Recycling of harbor sediment as lightweight aggregate

Yu Ling Wei, Jing Chiang Yang, Yong Yang Lin, Shih Yu Chuang, Hong-Paul Wang

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Sediment sampled from Taichung Harbor was mixed with local reservoir sediment at different weight ratios to prepare lightweight aggregate at 1050, 1100, and 1150 °C. A pressure of 3000 or 5000 psi was used to shape the powder mixtures into pellets before the heating processes. The results indicate that the leaching levels of trace metals from the lightweight aggregate samples are considerably reduced to levels less than Taiwan Environmental Protection Administration regulatory limits. Increasing final process temperature tends to reduce the bulk density and crushing intensity of lightweight aggregate with a concomitant increase in water sorption capability. Lightweight aggregate with the lowest bulk density, 0.49 g cm-3 for the 5000 psi sample, was obtained with the heating process to 1150 °C. Based on the X-ray absorption near edge structure results, FeSO4 decomposition with a concomitant release of SOx (x = 2, 3) is suggested to play an important role for the bloating process in present study.

Original languageEnglish
Pages (from-to)867-872
Number of pages6
JournalMarine Pollution Bulletin
Volume57
Issue number6-12
DOIs
Publication statusPublished - 2008 May 9

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Aquatic Science
  • Pollution

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