بررسی آزمایشگاهی و تحلیلی تاثیر الیاف فولادی در خصوصیات مکانیکی و کارایی بتن های خود تراکم الیافی

نوع مقاله : مقاله پژوهشی

نویسنده

استادیار، گروه مهندسی عمران، دانشگاه پیام نور، صندوق پستی 3697-19395، تهران، ایران

چکیده

بتن های خود تراکم با توجه به مزایای آن ها روز به روز در حال توسعه می باشند. در این بین بتن های توانمند نیز به دلیل ویژگی های مناسب مورد توجه محقین قرار گرفته اند. در این مقاله با استفاده از یک تحقیق آزمایشگاهی، مطالعه جامعی بر روی خصوصیات مکانیکی و کارایی بتن توانمند الیافی خود تراکم صورت گرفته است. در قالب این مقاله 9 طرح اختلاط ساخته شد. آزمایش های مقاومت فشاری، کششی، خمشی در بخش خصوصیات مکانیکی بر روی نمونه ها انجام شد. در بخش کارایی، آزمایش حلقه J انجام شد و همچنین آزمایش تعیین سرعت امواج آلتراسونیک به منظور بررسی کیفیت ساخت نمونه ها انجام شد. مطابق با نتایج به دست آمده تاثیر الیاف بر مقاومت کششی و خمشی به مراتب بیشتر از مقاومت فشاری بود. از طرفی افزودن الیاف تاثیرات منفی بر روی کارایی و سرعت امواج داشت. در نهایت نیز روابطی به منظور محاسبه مقاومت کششی و خمشی نمونه ها بر حسب مقاومت فشاری ارائه شد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Experimental and Analytical Investigation on The Effect of Steel Fibers on The Mechanical Properties and Performance of Fibrous Self-Compacting Concretes

نویسنده [English]

  • Ali Ghorbani
Assistant Professor, Department of Engineering, Payame Noor University, Tehran, Iran
چکیده [English]

Using self-compacting concrete is being developed due to its advantages. Also, the high-performance concrete has attracted a lot of researcher attention because of its special characteristics. In this research, a comprehensive experimental investigation is performed on the mechanical and flowability of high-performance self-compacting concrete. In this article, nine mix compositions were cast and tested. In mechanical properties part, the compressive strength test, splitting tensile strength and flexural strength test were done on the specimens. In the durability and flowability part, J-Ring and ultra-sonic pulse velocity (UPV) tests were conducted on the specimens. According to the results, the effects of fiber on tensile and flexural strength was significantly more than the compressive strength. On the other hand, the addition of fibers had negative effects on the workability and UPV results. Finally, to calculate the tensile and flexural strength of specimens versus compressive strength, the relationships were proposed.

کلیدواژه‌ها [English]

  • Compressive strength
  • tensile strength
  • Self-Compacting Concrete
  • Flowability

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  • تاریخ دریافت: 08 دی 1400
  • تاریخ بازنگری: 15 اسفند 1400
  • تاریخ پذیرش: 15 اسفند 1400
  • تاریخ اولین انتشار: 15 اسفند 1400