Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Characterization and evaluation of the pozzolanic activity of Egyptian industrial by-products: I: Silica fume and dealuminated kaolin
Silica fume (SF) and dealuminated kaolin (DK) from Egyptian sources have been characterized chemically and mineralogically, and a comparative study of their reactivities toward lime were conducted using isothermal conduction calorimetry and an accelerated chemical method. The kinetics of SF-lime and DK-lime reaction were investigated in suspension. Unreacted lime and combined water were determined as function of time, and the hydration products were identified with X-ray diffraction (XRD) and SEM combined with EDX. DK has a much higher surface area (90.5 m2/g) than SF (18.6 m2 /g) and exhibits much higher pozzolanic activity, especially during early hydration. A low-density sponge-like CSH was formed, from both SF and DK at low lime contents (20% CH), and a more dense CSH was formed at higher lime contents (40% CH).
Characterization and evaluation of the pozzolanic activity of Egyptian industrial by-products: I: Silica fume and dealuminated kaolin
Silica fume (SF) and dealuminated kaolin (DK) from Egyptian sources have been characterized chemically and mineralogically, and a comparative study of their reactivities toward lime were conducted using isothermal conduction calorimetry and an accelerated chemical method. The kinetics of SF-lime and DK-lime reaction were investigated in suspension. Unreacted lime and combined water were determined as function of time, and the hydration products were identified with X-ray diffraction (XRD) and SEM combined with EDX. DK has a much higher surface area (90.5 m2/g) than SF (18.6 m2 /g) and exhibits much higher pozzolanic activity, especially during early hydration. A low-density sponge-like CSH was formed, from both SF and DK at low lime contents (20% CH), and a more dense CSH was formed at higher lime contents (40% CH).
Characterization and evaluation of the pozzolanic activity of Egyptian industrial by-products: I: Silica fume and dealuminated kaolin
Mostafa, N.Y. (Autor:in) / El-Hemaly, S.A.S. (Autor:in) / Al-Wakeel, E.I. (Autor:in) / El-Korashy, S.A. (Autor:in) / Brown, P.W. (Autor:in)
Cement and Concrete Research ; 31 ; 467-474
2001
8 Seiten, 37 Quellen
Aufsatz (Zeitschrift)
Englisch
Activity of silica fume and dealuminated kaolin at different temperatures
| Online Contents | 2001
Activity of silica fume and dealuminated kaolin at different temperatures
| Tema Archiv | 2001
Activity of silica fume and dealuminated kaolin at different temperatures
| British Library Online Contents | 2001
Characterization and evaluation of the pozzolanic activity of Egyptian industrial by-products
| British Library Online Contents | 2001