نوع مقاله : علمی - پژوهشی
نویسندگان
1 استادیار، دانشکده مهندسی، دانشگاه بوعلی سینا، همدان، ایران
2 دانشجوی کارشناسی ارشد، دانشکده مهندسی، دانشگاه بوعلی سینا، همدان، ایران
3 دانشیار، دانشکده مهندسی، دانشگاه بوعلی سینا، همدان، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
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.
کلیدواژه‌ها [English]
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