Lightweight aerated metakaolin-based geopolymer incorporating municipal solid waste incineration bottom ash as gas-forming agent
In this study, incineration bottom ash is used as the gas-forming agent, to replace costly aluminum powder, in the production of lightweight aerated metakaolin geopolymer. Results show that gas generation capacity of incineration bottom ash is about 1/250 that of aluminum powder. Addition of inciner...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/139888 |
| _version_ | 1811693660547317760 |
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| author | Zhu, Weiping Rao, Xue Hong Liu, Yiquan Yang, En-Hua |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Zhu, Weiping Rao, Xue Hong Liu, Yiquan Yang, En-Hua |
| author_sort | Zhu, Weiping |
| collection | NTU |
| description | In this study, incineration bottom ash is used as the gas-forming agent, to replace costly aluminum powder, in the production of lightweight aerated metakaolin geopolymer. Results show that gas generation capacity of incineration bottom ash is about 1/250 that of aluminum powder. Addition of incineration bottom ash remarkably increases the yield stress and viscosity of fresh pastes. As a result, incineration bottom ash aerated geopolymers possess smaller voids because higher yield stress of paste restricts expansion of gas bubble and higher viscosity of paste prevents bubble coalescence. The resulting incineration bottom ash aerated geopolymers show comparable properties to the control aluminum aerated geopolymers, with a density of as low as 860 kg/m3 and corresponding compressive strength of 5.5 MPa and thermal conductivity of 0.33 W/m-K. Incineration bottom ash thus can be considered as alternative gas-forming agent for lightweight aerated geopolymer production. |
| first_indexed | 2024-10-01T06:55:13Z |
| format | Journal Article |
| id | ntu-10356/139888 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:55:13Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1398882021-01-08T08:22:42Z Lightweight aerated metakaolin-based geopolymer incorporating municipal solid waste incineration bottom ash as gas-forming agent Zhu, Weiping Rao, Xue Hong Liu, Yiquan Yang, En-Hua School of Civil and Environmental Engineering Interdisciplinary Graduate School (IGS) Energy Research Institute @ NTU (ERI@N) Engineering::Civil engineering Lightweight Metakaolin In this study, incineration bottom ash is used as the gas-forming agent, to replace costly aluminum powder, in the production of lightweight aerated metakaolin geopolymer. Results show that gas generation capacity of incineration bottom ash is about 1/250 that of aluminum powder. Addition of incineration bottom ash remarkably increases the yield stress and viscosity of fresh pastes. As a result, incineration bottom ash aerated geopolymers possess smaller voids because higher yield stress of paste restricts expansion of gas bubble and higher viscosity of paste prevents bubble coalescence. The resulting incineration bottom ash aerated geopolymers show comparable properties to the control aluminum aerated geopolymers, with a density of as low as 860 kg/m3 and corresponding compressive strength of 5.5 MPa and thermal conductivity of 0.33 W/m-K. Incineration bottom ash thus can be considered as alternative gas-forming agent for lightweight aerated geopolymer production. NRF (Natl Research Foundation, S’pore) 2020-05-22T06:21:17Z 2020-05-22T06:21:17Z 2018 Journal Article Zhu, W., Rao, X. H., Liu, Y., & Yang, E.-H. (2018). Lightweight aerated metakaolin-based geopolymer incorporating municipal solid waste incineration bottom ash as gas-forming agent. Journal of Cleaner Production, 177, 775-781. doi:10.1016/j.jclepro.2017.12.267 0959-6526 https://hdl.handle.net/10356/139888 10.1016/j.jclepro.2017.12.267 2-s2.0-85041121811 177 775 781 en Journal of Cleaner Production © 2018 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Civil engineering Lightweight Metakaolin Zhu, Weiping Rao, Xue Hong Liu, Yiquan Yang, En-Hua Lightweight aerated metakaolin-based geopolymer incorporating municipal solid waste incineration bottom ash as gas-forming agent |
| title | Lightweight aerated metakaolin-based geopolymer incorporating municipal solid waste incineration bottom ash as gas-forming agent |
| title_full | Lightweight aerated metakaolin-based geopolymer incorporating municipal solid waste incineration bottom ash as gas-forming agent |
| title_fullStr | Lightweight aerated metakaolin-based geopolymer incorporating municipal solid waste incineration bottom ash as gas-forming agent |
| title_full_unstemmed | Lightweight aerated metakaolin-based geopolymer incorporating municipal solid waste incineration bottom ash as gas-forming agent |
| title_short | Lightweight aerated metakaolin-based geopolymer incorporating municipal solid waste incineration bottom ash as gas-forming agent |
| title_sort | lightweight aerated metakaolin based geopolymer incorporating municipal solid waste incineration bottom ash as gas forming agent |
| topic | Engineering::Civil engineering Lightweight Metakaolin |
| url | https://hdl.handle.net/10356/139888 |
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