Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Sulfate Resistance of Portland and Slag Cement Concretes Exposed to Sodium Sulfate for 38 Years
In 1976, production of separately ground, pelletized blast-furnace slag started near Hamilton, ON, Canada, and a research program began in 1977 to study the effects of this slag cement on sulfate resistance of concrete. For this purpose, concrete cylinders were cast from eight batches using normal, moderate sulfateresistant and highly sulfate-resistant portland cement types as well as mixtures of high-C3A portland cement plus slag at a watercementitious materials ratio (w/cm) of 0.45 or 0.50. In the present study, samples were cut from concrete cylinders after 38 years of exposure to sodium sulfate solutions and thin sections were prepared for analysis using scanning electron microscopy. Microstructural details were investigated from the exposed surface to the center of each cylinder, and different phases were determined. Ettringite, thaumasite, gypsum, and layers of calcium carbonate were found to have formed in the samples. A 65% slag substitution of high-C3A portland cement was very effective in improving the performance of concrete exposed to sodium sulfate.
Sulfate Resistance of Portland and Slag Cement Concretes Exposed to Sodium Sulfate for 38 Years
In 1976, production of separately ground, pelletized blast-furnace slag started near Hamilton, ON, Canada, and a research program began in 1977 to study the effects of this slag cement on sulfate resistance of concrete. For this purpose, concrete cylinders were cast from eight batches using normal, moderate sulfateresistant and highly sulfate-resistant portland cement types as well as mixtures of high-C3A portland cement plus slag at a watercementitious materials ratio (w/cm) of 0.45 or 0.50. In the present study, samples were cut from concrete cylinders after 38 years of exposure to sodium sulfate solutions and thin sections were prepared for analysis using scanning electron microscopy. Microstructural details were investigated from the exposed surface to the center of each cylinder, and different phases were determined. Ettringite, thaumasite, gypsum, and layers of calcium carbonate were found to have formed in the samples. A 65% slag substitution of high-C3A portland cement was very effective in improving the performance of concrete exposed to sodium sulfate.
Sulfate Resistance of Portland and Slag Cement Concretes Exposed to Sodium Sulfate for 38 Years
Fatemeh Alapour (Autor:in) / R Douglas Hooton
ACI materials journal ; 114
2017
Aufsatz (Zeitschrift)
Englisch
Sodium Sulfate Resistance of Fast-Track Portland-Cement Concretes
| Online Contents | 2007
Sodium Sulfate Resistance of Fast-Track Portland-Cement Concretes
| British Library Online Contents | 2007
High sulfate-resistant slag portland cement
| Springer Verlag | 1974
High sulfate-resistant slag portland cement
| Online Contents | 1974
Sulfate resistance of Portland cements, concretes and mortars
| Engineering Index Backfile | 1952