Development of Rapid Hardening Backfill Material for Reducing  Ground Subsidence

Yong-Sun Ryu; Jin-Gyu Han; Woo-Ri Chae; Ja-Sul Koo; Dae-Young Lee

doi:10.12814/jkgss.2015.14.3.013

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2015 Vol.14, Issue 3 Preview Page Next Page

Development of Rapid Hardening Backfill Material for Reducing Ground Subsidence 지반함몰 저감을 위한 속경형 하수관거 뒤채움재료 개발

30 September 2015. pp. 13-20

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Abstract

Inappropriate backfill material and poor compaction cause the damage to sewer and ground settlement. To deal with such problem, flowable backfill material has attracted attention recently. A basic study was conducted in a bid to obtain optimum mixing ratio of backfill material with the characteristics of rapid hardening, pseudo-plasticity, flowability and anti washout ability and enhance the cost efficiency of backfill material. Through the test of optimal mixing ratio of rapid hardening, evaluation of optimal mixing ratio of backfill material was conducted. As a result, required performance as well as cost efficiency could be achieved by adjusting plasticizer even in case of increasing W/M of the paste of rapid hardening to 100%.

Keywords

Backfill material

Settlement

Pseudo-plasticity

flowability

하수관거 시공시 부적절한 뒤채움재 및 다짐불량으로 인해 하수관로 파손 및 지반침하 현상이 발생한다. 최근들어 이러한 문제점을 해결하기 위해 유동성 채움재에 대한 관심이 증가하고 있다. 본 연구에서는 속경성, 가소성, 유동성, 수중불분리성을 갖춘 뒤채움재의 최적배합 도출과 뒤채움재의 경제성 향상을 위한 기초 연구를 수행하였다. 속경성 결합재의 최적배합 도출 실험 결과를 통해 뒤채움재의 최적 배합의 특성을 평가하였다. 시험결과, 속경성 결합재 페이스트의 W/M을 100%까지 증가시켜도 가소제 첨가량을 적절히 조절하여 사용하면 요구 성능을 만족시킴과 동시에 경제성 또한 확보 할 수 있을 것으로 사료된다.

References

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3.Kim, Y.J. (2011), Engineering Characteristics of Lightweight Foamed Controlled Low-strength Materials with Coal Ash for Backfill, Ph.D. thesis, Hanyang Univ., pp.1-97.

4.Kong, J.Y., Kang, H.N. and Chun, B.S. (2010), “Characteristics of Uncofined Compressive Strength and Flow in Controlled Low Strength Materials Made with Coal Ash”, Journal of KGS, Vol.26, No.1, pp.75-83.

5.Lee, Y.J., Yea, G.G., Park, S.W. and Kim, H. Y. (2015), “Behavior Characteristics of Underground Flexible Pipe Backfilled with Lightweight Foamed Soil”, J. Korean Geosynthetics Society, Vol.14. No.1, pp.43-50.

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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 : 14
No :3
Pages :13-20
Received Date : 2015-07-22
Revised Date : 2015-08-13
Accepted Date : 2015-08-18
DOI :https://doi.org/10.12814/jkgss.2015.14.3.013

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

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