Plasticity and Strength Characteristics 점성토 지반 개량을 위한 최적 생석회 첨가량 결정 및 이에 따른 소성 및 강도 특성 분석

30 March 2013. pp. 21-28

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Abstract

This study proposed optimum lime contents for clayey soils consisting of representative clay minerals, Kaolinite and Na-Bentonite, according to optimum lime content method (ASTM C 977-22) by means of ground improvement method of clayey soils. As geotechnical properties, the variations of atterberg limits and unconfined compressive strength were analyzed and Ca-ion and micro-structure along elapsed time were observed for lime-added clayey specimens. The test results show that optimum lime content method provides an appropriate methodology for ground improvement of clayey soils and the variation of Ca2+ might be a good index to predict the rate of ground improvement for clayey soils with lime addition.

Keywords

Clayey soils

Optimum lime contents

Ca-ion concentration

본 연구에서는 점성토 지반의 지반공학적 특성의 개량을 목적으로 OO지역에서 채집한 점성토와 이에 대한 대표적 점토광물인 Kaolinite 및 Na-Bentonite에 대하여 최적 생석회 첨가량 결정법(ASTM C 977-22) 방법에 의거하여 각 시료에 대하여 생석회 첨가량을 결정하였다. 이에 대한 지반공학적 특성인 아터버그한계, 일축압축강도의 변화에 대하여 분석하였으며, 시간경과에 따른 Ca 이온 변화 및 점토입자의 미세결정구조 변화를 관찰, 분석하였다. 본 실험 결과 점성토 지반의 지반공학적 특성 개선을 위하여 첨가되는 생석회 첨가량은 최적 생석회 첨가량 결정법에 의해 효과적으로 결정할 수 있고, 시간에 따른 Ca2+ 이온 변화 측정치는 점성토 지반의 지반공학적 개선효과 추정에 활용 가능함을 확인하였다.

References

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Information

Publisher :Korean Geosythetics Society
Publisher(Ko) :한국지반신소재학회
Journal Title :Journal of the Korean Geosynthetics Society
Journal Title(Ko) :한국지반신소재학회 논문집
Volume : 12
No :1
Pages :21-28
Received Date : 2013-02-20
Revised Date : 2013-03-11
Accepted Date : 2013-03-13
DOI :https://doi.org/10.12814/jkgss.2013.12.1.021

Journal of the Korean Geosynthetics Society ISSN:2508-2876(Print) 2287-9528(Online) 한국지반신소재학회 논문집

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