Production and Characterization of Eco-Cement from Municipal Solid Waste Incineration Residues
نام عام مواد
[Thesis]
نام نخستين پديدآور
Ashraf, Muhammad Shoaib
نام ساير پديدآوران
Shao, Yixin
وضعیت نشر و پخش و غیره
نام ناشر، پخش کننده و غيره
McGill University (Canada)
تاریخ نشرو بخش و غیره
2019
مشخصات ظاهری
نام خاص و کميت اثر
181
یادداشتهای مربوط به پایان نامه ها
جزئيات پايان نامه و نوع درجه آن
Ph.D.
کسي که مدرک را اعطا کرده
McGill University (Canada)
امتياز متن
2019
یادداشتهای مربوط به خلاصه یا چکیده
متن يادداشت
This research program was aimed at developing cement ecologically from municipal solid waste incineration (MSWI) residues utilizing the wastes, reducing carbon emission and minimizing the natural resource consumption. Two types of eco-cements were produced; one with 100% MSWI residues and the other with 94% MSWI residues and 6% additives, with a clinkering temperature of 1100°C. The eco-cement demonstrated non-hydraulic behavior; however, it could be consolidated upon carbonation activation, forming a binding matrix comprised of amorphous calcium silicate hydrocarbonate, CaCO3, and gypsum. Carbonation activation of eco-cement for two hours showed compressive strength comparable to the 28 days strength of ordinary Portland cement upon hydration. Carbonation up to twelve hours further improved the compressive strength by 50% in comparison to the two hours results. Microstructural studies confirmed chloroellestadite (CE) and belite as the main strength contributors along with CO2 reactive phases in the eco-cement. For a better understanding of the carbonation reactivity and strength contribution of these phases, both chloroellestadite and belite were synthesized. Carbonation cured synthesized CE and belite showed strength behavior similar to that of eco-cement, and the carbonation-derived phases of synthesized compounds confirmed the development of CaCO3, gypsum, and calcium silicate hydrocarbonate as a strength contributing matrix. Eco-concrete slabs were produced to assess the binding properties of the eco-cement with compressive strength comparable to that of OPC concrete. Finally, extensive environmental testing results showed that the clinkering and carbonation curing process helped immobilize the hazardous elements such as heavy metals, organic compounds and dioxin, and furans. These results show that eco-cement can be safely used in commercial applications.
موضوع (اسم عام یاعبارت اسمی عام)
موضوع مستند نشده
Civil engineering
موضوع مستند نشده
Environmental engineering
نام شخص به منزله سر شناسه - (مسئولیت معنوی درجه اول )