Mixing water treatment residual with excavation waste soil in brick and artificial aggregate making

Ch-Hpin Huang*, Jill Ruhsing Pan, Yaorey Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Scopus citations


A large quantity of water treatment residual is generated each year from fresh water treatment plants in Taiwan. Landfill disposal of the nonhazardous sludge is impractical because of the high cost of transportation and an increasing scarcity of landfill sites in Taiwan. The water treatment residual was characterized; the ceramic bodies were prepared and sintered to formulate into building bricks and artificial aggregates. The sintering temperature requirement by the water treatment residual was higher than normally practiced in brick works due to the higher Al2O3 and lower SiO2 content. The excavation waste soil, practically clay, was blended with water treatment residual to improve the brick quality. Under the commonly practiced brick-making condition, up to 15% of water treatment residual could be added to produce first grade brick specified by the National Science Council (NSC). Test results of specific gravity, water absorption, and compressive strength of the artificial aggregates confirmed its applicability in constructions as various degrees of light-weight aggregates.

Original languageEnglish
Pages (from-to)272-277
Number of pages6
JournalJournal of Environmental Engineering
Issue number2
StatePublished - 1 Feb 2005


  • Aggregation
  • Bridge construction
  • Sludge disposal
  • Taiwan
  • Waste management

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