TY - JOUR
T1 - Effect of incinerator bottom-ash composition on the mechanical behavior of backfill material
AU - Lin, Chiou Liang
AU - Weng, Meng-Chia
AU - Chang, Chih Hung
PY - 2012/12/30
Y1 - 2012/12/30
N2 - This study explores the influence of the chemical composition (SiO2, CaO, Fe2O3, and Al2O3) of incinerator bottom ash on its friction angle. Direct shear tests were performed to measure the strength of bottom ash with two distinctly different compositions. Then, an empirical equation was regressed to determine the correlation between each composition and the friction angle. The experimental results showed that the main constituent material of the incinerator bottom ash from general municipal wastes is SiO2, and the friction angle is 48.04°-52.66°. The bottom ash from incineration plants treating both municipal wastes and general industrial wastes has a high content of iron-aluminum oxides, and its friction angle is 44.60°-52.52°. According to the multivariate regression analysis result, the friction angle of bottom ash of any composition is influenced mainly by the Fe2O3 and Al2O3 contents. This study used the friction angle of the bottom ash from four different incineration plants to validate the empirical equation, and found that the error between actual friction angles and the predicted values was -1.36% to 5.34%. Therefore, the regressed empirical equation in this study can be employed in engineering applications to preliminarily identify the backfill quality of incinerator bottom ash.
AB - This study explores the influence of the chemical composition (SiO2, CaO, Fe2O3, and Al2O3) of incinerator bottom ash on its friction angle. Direct shear tests were performed to measure the strength of bottom ash with two distinctly different compositions. Then, an empirical equation was regressed to determine the correlation between each composition and the friction angle. The experimental results showed that the main constituent material of the incinerator bottom ash from general municipal wastes is SiO2, and the friction angle is 48.04°-52.66°. The bottom ash from incineration plants treating both municipal wastes and general industrial wastes has a high content of iron-aluminum oxides, and its friction angle is 44.60°-52.52°. According to the multivariate regression analysis result, the friction angle of bottom ash of any composition is influenced mainly by the Fe2O3 and Al2O3 contents. This study used the friction angle of the bottom ash from four different incineration plants to validate the empirical equation, and found that the error between actual friction angles and the predicted values was -1.36% to 5.34%. Therefore, the regressed empirical equation in this study can be employed in engineering applications to preliminarily identify the backfill quality of incinerator bottom ash.
KW - Chemical composition
KW - Friction angle
KW - Incinerator bottom ash
UR - http://www.scopus.com/inward/record.url?scp=84869874801&partnerID=8YFLogxK
U2 - 10.1016/j.jenvman.2012.09.013
DO - 10.1016/j.jenvman.2012.09.013
M3 - Article
C2 - 23084273
AN - SCOPUS:84869874801
SN - 0301-4797
VL - 113
SP - 377
EP - 382
JO - Journal of Environmental Management
JF - Journal of Environmental Management
ER -