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Alkali-Activated Slag Concrete After 5 Years of Alkali-Silica Reaction
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 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$CO_{2}$$\end{document} 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.
Alkali-Activated Slag Concrete After 5 Years of Alkali-Silica Reaction
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 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$CO_{2}$$\end{document} 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.
Alkali-Activated Slag Concrete After 5 Years of Alkali-Silica Reaction
RILEM Bookseries
Sanchez, Leandro F.M. (editor) / Trottier, Cassandra (editor) / Bromerchenkel, Lucas Herzog (author) / Najmabadi, Alireza Dehghan (author) / Peterson, Karl (author)
International Conference on Alkali-Aggregate Reaction in Concrete ; 2024 ; Ottawa, ON, Canada
Proceedings of the 17th International Conference on Alkali-Aggregate Reaction in Concrete ; Chapter: 67 ; 589-596
RILEM Bookseries ; 50
2024-05-06
8 pages
Article/Chapter (Book)
Electronic Resource
English
| British Library Online Contents | 1996
Alkali-Activated Slag Cement Concrete
| Online Contents | 2016