Research on the Solidification Characteristics of High Organic Matter Sludge and Its Composite Enhancement Effect

DOI

10.2991/978-94-6463-902-5_54How to use a DOI?

Keywords

Organic matter; silt; solidified soil; solidifying agent

Abstract

Based on the analysis of the physical and chemical properties of silt, and with ordinary cement as the control, the compressive strength, shear strength, water erosion resistance and dry-wet cycle durability of silt with different organic matter contents (5%, 6.5%, 8.5%, 10.5%, 12.5%) under the action of composite curing agents were studied. The results show that the composite curing agent can effectively solidify the sludge under different organic matter contents. With the increase of organic matter content, the performance of solidified soil shows a downward trend. When the organic matter content reached 12.5%, the 7-day and 28-day unconfined compressive strengths of the composite solidified soil dropped to 396.38 kPa and 802.62 kPa respectively. Compared with the 5% organic matter silt specimens, they decreased by 81.23% and 78.71% respectively. After five dry-wet cycles, the strength retention rate of the composite solidified soil specimens remained at 63%, while that of the cement solidified soil was only 46%.The composite curing agent effectively enhances the mechanical durability of the cured soil based on the multiple effects of ettringite expansion and alkali activation. The research can provide reference and inspiration for the efficient curing of organic sludge.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Hua Zhai
AU  - Xuehong Xu
AU  - Tao Zhang
AU  - Qiwei Liu
AU  - Jiali Peng
AU  - Chaohua Jiang
PY  - 2025
DA  - 2025/12/16
TI  - Research on the Solidification Characteristics of High Organic Matter Sludge and Its Composite Enhancement Effect
BT  - Proceedings of the 2025 7th International Conference on Civil Engineering, Environment Resources and Energy Materials (CCESEM 2025)
PB  - Atlantis Press
SP  - 545
EP  - 551
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-902-5_54
DO  - 10.2991/978-94-6463-902-5_54
ID  - Zhai2025
ER  -