Anzeige
Erschienen in:
2024 | OriginalPaper | Buchkapitel
Alkali-Activated Slag Concrete After 5 Years of Alkali-Silica Reaction
verfasst von : Lucas Herzog Bromerchenkel, Alireza Dehghan Najmabadi, Karl Peterson
Erschienen in: Proceedings of the 17th International Conference on Alkali-Aggregate Reaction in Concrete
Verlag: Springer Nature Switzerland
Aktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
Abstract
Cement is one of the most widely adopted building materials in the world, due to versatility, efficiency, and cost. Cement production, however, is a big contributor to \(CO_{2}\) emissions worldwide.
Alternatives are available, based on recycled building materials, industrial by-products, natural minerals, among others, but these are not always as cost-effective and durable as Portland Cement. The processes responsible for the long-term degradation of concrete, made from Portland Cement or otherwise, include corrosion, carbonation, binder-aggregate reactions, sulfate attack among others.
This work assesses the long-term durability of alkali-activated alternative binders, namely slag, as compared to regular Portland Cement in concrete under Alkali-silica reaction conditions.
Six mix designs were chosen for this study, two using Portland Cement as the binder, and four with slag as the alkali-activated precursor. Out of the four slag mix designs, two used slags from a Canadian source as the primary binders, and two used slag from an European source. Concrete samples were kept at 38 ℃ and 100% RH for 5 years. The performance was investigated by length measurements, microscopic investigations, and chemical analyses using SEM-EDS equipment.
It was found that ASR gel chemistry may change over time, both for OPC and Alkali-activated Slag concrete.