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2023 Vol.39, Issue 7 Preview Page
Effect of Immersion and High Temperature on Shear Strength of Cemented Sand

수침 및 고온이 고결모래의 전단강도에 미치는 영향

Hong Duk Moon1
,
Keum-Bee Hwang2
,
Tae-hun Kim3
,
Sung-Sik Park4*
문 홍득1
,
황 금비2
,
김 태헌3
,
박 성식4*
1Member, Prof., Dept. of Civil & Infra. Eng., Gyeongsang National Univ.
2Research Associate, Dept. of Civil Eng., Kyungpook National Univ.
3Graduate Student, Dept. of Civil Eng., Kyungpook National Univ.
4Member, Prof., Dept. of Civil Eng., Kyungpook National Univ.
1정회원, 경상국립대학교 건설환경공과대학 건설시스템공학과 교수
2비회원, 경북대학교 공과대학 건설환경에너지공학부 연구원
3비회원, 경북대학교 공과대학 건설환경에너지공학부 박사과정
4정회원, 경북대학교 공과대학 토목공학과 교수
*Corresponding Author
31 July 2023. pp. 17-30
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Abstract

This study investigates the impact of water immersion and high temperature on the shear strength of cemented sand through direct shear tests. Standard Jumunjin sand was used and cemented with binders, such as ultra-rapid hardening cement and an epoxy aqueous solution. The binder was mixed at concentrations of 4%, 8%, or 12%. Subsequently, cylindrical cemented specimens with a diameter of 64 mm and height of 25 mm were produced using compaction. The curing period was three days, and the specimens were cured under dry air, immersion, and heating conditions. The heating condition involved subjecting the immersed specimens to a microwave oven three times for three minutes to achieve an internal temperature of approximately 90°C. Regardless of the binder type, the cohesion of the cemented sand increased with higher binder content, whereas the internal friction angle exhibited a slight increase or decrease. Compared with ultra-rapid hardening cemented sand, epoxy-cemented sand displayed an average cohesion that was five times higher and an internal friction angle that was 10° higher. Overall, irrespective of binder type, the shear strength decreased during water immersion and increased during heating. Notably, the epoxy-cemented sand exhibited a three-fold increase in cohesion and a more than 20° increase in the internal friction angle during heating.

Keywords
Cemented sand
Cohesion
Curing method
Friction angle
Shear strength

본 논문에서는 직접전단시험을 이용하여 수침이나 고온이 고결모래의 전단강도에 미치는 영향에 대해 연구하였다. 고결제로 초속경 시멘트와 에폭시 수용액을 사용하여 표준사인 주문진표준사를 고결시켰다. 고결제는 4, 8, 또는 12%로 혼합한 다음 다짐방식으로 직경 64mm, 높이 25mm의 원주형 고결 공시체를 제작하였다. 양생일은 모두 3일로 동일하며, 양생조건은 대기중 양생, 수침 및 가열 조건이다. 여기서 가열 조건은 수침한 공시체를 전자레인지로 3분씩 3회 반복하여 공시체 내부에 90°C 정도의 고온을 발생시켰다. 고결제의 종류에 관계없이 고결제 함유량이 증가할수록 고결모래의 점착력은 증가하였으나, 내부마찰각은 약간 증가하거나 오히려 감소하였다. 초속경 시멘트 고결모래에 비해 에폭시 고결모래가 평균적으로 점착력은 5배, 마찰각은 10° 정도 높게 나타나 더 높은 강도를 보였다. 전반적으로 고결제의 종류에 관계없이 수침 시 전단강도는 감소하고 가열 시 전단강도는 증가하였다. 특히, 에폭시 고결모래의 경우 가열 시 점착력은 평균 3배, 내부마찰각은 20° 이상 증가하였다.

References
1
Anagnostopoulos, C. A. and Papaliangas, T.T. (2012), "Experimental Investigation of Epoxy Resin and Sand Mixes", J. Geotech Geoenviron. Eng., Vol.138, No.7, pp.841-849. 10.1061/(ASCE)GT.1943-5606.0000648
2
Czaderski, C., Martinelli, E., Michels, J., and Motavalli, M. (2012), "Effect of Curing Conditions on Strength Development in an Epoxy Resin for Structural Strengthening", Composites Part B: Engineering, Vol.43, No.2, pp.398-410. 10.1016/j.compositesb.2011.07.006
3
Das, B.M. (2012), Principles of Geotechnical Engineering, Eighth Edition, p.436.
4
Hwang, K.B. (2023), Effect of curing methods on shear strength of cemented sands, Master thesis, Kyungpook National University.
5
Jin, N.J., Yeon, J., Seung, I., and Yeon, K.S. (2017), "Effects of Curing Temperature and Hardener Type on the Mechanical Properties of Bisphenol F-type Epoxy Resin Concrete", Construction and Building Materials, Vol.156, pp.933-943. 10.1016/j.conbuildmat.2017.09.053
6
Kim, J. S. (2020), A study on the performance evaluation of red clay binder added with a polymer aqueous solution and epoxy emulsion, Master thesis, Kyungpook National University.
7
Kim, K. Y., Park, H. G., and Jeon, J. S. (2005), "Strength Characteristics of Cemented Sand and Gravel", Journal of the Korean geotechnical society, Vol.21, No.10, pp.61-71. 10.7843/kgs.2015.31.10.61
8
Kwon, S. Y., Lee, M. Y., and Yang, S. H. (2017), "A Molecular Dynamics Simulation Study on Hygroelastic behavior of Thermosetting Epoxy", The Korean Society for Composite Materials, Vol.30, No.6, pp.371-378.
9
Lee, K. C., Her, J.H., Lee, S.Y., and Wee, H.A. (2006), "Preparation of Loess Composites Containing Polymer Resins", Applied Chemistry, Vol.10, No.2, pp.417-420.
10
Park, S. S. and Choi, S. G. (2011), "Effect of Fine on Unconfined Compressive Strength of Cemented Sands", Journal of the Korean Society of Civil Engineers, Vol.31, No.6C, pp.213-220.
11
Park, S. S., Kang, H. W., and Han, K. S. (2007), "Development of Fly Ash/slag Cement Using Alkali-activated Reaction(1) - Compressive Strength and Acid Corrosion Resistance", Journal of Korea Society of Environmental Engineers, Vol.29, No.7, pp.801-809.
12
Park, S. S., Kim, K. Y., Choi, H. S., and Kim, C. W. (2009a), "Effect of Different Curing Methods on the Unconfined Compressive Strength of Cemented Sand", Journal of the Korean Society of Civil Engineers, Vol.29, No.5C, pp.207-215.
13
Park, S. S., Kim, K. Y., Choi, H. S., and Kim, C. W. (2009b), "Strength Variation of Cemented Sand Due to Wetting", Journal of the Korean Society of Civil Engineers, Vol.29, No.6C, pp.303-311.
14
Park, S. G., Kwon, S. J., Km, Y. M., and Lee, S, S. (2013), "Reaction Properties of Non-Cement Mortar Using Ground Granulated Blast Furnace Slag", The Journal of the Korea Contents Association, Vol.13, No.9, pp.392-399. 10.5392/JKCA.2013.13.09.392
15
Park, S. S. and Lee, J. W. (2012), "Effect of Sea Water on Curing and Strength of Cemented Sands", Journal of the Korean geotechnical society, Vol.28, No.6, pp.71-79. 10.7843/kgs.2012.28.6.71
16
Park, S. S., Suh, E. H., Chae, K. H., Jang, S. K., and Kim, J. H. (2015), "A Study on Soil Cementation and Calcite Precipitation with Clay as a Medium", Journal of the Korean geotechnical society, Vol.31, No.12, pp.17-27. 10.7843/kgs.2015.31.12.17
17
Park, S. S. and Woo, S. W. (2019), "Evaluation of Strength and Durability of Casein-cemented Sand", Journal of the Korean geotechnical society, Vol.35, No.1, pp.31-42.
18
Rahmannejad, M. and Toufigh, V. (2018), "Influence of Curing Time and Water Content on Unconfined Compressive Strength of Sand Stabilized Using Epoxy Resin", International Journal of Engineering, Vol.31, No.8, pp.1187-1195. 10.5829/ije.2018.31.08b.05
Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 39
  • No :7
  • Pages :17-30
  • Received Date : 2023-05-26
  • Revised Date : 2023-06-24
  • Accepted Date : 2023-06-25
  • DOI :https://doi.org/10.7843/kgs.2023.39.7.17
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