Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effects of post-hydrating Portland cement particles in the hardened cement matrix
In this research project different Portland cement pastes with low water/cement ratios - as used in high performance concretes - were stored under water at 8 deg C, 20 deg C and 50 deg C for up to 360 days. Afterwards the samples were investigated with regard to a possible expansion and change in microstructure due to secondary hydration of clinker relicts with additional water in the hardened cement paste. Industrial and laboratory made Portland cements with lime saturation factors between 0.85 and 0.99 and specific surfaces between 2300 and 4100 cm(exp2)/g were used to prepare cement pastes with w/c-ratios of 0.35 and 0.20. Beside the length change the following examinations were carried out: X-ray diffraction, mercury intrusion porosimetry, scanning electron microscopy, metallographic UV-microscopy.
Effects of post-hydrating Portland cement particles in the hardened cement matrix
In this research project different Portland cement pastes with low water/cement ratios - as used in high performance concretes - were stored under water at 8 deg C, 20 deg C and 50 deg C for up to 360 days. Afterwards the samples were investigated with regard to a possible expansion and change in microstructure due to secondary hydration of clinker relicts with additional water in the hardened cement paste. Industrial and laboratory made Portland cements with lime saturation factors between 0.85 and 0.99 and specific surfaces between 2300 and 4100 cm(exp2)/g were used to prepare cement pastes with w/c-ratios of 0.35 and 0.20. Beside the length change the following examinations were carried out: X-ray diffraction, mercury intrusion porosimetry, scanning electron microscopy, metallographic UV-microscopy.
Effects of post-hydrating Portland cement particles in the hardened cement matrix
Wirkung von nachhydrierten Portlandzementpartikeln in der erhärteten Zementsteinmatrix
Hofheinz, C. (Autor:in) / Winnefeld, F. (Autor:in) / Knöfel, D. (Autor:in)
2001
14 Seiten, 16 Bilder, 1 Tabelle, 19 Quellen
Aufsatz (Konferenz)
Englisch
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