Hydration of ferrite-rich Portland cement: Evaluation of Fe-hydrates and Fe uptake in calcium-silicate-hydrates
| Autor: | Takashi Chabayashi, Yogarajah Elakneswaran, Hiroyoshi Kato, Toyoharu Nawa, Krishnya Siventhirarajah, Natsumi Noguchi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
0211 other engineering and technologies Hydration 020101 civil engineering 02 engineering and technology 0201 civil engineering law.invention chemistry.chemical_compound law Ferrite (iron) Ferrite-rich cement (FC) 021105 building & construction General Materials Science Fe phases Thermodynamic modelling Civil and Structural Engineering Cement Rietveld refinement Calcium-silicate-hydrate (C-S-H) Building and Construction Thermogravimetry Thermodynamic model stomatognathic diseases Portland cement chemistry Chemical engineering Calcium silicate Mercury intrusion porosimetry |
| Zdroj: | Construction and building materials. 288:123142 |
| ISSN: | 0950-0618 |
| Popis: | The hydration process in ferrite-rich cement (FC) and its pore structure have been investigated by experimental and thermodynamic modelling techniques. X-ray diffraction (XRD)/Rietveld analysis, thermogravimetry (TG), and mercury intrusion porosimetry (MIP) were performed to study the hydration process, pore volume-pore size distributions, and Fe uptake in calcium-silicate-hydrate (C-S-H). Similar phases were found in both FC and ordinary Portland cement (OPC). The hydration degree of FC was higher at the early stage compared with that of OPC; however, the hydration of OPC exceeded that of FC after 14 days because the high amount of C2S in OPC promoted the late hydration. The XRD-TG results revealed relatively similar Fe uptake by C-S-H in both FC and OPC. The thermodynamic model confirmed the formation of a high amount of Fe phases in FC. Moreover, the model predictions agreed well with the experimental results, demonstrating the accuracy of the proposed model for FC. |
| Databáze: | OpenAIRE |
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