Abstract
This study aimed to maximize the utilization of contaminated marine mud and sediment for beneficial reuse by solidification/stabilization (S/S) treatment with cement and pulverized fuel ash (PFA). For the purposes of waste maximization and enhancing the mechanical property of the S/S mixtures, mixing 75% by mass of either contaminated marine mud or sediment with 20% and 5% of cement and PFA, respectively, was found to be the optimal mix design. Their unconfined compressive strengths reached up to 8.32 MPa and 4.47 MPa, respectively. Apart from the mechanical property, according to the U.S.EPA, the TCLP results show that all regulated heavy metals were immobilized to a safe level and are available for engineering application such as fill material. The results of XRD reveal that the formation of CSH gel in the S/S treated mud and sediment is responsible for the strength development and heavy metal immobilization.
Highlights
This study aimed toSmuabxmimitizteedth6e Mutialirz.at2io0n12o;f accocnetapmteindat1e4d Amuargi.ne20m1u2d and sediment for beneficial reuse by solidification/stabilization (S/S) treatment with cement and pulverized fuel ash (PFA)
It was found that PFA can successfully overcome the low strength development of cement mixed sediment and red mud
A similar reduction of optimal water content was found in a previous study (Zentar et al 2012) and the reason for such is related to the small specific area of cement
Summary
This study aimed toSmuabxmimitizteedth6e Mutialirz.at2io0n12o;f accocnetapmteindat1e4d Amuargi.ne20m1u2d and sediment for beneficial reuse by solidification/stabilization (S/S) treatment with cement and pulverized fuel ash (PFA). Two common ways to handle dredged marine mud and sediment are ocean dumping and landfill disposal. In view of the recent developments of S/S technology, dredged marine mud and sediment can be potentially reused for various construction purposes such as pavement bases (Yan et al 2014) and fill material (Zhang et al 2011). Due to the successful strength enhancement of cement mixed soil after the addition of PFA, PFA was recently studied regarding S/S processes in mud and sediment. It was found that PFA can successfully overcome the low strength development of cement mixed sediment and red mud. With all the aforementioned concerns, striking a balance between waste maximization and broadened engineering application is believed to be one of the potential perspectives in the sustainable development of S/S treatment for sediment and marine mud
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
