کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
257262 503584 2014 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Compressive behavior of steel fiber reinforced recycled aggregate concrete after exposure to elevated temperatures
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Compressive behavior of steel fiber reinforced recycled aggregate concrete after exposure to elevated temperatures
چکیده انگلیسی


• Recycled aggregate concrete (RAC) tested after exposure to high temperatures.
• High temperature has detrimental effect on strength, elastic modulus and toughness.
• Steel fibers effectively restrict cracking of RAC subjected to high temperature.
• Steel fibers increase toughness of RAC after high temperature exposure.
• High temperature causes higher strength and mass loss of RAC than normal concrete.

For sustainability considerations, the use of recycled aggregate in concrete has attracted many interests in the research community. One of the main concerns for using such concrete in buildings is its spalling in fire. This may be alleviated by adding steel fibers to form steel fiber reinforced recycled aggregate concrete (SFRAC). This paper presents an experimental investigation into the compressive properties of SFRAC cylinders after exposure to elevated temperatures, including the compressive strength, Young’s modulus (stiffness), stress–strain curve and energy absorption capacity (toughness). The effects of two parameters, namely steel fiber volume content (0%, 0.5%, 1%, 1.5%) and temperature (room temperature, 200 °C, 400 °C and 600 °C) on the compressive mechanical properties of concrete were investigated. The test results show that both compressive strength and stiffness of the concrete are significantly reduced after exposure to high temperatures. The addition of steel fibers is helpful in preventing spalling, and significantly improves the ductility and the cracking behavior of recycled aggregate concrete (RAC) after exposure to high temperatures, which is favorable for the application of RAC in building construction.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 71, 30 November 2014, Pages 1–15
نویسندگان
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