ارزیابی عملکرد بتن الیافی هیبریدی مسلح به الیاف فولادی، بارچیپ و ماکروسنتتیک

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه جامع امام حسین(ع)

10.22124/jcr.2022.19139.1495

چکیده

در سال‌های اخیر، کاربرد الیاف مصنوعی به‌منظور بهبود خواص مکانیکی توسعه چشم‌گیری داشته است. استفاده از هر یک از انواع الیاف منجر به بهبود برخی خواص و ضعیف شدن سایر ویژگی‌ها شده است. بکارگیری همزمان چند نوع الیاف با نسبتهای طراحی شده می‌تواند خواص اشاره شده را بطور همزمان ارتقاء داده و از ضعف‌های احتمالی جلوگیری نماید. در این تحقیق تأثیر الیاف با درصدهای حجمی مختلف بر مقاومت فشاری، خمشی و کششی نمونه‌ها در سنین مختلف نسبت به نمونه شاهد سنجیده شده است. در این تحقیق با استفاده از ترکیب همزمان الیاف فولادی، بارچیپ و ماکروسنتتیک در نسبت‌های مختلف ترکیبی، عملکرد بتن مورد آزمایش قرار گرفته است. در این میان بتن‌های الیافی هیبرید بهترین عملکرد را در آزمون‌های کششی، فشاری، خمشی و جذب انرژی از خود نشان داده است. با توجه به نتایج آزمایشگاهی و استفاده از بازه وسیعی در نسبت‌های اختلاط الیاف، می‌توان نوع و نسبت بهینه اختلاط را در بتن الیافی هیبریدی توصیه نمود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Evaluating Mechanical Properties of hybrid fiber concrete reinforced

نویسندگان [English]

  • Reza Khodabakhshi
  • Amin Jafarniya
  • Mohammad Fayyaz
  • Saeed Mohammad
imam hossein university
چکیده [English]

In recent years, the use of synthetic fibers to improve mechanical properties and reduce the shrinkage of fresh and hardened concrete, increase energy absorption and impact resistance of concrete, and replace thermal reinforcement with fibers have greatly expanded. The use of various types of fiber has led to the improvement of some properties and the weakening of other properties. Simultaneous use of several types of fibers with designed ratios can enhance the mentioned properties simultaneously and prevent possible weaknesses. In this study, the effect of fibers with various volumetric percentages on compressive, flexural and tensile strength of the samples at different ages compared to the control sample has been measured. The simultaneous combination of steel, barchip and macro-synthetics fibers with different ratios, compressive performance, flexural and tensile performance of concrete has been tested. Among the constructed concretes, the best performance of reinforced concrete with steel fibers in different tensile, compressive, and bending strengths has shown that these fibers perform better than other constructed samples. In hybrid fiber concrete, the best performance in bending and compressive strength and tensile strength has been related to hybrid fiber concrete consisting of macrosynthetics fibers and steel fibers.

کلیدواژه‌ها [English]

  • Fiber concrete
  • Steel fibers
  • Barchip fibers
  • Synthetic fibers
  • Compressive

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