Research on the micro-characteristics of solidified waste sludge under the effect of three factors

YANG Hao; ZHU Jianfeng; TAO Yanli

doi:10.16030/j.cnki.issn.1000-3665.202108041

2022 Vol. 49, No. 4

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YANG Hao, ZHU Jianfeng, TAO Yanli. Research on the micro-characteristics of solidified waste sludge under the effect of three factors[J]. Hydrogeology & Engineering Geology, 2022, 49(4): 91-99. doi: 10.16030/j.cnki.issn.1000-3665.202108041

Citation:

YANG Hao, ZHU Jianfeng, TAO Yanli. Research on the micro-characteristics of solidified waste sludge under the effect of three factors[J]. Hydrogeology & Engineering Geology, 2022, 49(4): 91-99. doi: 10.16030/j.cnki.issn.1000-3665.202108041

Research on the micro-characteristics of solidified waste sludge under the effect of three factors

1.
School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou, Zhejiang　310023, China
2.
Nanjing Tech University, Nanjing, Jiangsu　211816, China
3.
Zhejiang Wuzhou Engineering Project Management Co. Ltd., Hangzhou, Zhejiang　310023, China

More Information

Corresponding author: ZHU Jianfeng, zhujianfeng0811@163.com

Received Date: 19 August 2021

Revised Date: 12 November 2021

Publish Date: 25 July 2022

Abstract

Abstract

To essentially investigate the effect-mechanism of water contents (w), curing agent dosages (W_g) and ages (T) on the mechanical behavior of stabilized waste sludge, a series of Scanning Electron Microscope (SEM) tests under different w, W_g and T are conducted by taking the waste sludge solidified by magnesium oxysulfate cement as the research object. The effects of w, W_g and T on the micro-parameters of the stabilized sludge such as contact area ratio (R_CA), average abundance (C_m) and fractal dimension (D) are addressed by using the Image Pro Plus. The results show that the increase in w will prevent the hydration of magnesium oxysulfate cement and enhance the dispersibility of the microstructure of the stabilized sludge, further decrease the values of R_CA and C_m and improve the value of D. Among the aforementioned three factors, T has a significant influence on the development of R_CA and D, and W_g plays an important role in the evolution of C_m.
- solidified sludge /
- microstructure /
- contact area ratio /
- average abundance /
- fractal dimension

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References

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