Version 1
: Received: 22 October 2018 / Approved: 23 October 2018 / Online: 23 October 2018 (08:10:14 CEST)
Version 2
: Received: 6 May 2020 / Approved: 6 May 2020 / Online: 6 May 2020 (14:50:13 CEST)
How to cite:
Rodríguez-Sánchez, J.; Liberto, T.; Barentin, C.; Dysthe, D.K. Mechanisms of Phase Transformation and Creating Mechanical Strength in a Sustainable Calcium Carbonate Cement. Preprints2018, 2018100526. https://doi.org/10.20944/preprints201810.0526.v1
Rodríguez-Sánchez, J.; Liberto, T.; Barentin, C.; Dysthe, D.K. Mechanisms of Phase Transformation and Creating Mechanical Strength in a Sustainable Calcium Carbonate Cement. Preprints 2018, 2018100526. https://doi.org/10.20944/preprints201810.0526.v1
Rodríguez-Sánchez, J.; Liberto, T.; Barentin, C.; Dysthe, D.K. Mechanisms of Phase Transformation and Creating Mechanical Strength in a Sustainable Calcium Carbonate Cement. Preprints2018, 2018100526. https://doi.org/10.20944/preprints201810.0526.v1
APA Style
Rodríguez-Sánchez, J., Liberto, T., Barentin, C., & Dysthe, D.K. (2018). Mechanisms of Phase Transformation and Creating Mechanical Strength in a Sustainable Calcium Carbonate Cement. Preprints. https://doi.org/10.20944/preprints201810.0526.v1
Chicago/Turabian Style
Rodríguez-Sánchez, J., Catherine Barentin and Dag Kristian Dysthe. 2018 "Mechanisms of Phase Transformation and Creating Mechanical Strength in a Sustainable Calcium Carbonate Cement" Preprints. https://doi.org/10.20944/preprints201810.0526.v1
Abstract
Calcium carbonate cements have been synthesized by mixing amorphous calcium carbonate and vaterite powders with water to unravel the mechanisms of creating mechanical strength during the setting reaction. In-situ XRD was used to monitor the transformation of ACC and vaterite phases into calcite. Unlike this transformation of crystals suspended in a stirred solution, the transformation in the cement is controlled by vaterite dissolution. The supersaturation within the cement paste, Ω, depends not only on the bulk free energy difference of the phases, ΔG, but also on the grain size evolution. Among the strengthening mechanisms, an initial geometric reorganization of CaCO3 particles has been identified by rheological measurements; followed by the formation of an interconnected network of calcite crystals that increases in strength as the crystals grow and form bridges among them. All compositions yield microporous calcite structures with diverse transformation history, crystal bridging efficiency, and hence final mechanical properties.
Chemistry and Materials Science, Materials Science and Technology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.