Analysis of the Strength Characteristics of Hair Fiber Reinforced Caly Soil

Moorak Son; Hwasun Song; Jaeyong Lee

doi:10.7843/kgs.2015.31.6.15

All Issue

2015 Vol.31, Issue 6 Preview Page Next Page

Analysis of the Strength Characteristics of Hair Fiber Reinforced Caly Soil 헤어섬유로 보강된 점토흙의 강도특성 분석

30 June 2015. pp. 15-25

PDF XML

Abstract

This study aimed at the strength increase of the soft ground and analyzed the strength characteristics of clay soil reinforced with hair fiber which is environmentally friendly. The study varied the length of hair fiber, the amount of hair fiber, the amount of cement, and curing days to investigate both the compressive and tensile strengths and the stress-strain relationship of hair fiber mixed clay soils. The test results indicated that both the compressvie and tensile strengths increased with hair fiber mixed, especially in the tensile strength. In addition, the hair fiber mixed clay soil allowed larger displacement to failure. Based on the test results, it is thought that the environmentally friendly hair fiber could be utilized practically to increase the clay strength in the future.

Keywords

Hair fiber

Clay soil

Cement

Strength

Stress-Strain

본 연구는 연약지반의 강도증진을 목적으로 친환경 헤어섬유를 혼입한 점토흙의 강도특성을 파악하였다. 본 연구에서는 헤어섬유의 길이 및 혼입율, 시멘트의 첨가량, 양생기간을 변화시키며 헤어섬유 혼입 점토흙의 압축강도 및 인장강도를 조사하였으며, 또한 응력-변형율 특성을 조사하였다. 시험결과, 헤어섬유 혼입점토는 압축 및 인장 모두에서 강도증진을 보였으며, 특히 인장강도에서 보다 큰 효과가 있는 것으로 나타났다. 뿐만 아니라, 헤어섬유 혼입점토가 파괴시까지 더 큰 변위를 허용하는 것으로 나타났다. 이와같은 결과를 토대로 향후 점토지반 강도증진을 위해 친환경재료인 헤어섬유를 실무적으로 활용해도 될 것으로 판단된다.

References

1.Cai, Y., Shi, B., Ng, W.W., and Tang, C. (2006), “Effect of Polypropylene Fibre and Lime Admixture on Engineering Properties of Clayey Soil”, Engineeri Geology, Vol.87, pp.230-240.

2.Cho, Sam-Deok and Kim, Jin-Man (1995), “The Experimental Study on Engineering Properties of Fiber Reinforced Soil”, Geotechnical Engineering, Vol.11, No.2, pp.107-120

3.Freitag, D.R. (1986), “Soil Randomly Reinforced with Fibers”, Journal of Geotechnical Engineering, Vol.112, No.8, pp.823-826.

4.Kim, Yun-Tae, Kim, Hong-Joo, and Lee, Jong-Sub (2007), “Experi-mental Study on Mechanical Properties of Fiber-Reinforced Light-weight Soil”, Korean Society of Civil Engineers, Vol.27, No.3, pp. 195-202.

5.Kim, Woo-Sik, Jung, Du-Hwoe, and Cho ll-Muk (2002), “Compressive Strength Characteristics of PVA Fiber Reinforced Soil-Cement Mixture”, Korean Society of Hazard Mitigation, Vol.12, No.3, pp.147-156.

6.Korean Standards Association (2012), KS F 2328. Testing method for compressive strength of molded soil-cement cylinders.

7.Korean Standards Association (2012), KS F 2329. Testing method for making curing of soil－cement compression and flexure test specimens in the laboratory.

8.Maher, M. and Ho, Y. (1994), “Mechanical Properties of Kaolinite/ Fiber Soil Composite”, Journal of Geotechnical Engineering, ASCE, Vol.120, No.8, pp.1381-1393.

9.Park, Sung-Sik, Kim, Young-Su, and Lee, Jong-Cheon (2007), “Unconfined Compressive Strength of Fiber-reinforced Cemented Sands by Fiber Reinforcement Form”, Korean Geotechnical Society, Vol.23, No.8, pp.159-169.

10.Song, Chang-Seob and Im, Seong-Yun (2002), “Mechanical Cha-racteristics of Reinforced Soil (2)-Fiber Reinforced Soil”, Korean Geo-Eenvironmental Society, Vol.5, No.6, pp.37-42.

11.Tang, C., Shi, B., Gao, W, Chen, F., and Cai, Y. (2007), “Strength and Mechanical Behavior of Short Polypropylene Fiber Reinforced and Cement Stabilized Clayey Soil”, Geotextiles and Geomembranes, Vol.25, No.3, pp.194-202.

Information

Publisher :The Korean Geotechnical Society
Publisher(Ko) :한국지반공학회
Journal Title :Journal of the Korean Geotechnical Society
Journal Title(Ko) :한국지반공학회 논문집
Volume : 31
No :6
Pages :15-25
Received Date : 2015-03-21
Revised Date : 2014-06-10
Accepted Date : 2015-06-21
DOI :https://doi.org/10.7843/kgs.2015.31.6.15

Journal of the Korean Geotechnical Society ISSN:1229-2427(Print) 2288-646X(Online) 한국지반공학회 논문집

All Issue