Utilization of Municipal Solid Waste Incineration Bottom Ash as Fine Aggregate of Cement Mortars

Byeong-Hun Woo, In-Kyu Jeon, Dong-Ho Yoo, Seong-Soo Kim, Jeong-Bae Lee and Hong-Gi Kim
Additional contact information
Byeong-Hun Woo: Civil and Environmental Engineering Department, Hanyang University, Jaesung Civil Engineering Building, 222 Wangsimni-ro, Seongdong Gu, Seoul 04763, Korea
In-Kyu Jeon: Zachry Department of Civil & Environmental Engineering, Texas A&M University, College Station, TX 77843, USA
Dong-Ho Yoo: Civil and Environmental Engineering Department, Hanyang University, Jaesung Civil Engineering Building, 222 Wangsimni-ro, Seongdong Gu, Seoul 04763, Korea
Seong-Soo Kim: Department of Civil Engineering, Daejin University, 1007 Hoguk-ro, Pocheon-si 11159, Korea
Jeong-Bae Lee: GFC R&D Co., Ltd., 155 Hoguk-ro, Pocheon-si 11158, Korea
Hong-Gi Kim: Civil and Environmental Engineering Department, Hanyang University, Jaesung Civil Engineering Building, 222 Wangsimni-ro, Seongdong Gu, Seoul 04763, Korea

Sustainability, 2021, vol. 13, issue 16, 1-12

Abstract: Incineration bottom ash is generated by the incineration of solid waste. Household solid waste is increasing every year and so is incineration bottom ash. This is a problem to treat the incineration bottom ash because the ash has many toxic components. Cement composites can solve this problem and there are many studies for using the bottom ash as fine aggregate. To evaluate the usage of incineration bottom ash, compressive strength, mercury intrusion porosimetry, scanning electron microscopy-backscatter electron, X-ray diffraction, and toxicity characteristic leaching processes were performed. When using incineration bottom ash up to 20% of substitution, the compressive strength in all cases was increased. This study showed how the filler effect appeared well in the cement composites through the scanning electron microscopy-backscatter electron, and mercury intrusion porosimetry. X-ray diffraction indicated the possibility of an alkali-silica reaction of the aggregate with the components of incineration bottom ash. This problem is an obstacle to applying the incineration bottom ash as a fine aggregate. In addition, the toxicity characteristic leaching process was shown to be under the threshold of the Korean standard, however, this should nuanced by the consideration of amorphity. Comprehensively, incineration bottom ash could be used as a fine aggregate of up to 20% of substitution. However, the pre-treatment would need to eliminate or reduce alkali reactive components and heavy metals.

Keywords: incineration bottom ash; substitution; fine aggregate; heavy metal; leaching (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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