The effect of ordinary portland cement substitution on the thermal stability of geopolymer concrete
© 2019 by the authors. The influence of using cement on the residual properties of fly ash geopolymer concrete (FAGC) after exposure to high temperature of up to 800 °C was studied in terms of mass loss, residual compressive strength and microstructure. The mass loss was found to increase with the i...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Journal Article |
| Language: | English |
| Published: |
2019
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/76281 |
| _version_ | 1848763662068613120 |
|---|---|
| author | Zhang, Hongen Li, L. Long, T. Sarker, Prabir Shi, X. Cai, G. Wang, Q. |
| author_facet | Zhang, Hongen Li, L. Long, T. Sarker, Prabir Shi, X. Cai, G. Wang, Q. |
| author_sort | Zhang, Hongen |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2019 by the authors. The influence of using cement on the residual properties of fly ash geopolymer concrete (FAGC) after exposure to high temperature of up to 800 °C was studied in terms of mass loss, residual compressive strength and microstructure. The mass loss was found to increase with the increase of exposure temperature, which is attributed to vaporization of water and dehydroxylation of sodium aluminosilicate hydrate (N-A-S-H) gels. The dehydroxylation of calcium silicate hydrate (C-S-H) gels and the disintegration of portlandite were responsible for higher mass loss ratio of FAGCs containing cement. The results showed that cement could increase compressive strength of FAGCs up to 200 °C, after which a significant reduction in residual strength was observed. It was found that FAGCs without cement yielded higher residual strength than the original strength after heating up to 600 °C. The observed increase of compressive strength up to 200 °C was attributed to the secondary geopolymerization which was evidenced in the scanning electronic microscopy (SEM) images. |
| first_indexed | 2025-11-14T11:07:01Z |
| format | Journal Article |
| id | curtin-20.500.11937-76281 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | eng |
| last_indexed | 2025-11-14T11:07:01Z |
| publishDate | 2019 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-762812021-01-05T08:07:08Z The effect of ordinary portland cement substitution on the thermal stability of geopolymer concrete Zhang, Hongen Li, L. Long, T. Sarker, Prabir Shi, X. Cai, G. Wang, Q. elevated temperatures geopolymer concrete mass loss ratio residual compressive strength secondary geopolymerization © 2019 by the authors. The influence of using cement on the residual properties of fly ash geopolymer concrete (FAGC) after exposure to high temperature of up to 800 °C was studied in terms of mass loss, residual compressive strength and microstructure. The mass loss was found to increase with the increase of exposure temperature, which is attributed to vaporization of water and dehydroxylation of sodium aluminosilicate hydrate (N-A-S-H) gels. The dehydroxylation of calcium silicate hydrate (C-S-H) gels and the disintegration of portlandite were responsible for higher mass loss ratio of FAGCs containing cement. The results showed that cement could increase compressive strength of FAGCs up to 200 °C, after which a significant reduction in residual strength was observed. It was found that FAGCs without cement yielded higher residual strength than the original strength after heating up to 600 °C. The observed increase of compressive strength up to 200 °C was attributed to the secondary geopolymerization which was evidenced in the scanning electronic microscopy (SEM) images. 2019 Journal Article http://hdl.handle.net/20.500.11937/76281 10.3390/ma12162501 eng http://creativecommons.org/licenses/by/4.0/ fulltext |
| spellingShingle | elevated temperatures geopolymer concrete mass loss ratio residual compressive strength secondary geopolymerization Zhang, Hongen Li, L. Long, T. Sarker, Prabir Shi, X. Cai, G. Wang, Q. The effect of ordinary portland cement substitution on the thermal stability of geopolymer concrete |
| title | The effect of ordinary portland cement substitution on the thermal stability of geopolymer concrete |
| title_full | The effect of ordinary portland cement substitution on the thermal stability of geopolymer concrete |
| title_fullStr | The effect of ordinary portland cement substitution on the thermal stability of geopolymer concrete |
| title_full_unstemmed | The effect of ordinary portland cement substitution on the thermal stability of geopolymer concrete |
| title_short | The effect of ordinary portland cement substitution on the thermal stability of geopolymer concrete |
| title_sort | effect of ordinary portland cement substitution on the thermal stability of geopolymer concrete |
| topic | elevated temperatures geopolymer concrete mass loss ratio residual compressive strength secondary geopolymerization |
| url | http://hdl.handle.net/20.500.11937/76281 |