Affiliation:
1. Indian Institute of Science, Bangalore, Karnataka, INDIA
Abstract
<p>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}.</p>
Publisher
International Association for Bridge and Structural Engineering (IABSE)
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