Synthesis of alkali activated materials incorporating municipal solid waste incineration bottom ash

Incineration bottom ash (IBA) is the ash residue after incineration of municipal solid waste. Instead of disposing of IBA in landfills or involving costly pre-treatments, this study explores the utilization of un-treated IBA as precursor and/or gas-forming agent to synthesize (lightweight) alkali-ac...

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Main Author: Zhu, Weiping
Other Authors: En-Hua Yang
Format: Thesis-Doctor of Philosophy
Language:English
Published: Nanyang Technological University 2018
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Online Access:http://hdl.handle.net/10356/73783
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-737832023-03-03T19:28:08Z Synthesis of alkali activated materials incorporating municipal solid waste incineration bottom ash Zhu, Weiping En-Hua Yang School of Civil and Environmental Engineering EHYANG@ntu.edu.sg DRNTU::Engineering::Civil engineering Incineration bottom ash (IBA) is the ash residue after incineration of municipal solid waste. Instead of disposing of IBA in landfills or involving costly pre-treatments, this study explores the utilization of un-treated IBA as precursor and/or gas-forming agent to synthesize (lightweight) alkali-activated materials (AAMs) for civil engineering applications. Chemical structures and compositions of the resulting alkali-activated IBA (AA-IBA) binder were analysed by means of selective chemical extractions, X-ray powder diffraction (XRD), thermal gravimetric analysis (TGA), solid state nuclear magnetic resonance (NMR) spectroscopy with magic angle spinning (MAS) and Fourier-transform infrared (FTIR) spectroscopy. It was found that the AA-IBA binder mainly consists of calcium silicate hydrates and geopolymer gel. To enhance the utilization potential, IBA was classified into categories according to sizes and types (i.e. glass IBA, ferrous IBA and nonferrous IBA) for strategic utilizations. The glass IBA, rich in amorphous silica, is a suitable AAM precursor. Resulting alkali-activated glass IBA (AA-glass IBA) show compressive strength up to 70 MPa, sufficient for structural applications. The nonferrous IBA, containing more metallic aluminum, was used as gas-forming agent to aerate the AA-glass IBA. This strategic use of classified IBA resulted in lightweight aerated materials with higher strength-to-density ratio, and greater IBA utilization rate as compared to un-classified AA-IBA. Doctor of Philosophy 2018-04-11T04:03:03Z 2018-04-11T04:03:03Z 2018 Thesis-Doctor of Philosophy Zhu, W. (2018). Synthesis of alkali activated materials incorporating municipal solid waste incineration bottom ash. Doctoral thesis, Nanyang Technological University, Singapore. http://hdl.handle.net/10356/73783 en This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0). 174 p. application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Civil engineering
spellingShingle DRNTU::Engineering::Civil engineering
Zhu, Weiping
Synthesis of alkali activated materials incorporating municipal solid waste incineration bottom ash
description Incineration bottom ash (IBA) is the ash residue after incineration of municipal solid waste. Instead of disposing of IBA in landfills or involving costly pre-treatments, this study explores the utilization of un-treated IBA as precursor and/or gas-forming agent to synthesize (lightweight) alkali-activated materials (AAMs) for civil engineering applications. Chemical structures and compositions of the resulting alkali-activated IBA (AA-IBA) binder were analysed by means of selective chemical extractions, X-ray powder diffraction (XRD), thermal gravimetric analysis (TGA), solid state nuclear magnetic resonance (NMR) spectroscopy with magic angle spinning (MAS) and Fourier-transform infrared (FTIR) spectroscopy. It was found that the AA-IBA binder mainly consists of calcium silicate hydrates and geopolymer gel. To enhance the utilization potential, IBA was classified into categories according to sizes and types (i.e. glass IBA, ferrous IBA and nonferrous IBA) for strategic utilizations. The glass IBA, rich in amorphous silica, is a suitable AAM precursor. Resulting alkali-activated glass IBA (AA-glass IBA) show compressive strength up to 70 MPa, sufficient for structural applications. The nonferrous IBA, containing more metallic aluminum, was used as gas-forming agent to aerate the AA-glass IBA. This strategic use of classified IBA resulted in lightweight aerated materials with higher strength-to-density ratio, and greater IBA utilization rate as compared to un-classified AA-IBA.
author2 En-Hua Yang
author_facet En-Hua Yang
Zhu, Weiping
format Thesis-Doctor of Philosophy
author Zhu, Weiping
author_sort Zhu, Weiping
title Synthesis of alkali activated materials incorporating municipal solid waste incineration bottom ash
title_short Synthesis of alkali activated materials incorporating municipal solid waste incineration bottom ash
title_full Synthesis of alkali activated materials incorporating municipal solid waste incineration bottom ash
title_fullStr Synthesis of alkali activated materials incorporating municipal solid waste incineration bottom ash
title_full_unstemmed Synthesis of alkali activated materials incorporating municipal solid waste incineration bottom ash
title_sort synthesis of alkali activated materials incorporating municipal solid waste incineration bottom ash
publisher Nanyang Technological University
publishDate 2018
url http://hdl.handle.net/10356/73783
_version_ 1759856695713988608