Volume 18, Issue 4 (Winter 2024)
2024, 18(4): 609-625 |
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Fathollahy M, Rahimi Menbar H. Investigation of Carbonate Aggregates and the Use of Petrography in Predicting Alkali-Aggregate Reaction (AAR). Journal of Engineering Geology 2024; 18 (4) :609-625
URL: http://jeg.khu.ac.ir/article-1-3143-en.html
URL: http://jeg.khu.ac.ir/article-1-3143-en.html
1- university of Kurdistan , m.fathollahy@uok.ac.ir
2- Tarbiat modares University
2- Tarbiat modares University
Abstract: (309 Views)
In order to produce strong and durable concrete, it is essential to accurately assess the alkali reactivity potential of aggregates. Alkali reactions occur gradually over time and are therefore often overlooked in the early stages of a project.. This research investigates the alkali-aggregate reaction (AAR) potential of concrete aggregates. Petrographic analysis of aggregates, based on ASTM C295, is a simple and rapid method for identifyingminerals that may react with the alkalis in cement. In this study, susceptible aggregates were identified through petrography, and then the accuracy of the results and the importance of petrographic analysis were verified using laboratory methods (ASTM C586 and ASTM C1260) to select suitable materials with minimal cost and time before designing the concrete mix. The results indicate that carbonate aggregates may contain silica and have alkali reactivity potential, necessitating the use of ASR testing methods as well. In addition, the results demonstrate that petrographic analysis is an effective and valuable method for identifying minerals with alkali reactivity potential.
Keywords: Carbonate aggregate including silica, Aggregate Alkali Reactivity (AAR), Petrography according to ASTM C 295.
Type of Study: Original Research |
Subject:
En. Geology
Received: 2024/11/15 | Accepted: 2024/12/28 | Published: 2024/12/30
Received: 2024/11/15 | Accepted: 2024/12/28 | Published: 2024/12/30
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