The Effect of Alkali-Silica Reaction (ASR) on the Mechanical Properties of Concretes Containing Trass

Articles in Press

Document Type : Original Article

Authors

1 Assistant Professor, Faculty of Engineering, Bu Ali Sina University, Hamedan, Iran

2 Master’s student, Faculty of Engineering, Bu Ali Sina University, Hamedan, Iran

3 Associate Professor, Faculty of Engineering, Bu Ali Sina University, Hamedan, Iran

10.22065/jsce.2024.416590.3220

Abstract

The Alkali-silica reaction (ASR) is one of the most significant concerns in the concrete life cycle. It reduces the serviceability and increases the expense of maintaining structures. In addition, the occurrence of ASR impacts the internal structure of concrete and decreases its integrity. Thus, the mechanical properties of concrete can be significantly affected by ASR. Different researchers have mentioned this issue, and most of the results have proved the reduction of the mechanical properties of concrete due to ASR. In this study, in addition to examining the length changes of mortar and concrete samples, the effect of ASR on three main mechanical properties of concrete (compressive strength, bending strength and tensile strength) was also investigated. In order to evaluate the aforementioned parameters, mixtures with and without Trass containing aggregates with varying degrees of reactivity were prepared and cured under various conditions. The results showed all studied properties decreased under ASR conditions (accelerated ASTM C1293 at 60 ºC). However, this reduction depended on the reactivity degree of the used aggregates. Furthermore, using the Trass as a partial replacement for cement could reduce ASR's destructive effects. In addition, a significant relationship can be established between the results of the length changes and the changes of the studied mechanical characteristics.

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Main Subjects

Journal of Structural and Construction Engineering

Articles in Press, Accepted Manuscript
Available Online from 20 February 2024

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History

  • Receive Date: 02 October 2023
  • Revise Date: 26 December 2023
  • Accept Date: 20 February 2024

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