Microstructure and nanoscaled characterization of HVFA cement paste containing Nano-SiO2 and Nano-CaCO3
This paper presents the effects of nano-SiO 2 and nano-CaCO 3 on the microstructure of high-volume fly ash (HVFA) cement paste. The microstructures of HVFA cement pastes containing 40 and 60% Class F fly ash were evaluated at 28 days using nanoindentation, X-ray diffraction (XRD), thermogravimetri...
| Main Authors: | , , |
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| Format: | Journal Article |
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American Society of Civil Engineers (ASCE)
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/55641 |
| _version_ | 1848759672094326784 |
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| author | Shaikh, Faiz Supit, S. Barbhuiya, Salim |
| author_facet | Shaikh, Faiz Supit, S. Barbhuiya, Salim |
| author_sort | Shaikh, Faiz |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This paper presents the effects of nano-SiO 2 and nano-CaCO 3 on the microstructure of high-volume fly ash (HVFA) cement paste. The microstructures of HVFA cement pastes containing 40 and 60% Class F fly ash were evaluated at 28 days using nanoindentation, X-ray diffraction (XRD), thermogravimetric (DTA/TGA), and mercury intrusion porosimetry (MIP) analyses. A reduction of calcium hydroxide (CH) was seen in XRD analysis of HVFA pastes containing nanoparticles. This observation was also confirmed in the DTA/TGA analysis. The nanoindentation results also showed the evidence of pozzolanic reaction in the HVFA pastes, where the addition of 2% nano-SiO 2 and 1% nano-CaCO 3 increased the volume fractions of high-density and low-density calcium silicate hydrate (C- S- H) gels and confirmed the ability of nanoparticles to reduce the porosity of HVFA pastes, which was consistent with the MIP analysis. The improved nanostructure and microstructure of HVFA pastes due to the addition of nano-SiO 2 and nano-CaCO 3 in this study show that high-strength and highly durable sustainable concrete can be produced with lower repair and maintenance requirements for the concrete structures. |
| first_indexed | 2025-11-14T10:03:36Z |
| format | Journal Article |
| id | curtin-20.500.11937-55641 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:03:36Z |
| publishDate | 2017 |
| publisher | American Society of Civil Engineers (ASCE) |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-556412018-04-13T06:01:56Z Microstructure and nanoscaled characterization of HVFA cement paste containing Nano-SiO2 and Nano-CaCO3 Shaikh, Faiz Supit, S. Barbhuiya, Salim This paper presents the effects of nano-SiO 2 and nano-CaCO 3 on the microstructure of high-volume fly ash (HVFA) cement paste. The microstructures of HVFA cement pastes containing 40 and 60% Class F fly ash were evaluated at 28 days using nanoindentation, X-ray diffraction (XRD), thermogravimetric (DTA/TGA), and mercury intrusion porosimetry (MIP) analyses. A reduction of calcium hydroxide (CH) was seen in XRD analysis of HVFA pastes containing nanoparticles. This observation was also confirmed in the DTA/TGA analysis. The nanoindentation results also showed the evidence of pozzolanic reaction in the HVFA pastes, where the addition of 2% nano-SiO 2 and 1% nano-CaCO 3 increased the volume fractions of high-density and low-density calcium silicate hydrate (C- S- H) gels and confirmed the ability of nanoparticles to reduce the porosity of HVFA pastes, which was consistent with the MIP analysis. The improved nanostructure and microstructure of HVFA pastes due to the addition of nano-SiO 2 and nano-CaCO 3 in this study show that high-strength and highly durable sustainable concrete can be produced with lower repair and maintenance requirements for the concrete structures. 2017 Journal Article http://hdl.handle.net/20.500.11937/55641 10.1061/(ASCE)MT.1943-5533.0001898 American Society of Civil Engineers (ASCE) restricted |
| spellingShingle | Shaikh, Faiz Supit, S. Barbhuiya, Salim Microstructure and nanoscaled characterization of HVFA cement paste containing Nano-SiO2 and Nano-CaCO3 |
| title | Microstructure and nanoscaled characterization of HVFA cement paste containing Nano-SiO2 and Nano-CaCO3 |
| title_full | Microstructure and nanoscaled characterization of HVFA cement paste containing Nano-SiO2 and Nano-CaCO3 |
| title_fullStr | Microstructure and nanoscaled characterization of HVFA cement paste containing Nano-SiO2 and Nano-CaCO3 |
| title_full_unstemmed | Microstructure and nanoscaled characterization of HVFA cement paste containing Nano-SiO2 and Nano-CaCO3 |
| title_short | Microstructure and nanoscaled characterization of HVFA cement paste containing Nano-SiO2 and Nano-CaCO3 |
| title_sort | microstructure and nanoscaled characterization of hvfa cement paste containing nano-sio2 and nano-caco3 |
| url | http://hdl.handle.net/20.500.11937/55641 |