Strength behavior of dredged mud slurry treated jointly by cement, flocculant and vacuum preloading

被引:34
|
作者
Zhang, Rong-Jun [1 ]
Zheng, Yao-Lin [1 ]
Dong, Chao-Qiang [1 ]
Zheng, Jun-Jie [1 ]
机构
[1] Huazhong Univ Sci & Technol, Inst Geotech & Underground Engn, Wuhan 430074, Peoples R China
基金
中国国家自然科学基金;
关键词
Cement; Dehydration; Flocculant; Mud slurry; Solidification; Vacuum preloading; SEDIMENTATION BEHAVIOR; WATER-CONTENT; IMPROVEMENT; SOILS;
D O I
10.1007/s11440-021-01346-y
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
Application of the flocculation-solidification combined method (FSCM) is a rational option for treatment and recycling of dredged mud slurry at extra high water content (EHW-MS). However, FSCM tends to show some limitations when the treated EHW-MS is recycled as filling material with high requirement on mechanical properties. Via introducing the vacuum preloading (VP) and fiber reinforcement (FR) into FSCM, two novel procedures (i.e., VP-FSCM and VP-FR-FSCM) are newly developed in this study for more efficient treatment and recycling of EHW-MS. Five groups of laboratory experiments are conducted to verify the superiority of VP-FSCM and VP-FR-FSCM over FSCM in EHW-MS treatment and to characterize the effect of some key factors on the treatment efficiency of VP-FSCM and VP-FR-FSCM. The fundamental mechanisms of VP-FSCM and VP-FR-FSCM are also discussed based on the X-ray diffraction spectrums and the scanning electron microscope images. The results indicate that VP-FSCM and VP-FR-FSCM show significant superiority over FSCM in treatment and recycling of EHW-MS, and the strength of VP-FSCM or VP-FR-FSCM treated EHW-MS is at least 2.36 times larger than that of FSCM treated EHW-MS.
引用
收藏
页码:2581 / 2596
页数:16
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