Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High temperature resistance of self compacting alkali activated slag/portland cement composite using lightweight aggregate
Highlights Self compacting alkali activated slag/Portland cement composite using lightweight aggregates were designed. High temperature resistance of composites were investigated. The lowest compressive strength was observed when exposed to temperature of 800 °C. At 1000 °C, increases in compressive strength were observed.
Abstract The aim of this study was to fabricate self compacting alkali activated slag/Portland cement composite design by using of lightweight aggregate for high temperatures. Locally available pumice was used as lightweight aggregate. The four parameters considered in this study were: slag to cement ratio (GBFS:PC), water content, lightweight aggregate to normal aggregate ratio and alkali activator to binder ratio. After the tests carried out dependent on four parameters, six composite mixtures were determined for the high temperature experiment. For this purpose, the composite samples were exposed to temperatures of 200, 400, 600, 800 and 1000 °C and changes in compressive strength and ultrasonic pulse velocity were measured. The microstructural changes caused by the high temperatures were investigated by means of SEM and FTIR spectroscopy. Following the high temperature tests, compressive strength began to decrease with the temperature increasing. The minimum compressive strengths were observed at the temperature of 800 °C. At 1000 °C no further deterioration was observed in the compressive strength of the both PC-free and PC substituted composite mixtures. The temperatures at which the microcracks became more evident were 600 °C and 800 °C for the mixtures with 100% and 85% GBFS, respectively.
High temperature resistance of self compacting alkali activated slag/portland cement composite using lightweight aggregate
Highlights Self compacting alkali activated slag/Portland cement composite using lightweight aggregates were designed. High temperature resistance of composites were investigated. The lowest compressive strength was observed when exposed to temperature of 800 °C. At 1000 °C, increases in compressive strength were observed.
Abstract The aim of this study was to fabricate self compacting alkali activated slag/Portland cement composite design by using of lightweight aggregate for high temperatures. Locally available pumice was used as lightweight aggregate. The four parameters considered in this study were: slag to cement ratio (GBFS:PC), water content, lightweight aggregate to normal aggregate ratio and alkali activator to binder ratio. After the tests carried out dependent on four parameters, six composite mixtures were determined for the high temperature experiment. For this purpose, the composite samples were exposed to temperatures of 200, 400, 600, 800 and 1000 °C and changes in compressive strength and ultrasonic pulse velocity were measured. The microstructural changes caused by the high temperatures were investigated by means of SEM and FTIR spectroscopy. Following the high temperature tests, compressive strength began to decrease with the temperature increasing. The minimum compressive strengths were observed at the temperature of 800 °C. At 1000 °C no further deterioration was observed in the compressive strength of the both PC-free and PC substituted composite mixtures. The temperatures at which the microcracks became more evident were 600 °C and 800 °C for the mixtures with 100% and 85% GBFS, respectively.
High temperature resistance of self compacting alkali activated slag/portland cement composite using lightweight aggregate
Dener, Murat (Autor:in) / Karatas, Mehmet (Autor:in) / Mohabbi, Mehrzad (Autor:in)
04.04.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2018
Alkali-aggregate expansion corrected with Portland-slag cement
| Engineering Index Backfile | 1951
| British Library Online Contents | 2012