Dynamic deformation characteristics of fiber and geopolymer-stabilized coarse-grained fillers

WANG Shengnian; GU Leilei; WU Zhijian; CUI Xiaoyan; XUE Qinpei; XU Xinlei; DAN Dong

doi:10.11779/CJGE2024S20035

Volume 46 Issue S2

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Chinese Journal of Geotechnical Engineering > 2024 > 46(S2): 183-188. > DOI: 10.11779/CJGE2024S20035

WANG Shengnian, GU Leilei, WU Zhijian, CUI Xiaoyan, XUE Qinpei, XU Xinlei, DAN Dong. Dynamic deformation characteristics of fiber and geopolymer-stabilized coarse-grained fillers[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(S2): 183-188. DOI: 10.11779/CJGE2024S20035

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Dynamic deformation characteristics of fiber and geopolymer-stabilized coarse-grained fillers

1.
College of Transportation Science & Engineering, Nanjing Tech University, Nanjing 211816, China
2.
CCCC First Highway Engineering Bureau Co., Ltd., Beijing 100024, China
3.
Chongqing Branch of China Anneng Group Third Engineering Bureau Co., Ltd., Chongqing 401320, China

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Received Date: June 20, 2024

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Abstract

Abstract

The utilization of fiber and geopolymer to stabilize coarse-grained fillers can enhance their engineering performances such as strength and rigidity, and reduce the cumulative plastic deformation caused by long-term dynamic loadings. In this study, a series of unconfined compression tests are conducted to investigate the ideal material composition design of metakaolin-based geopolymer and the optimal mixing ratio of fiber and geopolymer for soil stabilization. Then, the unconfined compressive strength and cyclic loading/unloading tests on fiber and metakaolin-based geopolymer stabilized coarse-grained fillers are carried out. Their cumulative deformation characteristics and failure modes affected by rock content and loading stress level are discussed. The results show that the ideal mixing ratio of metakaolin, Na₂SiO₃, and CaO for preparing geopolymer is 3.6:1:0.8, and their optimal dosage for soil stabilization is 15%. The optimal content and length of basalt fiber are 0.4% and 12 mm, respectively. The compressive strength of fiber and geopolymer-stabilized coarse-grained fillers increases first, then decreases, and then increases with the rock block content. Their best mechanical performances are achieved when the rock block content is 30%. The cumulative strain rate of fiber and geopolymer-stabilized coarse-grained fillers increases first, then slowly, and then rapidly as the number of cycles increases. With the increase of the rock block content and loading stress level, the number and propagation rate of cracks increase significantly, and the failure mode of fiber and geopolymer-stabilized coarse-grained fillers changes from shear-slip to vertical splitting. This study can provide references for the dynamic cognition and engineering application of fiber and geopolymer-stabilized coarse-grained fillers.
- coarse-grained filler,
- geopolymer,
- fiber,
- dynamic deformation characteristic,
- failure mode

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[1]	翟婉明, 赵春发, 夏禾, 等. 高速铁路基础结构动态性能演变及服役安全的基础科学问题[J]. 中国科学: 技术科学, 2014, 44(7): 645-660. ZHAI Wanming, ZHAO Chunfa, XIA He, et al. Basic scientific issues on dynamic performance evolution of the high-speed railway infrastructure and its service safety[J]. Scientia Sinica (Technologica), 2014, 44(7): 645-660. (in Chinese)
[2]	王晓明. 客运专线路基填料改良试验研究[J]. 铁道工程学报, 2010, 27(3): 24-27. WANG Xiaoming. Experimental study on improvement of filling material for subgrade of Harbin-Dalian passenger dedicated line[J]. Journal of Railway Engineering Society, 2010, 27(3): 24-27. (in Chinese)
[3]	石熊, 张家生, 刘蓓, 等. 高速铁路粗粒土填料级配改良试验[J]. 中南大学学报(自然科学版), 2014, 45(11): 3964-3969. SHI Xiong, ZHANG Jiasheng, LIU Bei, et al. Test of high-speed railway coarse grained filler of improved particle size distribution[J]. Journal of Central South University (Science and Technology), 2014, 45(11): 3964-3969. (in Chinese)
[4]	陈乐求, 张家生, 陈俊桦, 等. 水泥改良泥质板岩粗粒土的静动力特性试验[J]. 岩土力学, 2017, 38(7): 1903-1910. CHEN Leqiu, ZHANG Jiasheng, CHEN Junhua, et al. Testing of static and dynamic strength properties of cement-improved argillaceous-slate coarse-grained soil[J]. Rock and Soil Mechanics, 2017, 38(7): 1903-1910. (in Chinese)
[5]	ZHANG M, GUO H, EL-KORCHI T, et al. Experimental feasibility study of geopolymer as the next-generation soil stabilizer[J]. Construction and Building Materials, 2013, 47: 1468-1478. doi: 10.1016/j.conbuildmat.2013.06.017
[6]	杨广庆. 水泥改良土的动力特性试验研究[J]. 岩石力学与工程学报, 2003, 22(7): 1156-1160. YANG Guangqing. Study of dynamic performance of cement-improved soil[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(7): 1156-1160. (in Chinese)
[7]	HUANG Y C, CHEN J, TIAN A R, et al. Mechanical properties of fiber and cement reinforced heavy metal-contaminated soils as roadbed filling[J]. Journal of Central South University, 2020, 27(7): 2003-2016.
[8]	CERNI G, CARDONE F, VIRGILI A, et al. Characterisation of permanent deformation behaviour of unbound granular materials under repeated triaxial loading[J]. Construction and Building Materials, 2012, 28(1): 79-87.
[9]	RAHMAN M S, ERLINGSSON S. Modelling the moisture dependent permanent deformation behavior of unbound granular materials[J]. Procedia Engineering, 2016, 143: 921-928.
[10]	LI D Q, SELIG E T. Cumulative plastic deformation for fine-grained subgrade soils[J]. Journal of Geotechnical Engineering, 1996, 122(12): 1006-1013.
[11]	XIE L Y, XU H, WANG D J. Constitutive equation of damaged material under cyclic loading[M]//Advances in Engineering Plasticity and its Applications. Amsterdam: Elsevier, 1993: 371-376.
[12]	周文权, 冷伍明, 刘文劼, 等. 低围压循环荷载作用下饱和粗粒土的动力特性与骨干曲线模型研究[J]. 岩土力学, 2016, 37(2): 415-423. ZHOU Wenquan, LENG Wuming, LIU Wenjie, et al. Dynamic behavior and backbone curve model of saturated coarse-grained soil under cyclic loading and low confining pressure[J]. Rock and Soil Mechanics, 2016, 37(2): 415-423. (in Chinese)
[13]	郑可扬, 肖源杰, 王萌, 等. 循环移动轮载下粗粒土路基填料永久变形特性及安定分析[J]. 岩石力学与工程学报, 2020, 39(9): 1930-1943. ZHENG Keyang, XIAO Yuanjie, WANG Meng, et al. Permanent deformation characteristics and shakedown analysis of coarse-grained embankment materials under moving wheel loads[J]. Chinese Journal of Rock Mechanics and Engineering, 2020, 39(9): 1930-1943. (in Chinese)
[14]	李扬波, 张家生, 朱志辉, 等. CRTSⅢ型板式无砟轨道下路基的累积变形[J]. 华南理工大学学报(自然科学版), 2019, 47(3): 135-142. LI Yangbo, ZHANG Jiasheng, ZHU Zhihui, et al. Accumulative deformation of subgrade under CRTS Ⅲ slab track[J]. Journal of South China University of Technology (Natural Science Edition), 2019, 47(3): 135-142. (in Chinese)
[15]	刘宝, PHAM D P, 苏谦, 等. 不同含水状态下基床级配碎石填料变形特性研究[J]. 岩土力学, 2016, 37(5): 1365-1372. LIU Bao, PHONG P D, SU Qian, et al. Deformation characteristics of subgrade graded gravel with different water contents[J]. Rock and Soil Mechanics, 2016, 37(5): 1365-1372. (in Chinese)
[16]	王宇, 李晓, 李守定, 等. 单轴压缩条件下土石混合体开裂特征研究[J]. 岩石力学与工程学报, 2015, 34(增刊1): 3541-3552. WANG Yu, LI Xiao, LI Shouding, et al. Cracking deformation characteristics for rock and soil aggregate under uniaxial compressive test[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(S1): 3541-3552. (in Chinese)
[17]	金磊, 曾亚武, 张森. 块石含量及形状对胶结土石混合体力学性能影响的大型三轴试验[J]. 岩土力学, 2017, 38(1): 141-149. JIN Lei, ZENG Yawu, ZHANG Sen. Large scale triaxial tests on effects of rock block proportion and shape on mechanical properties of cemented soil-rock mixture[J]. Rock and Soil Mechanics, 2017, 38(1): 141-149. (in Chinese)