Hydro-mechanical properties of sludge stabilized with magnesium oxychloride cement-based multi-cementitious materials under influences of drying-wetting cycles

WANG Xiequn; LIU Ning; LI Zhiqi; HAN Zhong; ZOU Weilie

doi:10.11779/CJGE20220846

Volume 45 Issue 10

Turn off MathJax

Article Contents

Abstract

References

Supplements

Chinese Journal of Geotechnical Engineering > 2023 > 45(10): 2004-2013. > DOI: 10.11779/CJGE20220846

WANG Xiequn, LIU Ning, LI Zhiqi, HAN Zhong, ZOU Weilie. Hydro-mechanical properties of sludge stabilized with magnesium oxychloride cement-based multi-cementitious materials under influences of drying-wetting cycles[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(10): 2004-2013. DOI: 10.11779/CJGE20220846

Citation:

PDF (3124 KB)

Hydro-mechanical properties of sludge stabilized with magnesium oxychloride cement-based multi-cementitious materials under influences of drying-wetting cycles

1.
School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, China
2.
School of Civil Engineering, Wuhan University, Wuhan 430072, China

More Information

Received Date: July 05, 2022
Available Online: March 05, 2023

Graphical Abstract

Abstract

Abstract

In order to investigate the long-term performance of "modified cured silt", which is a multi-phase cementitious material based on green magnesium chloride cement and supplemented by fly ash and slag as the industrial by-products, by further modifiying the initially cured silt as the roadbed filler, the soil-water characteristic curve (SWCC), rebound modulus (M_R), unconfined compressive strength (q_u), stiffness parameters (E_1% and S_u1%) and cumulative plastic strain (ε_p) of the modified cured silt in East Lake section of Wuhan are obtained through a series of tests after various drying-wetting cycles. The results show that: (1) The drying-wetting cycles produce a large number of macroscopic cracks and microscopic fissures in the modified cured silt specimens, which significantly reduce their water holding capacity in the low suction section, but have essentially no effects on the water holding capacity in the high suction section. (2) q_u, E_1%, S_u1% and M_Rrep all decay with the increasing N_DW, and their decay mechanisms are similar, and the decay factor (χ_DW)- N_DW relationship model is established accordingly. (3) After undergoing the drying-wetting cycles, the sensitivity of M_R to changes in the periapical pressure (σ_c) increases, whereas two different responses to the bias pressure (σ_d) are observed. (4) ε_p of the modified cured silt specimens that do not undergo the drying-wetting cycles exhibits a plastic stable type, while after undergoing the drying-wetting cycles, ε_p of the specimens transforms into a plastic transitional type at high σ_d and low σ_c levels

FullText(HTML)

References (25)

References

[1]	张俊峰, 戴小松, 邹维列, 等. 水泥改性固化脱水淤泥路用性能试验[J]. 浙江大学学报(工学版), 2015(11): 2165-2171. https://www.cnki.com.cn/Article/CJFDTOTAL-ZDZC201511018.htm ZHANG Junfeng, DAI Xiaosong, ZOU Weilie, et al. Experiments on pavement performance of solidified sediment modified with cement[J]. Journal of Zhejiang University (Engineering Science), 2015(11): 2165-2171. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZDZC201511018.htm
[2]	LIU J K, CHANG D, YU Q M. Influence of freeze-thaw cycles on mechanical properties of a silty sand[J]. Engineering Geology, 2016, 210: 23-32. doi: 10.1016/j.enggeo.2016.05.019
[3]	VILAR O M V, RODRIGUES R A R. Collapse behavior of soil in a Brazilian region affected by a rising water table[J]. Canadian Geotechnical Journal, 2011, 48(2): 226-233. doi: 10.1139/T10-065
[4]	ZHANG B Y, ZHANG J H, SUN G L. Deformation and shear strength of rockfill materials composed of soft siltstones subjected to stress, cyclical drying/wetting and temperature variations[J]. Engineering Geology, 2015, 190: 87-97. doi: 10.1016/j.enggeo.2015.03.006
[5]	MD S H, KONG L W, YIN S. Effect of drying-wetting cycles on saturated shear strength of undisturbed residual soils[J]. American Journal of Civil Engineering, 2016, 4(4): 159. doi: 10.11648/j.ajce.20160404.15
[6]	ALDAOOD A, BOUASKER M, AL-MUKHTAR M. Impact of freeze-thaw cycles on mechanical behavior of lime stabilized gypseous soils[J]. Cold Region Science and Technology, 2014, 99(1): 38-45.
[7]	黄茂松, 李进军, 李兴照. 饱和软黏土的不排水循环累积变形特性[J]. 岩土工程学报, 2006, 28(7): 891-895. http://www.cgejournal.com/cn/article/id/12119 HUANG Maosong, LI Jinjun, LI Xingzhao. Cumulative deformation behaviour of soft clay in cyclic undrained tests[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(7): 891-895. (in Chinese) http://www.cgejournal.com/cn/article/id/12119
[8]	THU T M, RAHARDJO H, LEONG E C. Elastoplastic model for unsaturated soil with incorporation of the soil-water characteristic curve[J]. Canadian Geotechnical Journal, 2007, 44(1): 67-77. doi: 10.1139/t06-091
[9]	郭林, 蔡袁强, 谷川, 等. 循环荷载下软黏土回弹和累积变形特性[J]. 浙江大学学报(工学版), 2013(12): 2111-2117. https://www.cnki.com.cn/Article/CJFDTOTAL-ZDZC201312006.htm GUO Lin, CAI Yuanqiang, GU Chuan, et al. Resilient and permanent strain behavior of soft clay under cyclic loading[J]. Journal of Zhejiang University (Engineering Science), 2013(12): 2111-2117. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZDZC201312006.htm
[10]	ZOU W L, DING L Q, HAN Z, et al. Effects of freeze-thaw cycles on the moisture sensitivity of a compacted clay[J]. Engineering Geology, 2020, 278: 105832. doi: 10.1016/j.enggeo.2020.105832
[11]	DING L Q, VANAPALLI S K, ZOU W L, et al. Freeze-thaw and wetting-drying effects on the hydromechanical behavior of a stabilized expansive soil[J]. Construction and Building Materials, 2021, 275: 122162. doi: 10.1016/j.conbuildmat.2020.122162
[12]	刘宁. 氯氧镁水泥基多相胶凝材料改性固化淤泥的路用性能研究[D]. 武汉: 武汉理工大学, 2022. LIU Ning. Study on Road Performance of Modified and Solidified Silt by Magnesium Oxychloride Cement Based Multiphase Cementifier[D]. Wuhan: Wuhan University of Technology, 2022. (in Chinese)
[13]	ARA Inc. ERES Consultants Division. Guide for Mechanistic-Empirical Design of New and Rehabilitated Pavement Structures[R]. Washington D C: Transportation Research Board, 2004.
[14]	HAN Z, VANAPALLI S K, REN J P, et al. Characterizing cyclic and static moduli and strength of compacted pavement subgrade soils considering moisture variation[J]. Soils and Foundations, 2018, 58(5): 1187-99. doi: 10.1016/j.sandf.2018.06.003
[15]	YANG S R, HUANG W H, TAI Y T. Variation of resilient modulus with soil suction for compacted subgrade soils[J]. Transportation Research Record, 2005, 1913(1): 99-106. doi: 10.1177/0361198105191300110
[16]	ZENG Z X, KONG L W, WANG M, et al. Assessment of engineering behaviour of an intensely weathered swelling mudstone under full range of seasonal variation and the relationships among measured parameters[J]. Can Geotech J 55(12): 1837-1849. doi: 10.1139/cgj-2017-0582
[17]	LU Y, LIU S H, ALONSO E, et al. Volume changes and mechanical degradation of a compacted expensive soil under freeze-thaw cycles[J]. Cold Reg Sci Technol, 2018, 157: 206-214.
[18]	Standard Test Method for Unconfined Compressive Strength of Cohesive Soil: ASTM D 2166[S]. West Conshoshocken: PA, 2016.
[19]	ZOU W, HAN Z, ZHAO G, et al. Effects of cyclic freezing and thawing on the shear behaviors of an expansive soil under a wide range of stress levels[J]. Environmental Earth Sciences, 2022, 81(3): 77.
[20]	AASHTO. Standard Method of Test for Determining Resilient Modulus of Soils and Aggregate Materials[R]. Washington D C: AASHTO, 2007.
[21]	VAN GENUCHTEN M T. A closed-form equation for predicting the hydraulic conductivity of unsaturated soils[J]. Soil Science Society of America Journal, 1980, 44(5): 892-898.
[22]	HAN Z, VANAPALLI S K. Relationship between resilient modulus and suction for compacted subgrade soils[J]. Engineering Geology, 2016, 211: 85-97.
[23]	SIVAKUMAR V, KODIKARA J, R O' H A G A N, et al. Effects of confining pressure and water content on performance of unsaturated compacted clay under repeated loading[J]. Géotechnique, 2013, 63(8): 628-640.
[24]	DAWSON A R, WELLNER F. Plastic behavior of granular materials[J]. Final report ARC project, 1999(933): 147-156.
[25]	WERKMEISTER S, DAWSON A R, WELLNER F. Permanent deformation behavior of granular materials and the shakedown concept[J]. Transportation Research Record Journal of the Transportation Research Board, 2001, 1757(1): 75-81.