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Mechanical properties of solidified dredged soils considering the effects of compaction degree and residual moisture content

文献类型：期刊论文

作者Feng, Dianzhi1,2; Liang, Bing2; Sun, Weiji2; He, Xingxing3; Yi, Fu2; Wan, Yong1
刊名DEVELOPMENTS IN THE BUILT ENVIRONMENT
出版日期2023-12-01
卷号16页码:13
关键词Mechanical properties Degree of compaction Biopolymer Jute fiber (JF) Residual moisture content (RMC)
DOI10.1016/j.dibe.2023.100235
英文摘要The use of biopolymers in combination with natural plant fibers to solidify soils has proven effective in civil engineering, as they are not only considered sustainable, but also have excellent mechanical properties. However, the specific quantitative relationships between mechanical strength and residual moisture content (RMC) in the cured system are still unclear. In this study, the solidification effects of xanthan gum (XG, weight ratio to dry soil of 1.5%) and jute fiber (JF, weight ratio to dry soil of 0.6% and length of 20 mm) on the Yellow River dredged soil (YRDS) were investigated at different degrees of compaction (90%, 94% and 98%) after reaching a preset RMC (75%, 50%, 25% and 0%). The results show that unconfined compressive strength (UCS) and splitting tensile strength (STS) increase significantly with decreasing RMC and increasing compaction. The effect of internal moisture on STS was even more dramatic, with a maximum increase of 404% especially when the RMC was reduced from 25% to 0%. The contribution rate of strength (Rcsi) of UCS reaches 49.09%-51.85%, while the Rcsi values of STS at the same RMC of 25% reach only 19.86%-23.08%. A logistic function based model can predict well the mechanical strength at different RMC (R2 >= 0.9789). MIP and SEM results show that increasing the degree of compaction mainly affects the large pores (20-100 mu m) and improves the mechanical strength by enhancing the bonding effect between XG and JF in the soil particles. In addition, 94% compaction ratio is an optimal choice for practical engineering applications.
资助项目Major science and technology program of Inner Mongolia, China[2021ZD0007] ; National Natural Science Foundation of China[51979267] ; National Natural Science Foundation of China[52074143] ; National Natural Science Foundation of China[5197091360]
WOS研究方向Construction & Building Technology ; Engineering
语种英语
WOS记录号WOS:001088516300001
出版者ELSEVIER
源URL[http://119.78.100.198/handle/2S6PX9GI/39701]  
专题中科院武汉岩土力学所
通讯作者Liang, Bing; He, Xingxing
作者单位1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
2.Liaoning Tech Univ, Sch Mech & Engn, Fuxing 123000, Liaoning, Peoples R China
3.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China
推荐引用方式
GB/T 7714		 Feng, Dianzhi,Liang, Bing,Sun, Weiji,et al. Mechanical properties of solidified dredged soils considering the effects of compaction degree and residual moisture content[J]. DEVELOPMENTS IN THE BUILT ENVIRONMENT,2023,16:13.
APA Feng, Dianzhi,Liang, Bing,Sun, Weiji,He, Xingxing,Yi, Fu,&Wan, Yong.(2023).Mechanical properties of solidified dredged soils considering the effects of compaction degree and residual moisture content.DEVELOPMENTS IN THE BUILT ENVIRONMENT,16,13.
MLA Feng, Dianzhi,et al."Mechanical properties of solidified dredged soils considering the effects of compaction degree and residual moisture content".DEVELOPMENTS IN THE BUILT ENVIRONMENT 16(2023):13.

入库方式： OAI收割

来源：武汉岩土力学研究所

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