Strength and Durability Performance of Mortars Incorporating Calcined Clay as Pozzolan in Comparison with silica fume
سال انتشار: 1401
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 309
فایل این مقاله در 16 صفحه با فرمت PDF قابل دریافت می باشد
- صدور گواهی نمایه سازی
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_JCEMA-6-3_004
تاریخ نمایه سازی: 28 فروردین 1402
چکیده مقاله:
The use of low-grade calcined clays is the only potential material available in large quantities to meet the requirements of eco-efficient supplementary cementitious materials by decreasing the clinker content in blended types of cement or cement content in concrete. In the present paper, six mortar mixtures with a constant w/b ratio were used to investigate the mechanical and durability properties of mixtures substituted with low-grade calcined clays with/without limestone compared to PC and silica fume mixtures. The results obtained show that using calcined clays with low or intermediate purity (i.e., kaolinite content) leads to enhanced durability properties besides the comparable strength development characteristics compared to PC mortar. In this regard, the addition of ۳۰% calcined clay with/without limestone led to a marked decrease (about ۸۰ and ۴۰%) in chloride ion diffusion coefficient (Da) and an increase in surface chloride content (Cs) compared to the reference mixture. In addition, the utilization of calcined clay with a kaolinite content of ۵۶.۷% led to a reduction of ۵۲% in Da and an increase of ۱۴۰% in electrical resistivity compared to silica fume binder. The primary reason for the better performance is attributed to the refined pore structure and dense microstructure of the cement paste with the calcined clay pozzolan compared to PC and silica fume.
کلیدواژه ها:
نویسندگان
Ali Dousti
Assistant Professor of Road, Housing & Urban Development Research Center, Tehran, Iran.
Hadi Beyki
School of Civil Engineering, College of Engineering, University of Tehran, Tehran, Iran.
Mohammad Shekarchi
School of Civil Engineering, College of Engineering, University of Tehran, Tehran, Iran.
مراجع و منابع این مقاله:
لیست زیر مراجع و منابع استفاده شده در این مقاله را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود مقاله لینک شده اند :