Evaporation process and tensile behavior of fiber-reinforced rammed earth

RONG De-zheng; TANG Chao-sheng; ZENG Hao; CHENG Qing; LI Hao-da; SHI Bin

doi:10.11779/CJGE202104009

Volume 43 Issue 4

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Chinese Journal of Geotechnical Engineering > 2021 > 43(4): 670-678. > DOI: 10.11779/CJGE202104009

RONG De-zheng, TANG Chao-sheng, ZENG Hao, CHENG Qing, LI Hao-da, SHI Bin. Evaporation process and tensile behavior of fiber-reinforced rammed earth[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(4): 670-678. DOI: 10.11779/CJGE202104009

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Evaporation process and tensile behavior of fiber-reinforced rammed earth

School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China

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Received Date: June 16, 2020
Available Online: December 04, 2022

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Abstract

The rammed earth is an environmental-friendly building material. Its mechanical properties draw lots of attention among researchers and engineers in recent years. In order to improve the tensile performance of the rammed earth, the fiber-reinforcement is applied to better modify its properties. A series of compacted rammed earth samples with different fiber contents (0~0.2%), initial water contents (16.5%~20.5%) and dry densities (1.5~1.7 g/cm³) are prepared by simulating the natural air-drying process of rammed earthmaking. The splitting tensile tests are carried out on the air-dried rammed earth samples. The effects of fiber content and initial state on the evaporation process and tensile strength of rammed earth are analyzed. The results show that: (1) The fiber content has few influences on the evaporation rate of the reinforced rammed earth. But with the increase of the fiber content, the residual moisture content of the reinforced rammed earth decreases first and then increases. (2) The fiber inclusion can significantly improve the tensile strength of the rammed earth, but the contribution of fiber reinforcement to strength increment will be reduced beyond a certain fiber content. The optimum fiber content for Xiashu soil in Nanjing area is observed at 0.1%. The fiber inclusion can also modify the brittle failure mode of the rammed earth to ductile one so as to improve the residual tensile strength and toughness of the rammed earth. (3) Increase of the initial water content and the initial dry density can significantly improve the tensile strength and the fiber reinforcement benefit. (4) The micromechanical interaction of the fiber-soil interface and the "bridging" effect of the fiber are the key factors controlling the overall tensile behavior of the fiber-reinforced rammed earth.
- rammed earth,
- fiber-reinforced soil,
- drying evaporation,
- tensile strength,
- water content,
- dry density

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[1]	PACHECO-TORGAL F, JALALI S. Earth construction: Lessons from the past for future eco-efficient construction[J]. Construction and Building Materials, 2012, 29: 512-519. doi: 10.1016/j.conbuildmat.2011.10.054
[2]	HALL M, DJERBIB Y. Rammed earth sample production: context, recommendations and consistency[J]. Construction and Building Materials, 2004, 18(4): 281-286. doi: 10.1016/j.conbuildmat.2003.11.001
[3]	刘军, 袁大鹏, 周红红, 等. 狗尾草对加筋土坯力学性能的影响[J]. 沈阳建筑大学学报(自然科学版), 2010, 26(4): 720-723, 733. https://www.cnki.com.cn/Article/CJFDTOTAL-SYJZ201004022.htm LIU Jun, YUAN Da-peng, ZHOU Hong-hong, et al. Impact of green bristle grass on mechanical properties of reinforced rammed earth[J]. Journal of Shenyang Jianzhu University (Natural Science), 2010, 26(4): 720-723, 733. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-SYJZ201004022.htm
[4]	EASTON D. The Rammed Earth House[M]. Vermont: Chelsea Green Publishing Company, 2007: 1-42.
[5]	KOUAKOUC H, MORELJ C. Strength and elasto-plastic properties of non-industrial building materials manufactured with clay as a natural binder[J]. Applied Clay Science, 2009, 44(1/2): 27-34.
[6]	SILVEIRA D, VARUM H, ANÍBAL Costa, et al. Mechanical properties of rammed earth bricks in ancient constructions[J]. Construction and Building Materials, 2012, 28(1): 36-44. doi: 10.1016/j.conbuildmat.2011.08.046
[7]	JAQUIN P A, AUGARDE C E, GALLIPOLI D, et al. The strength of unstabilised rammed earth materials[J]. Géotechnique, 2009, 59(5): 487-490. doi: 10.1680/geot.2007.00129
[8]	BUI Q B, MOREL J C, HANS S, et al. Effect of moisture content on the mechanical characteristics of rammed earth[J]. Construction and Building materials, 2014, 54: 163-169. doi: 10.1016/j.conbuildmat.2013.12.067
[9]	BECKETT C, CIANCIO D. Effect of compaction water content on the strength of cement-stabilized rammed earth materials[J]. Canadian Geotechnical Journal, 2014, 51(5): 583-590. doi: 10.1139/cgj-2013-0339
[10]	EL-NABOUCH R, BUI Q B, PLÉ O, et al. Characterizing the shear parameters of rammed earth material by using a full-scale direct shear box[J]. Construction and Building Materials, 2018, 171: 414-420. doi: 10.1016/j.conbuildmat.2018.03.142
[11]	ARAKI H, KOSEKI J, SATO T. Tensile strength of compacted rammed earth materials[J]. Soils and Foundations, 2016, 56(2): 189-204. doi: 10.1016/j.sandf.2016.02.003
[12]	谢约翰, 唐朝生, 尹黎阳, 等. 纤维加筋微生物固化砂土的力学特性[J]. 岩土工程学报, 2019, 41(4): 675-682. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201904014.htm XIE Yue-han, TANG Chao-sheng, YIN Li-yang, et al. Mechanical behavior of microbial-induced calcite precipitation (MICP) - treated soil with fiber reinforcement[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(4): 675-682. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201904014.htm
[13]	TANG C S, WANG D Y, CUI Y J, et al. Tensile strength of fiber-reinforced soil[J]. Journal of Materials in Civil Engineering, 2016, 28(7): 04016031. doi: 10.1061/(ASCE)MT.1943-5533.0001546
[14]	唐朝生, 施斌, 高玮, 等. 纤维加筋土中单根纤维的拉拔试验及临界加筋长度的确定[J]. 岩土力学, 2009, 30(8): 2225-2230. doi: 10.3969/j.issn.1000-7598.2009.08.004 TANG Chao-sheng, SHI Bin, GAO Wei, et al. Single fiber pull-out test and the determination of critical fiber reinforcement length for fiber reinforced soil[J]. Rock and Soil Mechanics, 2009, 30(8): 2225-2230. (in Chinese) doi: 10.3969/j.issn.1000-7598.2009.08.004
[15]	PATEL S K, SINGH B. Strength and deformation behavior of fiber-reinforced cohesive soil under varying moisture and compaction states[J]. Geotechnical and Geological Engineering, 2017, 35(4): 1767-1781. doi: 10.1007/s10706-017-0207-y
[16]	CONSOLI N C, BASSANI M A A, FESTUGATO L. Effect of fiber-reinforcement on the strength of cemented soils[J]. Geotextiles and Geomembranes, 2010, 28(4): 344-351. doi: 10.1016/j.geotexmem.2010.01.005
[17]	王德银, 唐朝生, 李建, 等. 纤维加筋非饱和黏性土的剪切强度特性[J]. 岩土工程学报, 2013, 35(10): 1933-1940. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201310029.htm WANG De-yin, TANG Chao-sheng, LI Jian, et al. Shear strength characteristics of fiber-reinforced unsaturated cohesive soils[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(10): 1933-1940. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201310029.htm
[18]	TANG C S, SHI B, GAO W, et al. Strength and mechanical behavior of short polypropylene fiber reinforced and cement stabilized clayey soil[J]. Geotextiles and Geomembranes, 2007, 25(3): 194-202. doi: 10.1016/j.geotexmem.2006.11.002
[19]	TANG C S, SHI B, ZHAO L Z. Interfacial shear strength of fiber reinforced soil[J]. Geotextiles and Geomembranes, 2010, 28(1): 54-62. doi: 10.1016/j.geotexmem.2009.10.001
[20]	AN N, TANG C S, XU S K, et al. Effects of soil characteristics on moisture evaporation[J]. Engineering Geology, 2018, 239: 126-135. doi: 10.1016/j.enggeo.2018.03.028
[21]	FRYDMAN S. Applicability of the Brazilian (indirect tension) test to soils[J]. Australian Journal of Applied Science, 1964, 15(4): 335-343.
[22]	王德银, 唐朝生, 李建, 等. 纤维加筋非饱和黏性土的剪切强度特性[J]. 岩土工程学报, 2013, 35(10): 1933-1940. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201310029.htm WANG De-yin, TANG Chao-sheng, LI Jian, et al. Shear strength characteristics of fiber-reinforced unsaturated cohesive soils[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 35(10): 1933-1940. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201310029.htm
[23]	HILLEL D. Introduction to Environmental Soil Physics[M]. Massachusetts: Academic Press, 2003: 337-361.
[24]	MILLERC J, RIFAI S. Fiber Reinforcement for waste containment soil liners[J]. Journal of Environmental Engineering, 2004, 130(8): 891-895. doi: 10.1061/(ASCE)0733-9372(2004)130:8(891)
[25]	DELAGE P, AUDIGUIER M, CUI Y J, et al. Microstructure of a compacted silt[J]. Canadian Geotechnical Journal, 1996, 33(1): 150-158. doi: 10.1139/t96-030
[26]	CHADUVULA U, VISWANADHAM B V S, KODIKARA J. A study on desiccation cracking behavior of polyester fiber-reinforced expansive clay[J]. Applied Clay Science, 2017, 142: 163-172.
[27]	MILLOGO Y, MOREL J C, AUBERT J E, et al. Experimental analysis of pressed rammed earth blocks reinforced with Hibiscus cannabinus fibers[J]. Construction and Building Materials, 2014, 52: 71-78.
[28]	TANG C S, SHI B, GAO W, et al. Strength and mechanical behavior of short polypropylene fiber reinforced and cement stabilized clayey soil[J]. Geotextiles and Geomembranes, 2007, 25(2): 194-202.