Studies on the microstructure of carbon dioxide sequestered cement paste
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Bibliographic Details
| Author(s): |
Pranjal V. Chechani
(Indian Institute of Science, Bangalore, Karnataka, INDIA)
A. Ramaswamy (Indian Institute of Science, Bangalore, Karnataka, INDIA) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Congress: Engineering for Sustainable Development, New Delhi, India, 20-22 September 2023 | ||||
| Published in: | IABSE Congress New Delhi 2023 | ||||
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| Page(s): | 1357-1363 | ||||
| Total no. of pages: | 7 | ||||
| DOI: | 10.2749/newdelhi.2023.1357 | ||||
| Abstract: |
The article presents the salient findings of research to investigate the effect of varying water-to- cement ratios on CO2 sequestration in cement paste. Paste prepared using Ordinary Portland cement and tap water has been carbonated using crushed dry ice added at 4% by weight of cement in the first method of carbonation and bubbling CO2 gas directly into the mixing vessel as the second method. To study the influence of early-age carbonation on physical properties, setting time and compressive strength tests have been performed on 50mm cube specimens. Thermogravimetric analysis (TGA}, X-ray Diffraction (XRD}, and pH measurements have all been used to examine changes in the composition of the hardened cement paste caused by the aforementioned processes. The chemical and morphological variations among non-carbonated and carbonated samples have been examined using Scanning Electron Microscopy (SEM}. |
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| Keywords: |
carbon dioxide CO2 sequestration Cement Paste Dry Ice Chemical Characterization Calcite precipitation
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