New Applications of Ordinary Portland and Calcium Sulfoaluminate Composite Binder for Recycling Dredged Marine Sediments as Road Materials
In this study, systematic investigations were conducted to solidify dredged marine sediments using the low-carbon composite binder made by mixing Ordinary Portland and calcium sulfoaluminate cement (OPC–CSA). A series of tests to evaluate physical and mechanical properties of samples, which indicated that the OPC–CSA composite binder could effectively improve the engineering characteristics of solidified dredged marine sediments, such as the immediate California Bearing Ratio (I-CBR) index, unconfined compressive strength, splitting tensile strength, and elastic modulus. In addition, simple models were proposed to correlate the unconfined compressive and splitting tensile strength with the elastic modulus of treated sediments. Importantly, the elastic modulus of treated sediments was defined by the local small-strain sensor method. In addition, the correlation between the strength and the three kinds of failure mode of the specimens was revealed. Lastly, simplified carbon footprint analysis indicated that OPC–CSA composite binder offers potential CO₂ emissions savings of 14%–41%. The laboratory tests have revealed that the mechanical and environmental behaviors of solidified dredged marine sediments meet the environmental and engineering requirements of the standards and regulations. Low-carbon and sustainable OPC–CSA composite binder-solidified dredged marine sediments could be reused as subbase or roadbed infill materials for low traffic.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/15323641
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Supplemental Notes:
- © 2022 American Society of Civil Engineers.
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Authors:
- Wang, Hongwei
- Zentar, Rachid
- Wang, Dongxing
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0000-0001-9935-6442
- Ouendi, Fatima
- Publication Date: 2022-6
Language
- English
Media Info
- Media Type: Web
- Pagination: 04022068
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Serial:
- International Journal of Geomechanics
- Volume: 22
- Issue Number: 6
- Publisher: American Society of Civil Engineers
- ISSN: 1532-3641
- EISSN: 1943-5622
- Serial URL: http://ascelibrary.org/journal/ijgnai
Subject/Index Terms
- TRT Terms: Binders; Composite materials; Dredged materials; Portland cement; Road materials; Sediments
- Subject Areas: Highways; Materials; Pavements;
Filing Info
- Accession Number: 01845652
- Record Type: Publication
- Files: TRIS, ASCE
- Created Date: May 19 2022 10:40AM