Mechanical and Environmental Performance of Cement-Eucalyptus Ash Stabilized Dam Sediments for Sustainable Road Construction
บทความในวารสาร
ผู้เขียน/บรรณาธิการ
กลุ่มสาขาการวิจัยเชิงกลยุทธ์
รายละเอียดสำหรับงานพิมพ์
รายชื่อผู้แต่ง: Jamnongwong M.; Wongvatana N.; Noorak A.; Jongpradist P.; Chaiprakaikeow S.; Jamsawang P.
ผู้เผยแพร่: Springer
ปีที่เผยแพร่ (ค.ศ.): 2025
Volume number: 11
Issue number: 3
นอก: 2199-9260
eISSN: 2199-9279
ภาษา: English-Great Britain (EN-GB)
บทคัดย่อ
This study investigates the potential of dam sediments, typically considered waste, as a sustainable material for road construction by stabilizing them with eucalyptus ash (EA) and cement. EA, recognized for its pozzolanic activity, was blended with cement to enhance both the mechanical strength and environmental performance of the sediments. Destructive tests—namely unconfined compressive strength and California bearing ratio—revealed that a 10% EA-cement blend significantly improved mechanical properties, with the unconfined compressive strength reaching 2.25 MPa—nearly five times higher than that of untreated sediments. Nondestructive free-free resonance tests supported these findings, showing increased wave velocities that reflect greater material stiffness and strength. The microstructural analysis confirmed the formation of calcium silicate hydrate gels, contributing to matrix densification and stronger interparticle bonding. Leaching tests demonstrated that all heavy metal concentrations in the stabilized samples were well below the regulatory thresholds, with some metals below detection limits. Groundwater quality assessment further confirmed that the leachate was chemically and microbiologically safe, with all parameters meeting the standards set by the Pollution Control Department of Thailand. These results affirm the environmental compatibility of the stabilized sediments. Additionally, cost analysis indicated that using EA-cement-stabilized sediments could be 5.7 times more cost-effective than conventional materials due to reduced material and transportation costs. Collectively, the mechanical, microstructural, environmental, and economic outcomes support the use of EA-cement-stabilized dam sediments as a sustainable and viable alternative in road construction. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2025.
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