نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشگاه گیلان، رشت، ایران
2 عضو هیات علمی دانشگاه گیلان
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In this research, the effect of high temperature on the behavior of heavyweight geopolymer concrete plates containing Electric Arc Furnace (EAF) aggregates and reinforced with hybrid aramid and steel fibers under impact loading has been investigated. The volumetric percentage of steel fibers varied between 0.25% and 1%, while aramid fibers were used at 0.25% and 0.5%. Eight mix designs were prepared, using EAF slag as heavy aggregates and a combination of blast furnace slag and microsilica as the base material for geopolymer concrete. The compressive strength of the samples was measured at 28 days of age. Additionally, impact tests (drop-weight test) were conducted on concrete plates with dimensions of 400 × 400 × 40 mm, and parameters such as impulse for compression (Pc), impulse for restitution (Pr), total impulse (Pf), effective impact force, and impact energy were calculated. The results showed that the addition of both steel and aramid fibers to heavyweight geopolymer concrete reduces the reduction in compressive strength due to heat. However, steel fibers had a more significant effect in mitigating this loss. Under the effect of 600°C, samples containing 1% steel fibers exhibited the least loss of compressive strength. In the impact test, steel fibers significantly increased the compressive impulse and rebound impulse, with the highest values of these parameters obtained from the mix design containing 1% steel fibers. Furthermore, steel fibers had a greater impact on increasing the effective impact force compared to aramid fibers.
کلیدواژهها [English]
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