American Society of Civil Engineers


Mixing Water Treatment Residual with Excavation Waste Soil in Brick and Artificial Aggregate Making


by Chihpin Huang, (corresponding author), (Professor, Institute of Environmental Engineering, National Chiao Tung Univ., 75 Po-Ai St., Hsinchu, Taiwan, 300), Ruhsing Jill Pan, (Associate Professor, Institute of Environmental Engineering, National Chiao Tung Univ., 75 Po-Ai St., Hsinchu, Taiwan, 300.), and Yaorey Liu, (Graduate student, Institute of Environmental Engineering, National Chiao Tung Univ., 75 Po-Ai St., Hsinchu, Taiwan, 300.)

Journal of Environmental Engineering, Vol. 131, No. 2, February 2005, pp. 272-277, (doi:  http://dx.doi.org/10.1061/(ASCE)0733-9372(2005)131:2(272))

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Document type: Journal Paper
Abstract: 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.


ASCE Subject Headings:
Aggregates
Bridges
Construction
Sludge
Taiwan
Waste disposal
Waste management