نوع مقاله : مقاله کامل پژوهشی
1 استادیار و عضو هیدت علمی دانشگاه تربیت دبیر شهید رجایی تهران
2 دانشجوی کارشناسی ارشد- دانشگاه تربیت دبیر شهید رجایی تهران
عنوان مقاله [English]
Currently, concrete based on Portland cement (PC) is the most used construction material. However, Portland cement is not without problems. Manufacturing of Portland cement consumes 10-11 EJ of energy annually, approximately 2-3% of global primary energy use. Furthermore, Portland cement production results in approximately 0.87 of carbon dioxide for every tons of cement produced (roy, 1999; Damtoft et al., 2008). Recent researches on construction industry show an increasing interest in partial replacement of cement by pozzolans and minerals. Production and use of these materials can be accompanied by economic, environmental and technical advantages such as saving energy, reducing heat of hydration, environmental protection or improvement of the durability against chemical attacks (Kargol et al., 2013; Madlool et al., 2013). Wollastonite is a natural mineral that has been recently proposed as an alternative part of cement in concrete (Ransinchung and Kumar, 2010). There is little information about the effect of this material on mechanical properties and durability of concrete. In this study the effect of different replacement percentages of wollastonite and silica fume with cement on concrete properties was evaluated.