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A conduction calorimetric study of early hydration of ordinary Portland cement/high alumina cement pastes
Conduction calorimetry was applied to an investigation of the early hydration of ordinary Portland cement (OPC)/high alumina cement (HAC) pastes. Three different rate of heat-evolution profiles were observed, depending on the HAC/OPC ratio. Relevant processes affecting heat development include ettringite formation, HAC and OPC hydration. Results from SEM examination and X-ray diffraction studies are also presented. An acceleration of OPC hydration was observed in pastes containing less than 12.5 % HAC. A similar acceleration effect on HAC hydration was also obtained with the addition of OPC. A large amount of ettringite was formed and OPC hydration delayed in the pastes containing 15 % to 30 % HAC. The latter could be one of the factors attributed to poor strength development in these HAC/OPC systems. Early hydration mechanisms of OPC/HAC systems are also discussed.
A conduction calorimetric study of early hydration of ordinary Portland cement/high alumina cement pastes
Conduction calorimetry was applied to an investigation of the early hydration of ordinary Portland cement (OPC)/high alumina cement (HAC) pastes. Three different rate of heat-evolution profiles were observed, depending on the HAC/OPC ratio. Relevant processes affecting heat development include ettringite formation, HAC and OPC hydration. Results from SEM examination and X-ray diffraction studies are also presented. An acceleration of OPC hydration was observed in pastes containing less than 12.5 % HAC. A similar acceleration effect on HAC hydration was also obtained with the addition of OPC. A large amount of ettringite was formed and OPC hydration delayed in the pastes containing 15 % to 30 % HAC. The latter could be one of the factors attributed to poor strength development in these HAC/OPC systems. Early hydration mechanisms of OPC/HAC systems are also discussed.
A conduction calorimetric study of early hydration of ordinary Portland cement/high alumina cement pastes
Untersuchung der ersten Schritte der Hydatatisierung von Pasten aus gewöhnlichem Portlandzement mit hohem Aluminiumoxidgehalt durch Leitfähigkeitskalorimetrie
Ping Gu (author) / Beaudoin, J.J. (author)
Journal of Materials Science ; 32 ; 3875-3881
1997
7 Seiten, 10 Bilder, 1 Tabelle, 22 Quellen
Article (Journal)
English
| British Library Online Contents | 1997
Early Strength Development and Hydration of Ordinary Portland Cement/Calcium Aluminate Cement Pastes
| British Library Online Contents | 1997
Early Strength Development and Hydration of Ordinary Portland Cement-Calcium Aluminate Cement Pastes
| Online Contents | 1997
Rheological Behavior of Portland Cement Pastes During Early Hydration
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Rheological behavior of Portland cement pastes during early hydration
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