Properties of Chemically Activated MSWI(Municipal Solid Waste Incinerator) Mortar

도시 폐기물 소각재를 이용한 화학적 활성화 모르타르의 특성

  • Jo, Byung-Wan (Dept. of Civil Engineering, Hanyang University) ;
  • Kim, Kwang-Il (Dept. of Civil Engineering, Hanyang University) ;
  • Park, Jong-Chil (Dept. of Civil Engineering, Hanyang University / Highway and Transportation Technology Institute) ;
  • Park, Seung-Kook (Dept. of Civil Engineering, Hanyang University)
  • 조병완 (한양대학교 토목공학과) ;
  • 김광일 (한양대학교 토목공학과) ;
  • 박종칠 (한양대학교 토목공학과 / 한국도로공사 도로교통기술원) ;
  • 박승국 (한양대학교 토목공학과)
  • Published : 2006.10.31


The recycling of industrial wastes in the concrete manufacturing is of increasing interest worldwide, due to the high environmental impact of the cement and concrete industries and to the rising demand of infrastructures, both in industrialized and developing countries. The production of municipal wastes in the South Korea is estimated at about 49,902 ton per day and only 14.5% of these are incinerated and principally disposed of in landfill. These quantities will increase considerably with the growth of municipal waste production, the progressive closing of landfill, so the disposal of municipal solid waste incinerator(MSWI) ashes has become a continuous and significant issue facing society, both environmentally and economically. MSWI ash is the residue from waste combustion processes at temperature between $850^{\circ}C\;and\;1,000^{\circ}C$. And the main components of MSWI ash are $SiO_2,\;CaO\;and\;Al_2O_3$. The aim of this study is to find a way to useful application of MSWI ash(after treatment) as a structural material and to investigates the hydraulic activity, compressive strength development composition variation of such alkali-activated MSWI ashes concrete. And it was found that early cement hydration, followed by the breakdown and dissolving of the MSWI-ashes, enhanced the formation of calcium silicate hydrates(C-S-H). The XRD and SEM-EDS results indicate that, both the hydration degree and strength development are closely connected with a curing condition and a alkali-activator. Compressive strengths with values in the 40.5 MPa were obtained after curing the activated MSWI ashes with NaOH+water glass at $90^{\circ}C$.


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