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Geomechanics and Engineering Volume 41, Number 2, April25 2025 (Special Issue) pages 307-318 DOI: https://doi.org/10.12989/gae.2025.41.2.307 |
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 open accessUtilization of paper sludge ash in geotechnical engineering – Review |
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Kyungwon Park, Hoyoung Lee, Junwoo Shin,
Byounghooi Choi, Jinwoo An, Jiannan Chen and Boo Hyun Nam
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| Abstract | ||
| The pulp and paper industry has grown and created tremendous volumes of byproducts (e.g., fly ash) via combustion process. Unfortunately, most of them are being landfilled; in the meantime, environmental regulations restrict the disposal in landfill because of high disposal cost and reduced land due to urbanization. Therefore, the pulp and paper industries urgently seek for its beneficial reuse and one of the most cost-effective applications is a building and construction sector, particularly its reuse as geomaterials such as stabilizing soils. This paper provides a comprehensive review of the beneficial use of the paper sludge ash (PSA) in geotechnical engineering applications. Specifically, the paper explored the state-of-the-art knowledge in the areas of physical, chemical, and mineralogical properties of PSA, geotechnical engineering properties (e.g., strength, stiffness, shear strength parameters, etc.) and field applications of the PSA. In addition, the paper looks into geo-environmental applications such as PSA' s water absorption and retention performance and its performance as adsorbent for environmental contaminants. | ||
| Key Words | ||
| incineration; paper sludge ash; soil stabilization; strength | ||
| Address | ||
| Kyungwon Park, Hoyoung Lee,Byounghooi Choi and Boo Hyun Nam: Department of Civil Engineering, College of Engineering, Kyung Hee University, Yongin, Republic of Korea Junwoo Shin: Department of Civil Engineering, Kumoh National Institute of Technology, Republic of Korea Jinwoo An: Department of Civil Engineering, University of Texas at Rio Grande Valley, USA Jiannan Chen: Department of Civil, Environmental, and Construction Engineering, University of Central Florida, USA | ||