Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of Sodium Sulfate Activator on Compressive Strength and Hydration of Fly-Ash Cement Pastes
In the study, the effect of 4% sodium sulfate () as an activator on cement pastes with 0%, 20%, and 40% fly-ash replacements and a low water-to-cementitious materials ratio of 0.30 was investigated. The investigation was conducted to evaluate the effectiveness of the technique for the utilization of fly ash in developing sustainable concrete. The use of decreased setting times of the fresh pastes and increased compressive strength of the hardened pastes up to 28 days irrespective of fly-ash replacement. The use decreased content in the hardened pastes irrespective of fly-ash replacement. Meanwhile, it increased consumption by the pozzolanic reaction of fly ash and content of calcium silicate and aluminate hydrates in the hardened fly-ash–cement pastes. Consequently, the use of negatively affected cement hydration in the hardened cement pastes without fly ash, while it accelerated ettringite formation and pozzolanic reaction of fly ash in the hardened pastes.
Effect of Sodium Sulfate Activator on Compressive Strength and Hydration of Fly-Ash Cement Pastes
In the study, the effect of 4% sodium sulfate () as an activator on cement pastes with 0%, 20%, and 40% fly-ash replacements and a low water-to-cementitious materials ratio of 0.30 was investigated. The investigation was conducted to evaluate the effectiveness of the technique for the utilization of fly ash in developing sustainable concrete. The use of decreased setting times of the fresh pastes and increased compressive strength of the hardened pastes up to 28 days irrespective of fly-ash replacement. The use decreased content in the hardened pastes irrespective of fly-ash replacement. Meanwhile, it increased consumption by the pozzolanic reaction of fly ash and content of calcium silicate and aluminate hydrates in the hardened fly-ash–cement pastes. Consequently, the use of negatively affected cement hydration in the hardened cement pastes without fly ash, while it accelerated ettringite formation and pozzolanic reaction of fly ash in the hardened pastes.
Effect of Sodium Sulfate Activator on Compressive Strength and Hydration of Fly-Ash Cement Pastes
Bui, Phuong Trinh (Autor:in) / Ogawa, Yuko (Autor:in) / Kawai, Kenji (Autor:in)
19.03.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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