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Mechanical properties of steel fiber reinforced lightweight concrete

الخصائص الميكانيكية للبيتون الخفيف المسلح بالألياف الفولاذية

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 Publication date 2016
and research's language is العربية
 Created by Shamra Editor




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Thepaper studies the mechanical properties ofsteel fibers reinforced lightweight concrete.This kind of concrete is produced by usingscoria aggregateswhich can be found abundantly in Syria. Thelightweight concrete mixeswere designed for three different percentage of steel fibers (0, 0.5, 0.75)%. Different tests were performed to determine mechanical properties of product concrete such as compressive strength, elasticity modulus, splitting tensile strengthand flexural strengthalso; the stress–strain diagram of produced lightweight concrete was established under compression. The results showedanincrease of the compressive, splitting tensile and flexural strengths reach up 16.9%, 25.6%, and 53.6% respectivelywhen the steel fibers were used. Also the results indicated the importance of using the steel fibers to improve the performance of concrete and change its brittle behavior to ductile behavior.


Artificial intelligence review:
Research summary
يتناول هذا البحث دراسة الخصائص الميكانيكية للبيتون الخفيف المسلح بالألياف الفولاذية، حيث تم استخدام حصويات السكوريا المتوفرة بكميات كبيرة في سوريا. تم تصميم ثلاث خلطات بيتونية بنسب مختلفة من الألياف الفولاذية (0%, 0.5%, 0.75%) وتم إجراء مجموعة من الاختبارات على عينات اسطوانية وموشورية لتحديد الخصائص الميكانيكية مثل مقاومة الضغط، معامل المرونة، الشد بالانفلاق، والشد بالانعطاف. أظهرت النتائج زيادة في مقاومة الضغط بنسبة تصل إلى 16.9%، وزيادة في مقاومة الشد بالانفلاق بنسبة 25.6%، وزيادة في مقاومة الانعطاف بنسبة 53.6% عند استخدام الألياف الفولاذية. كما بينت الدراسة أهمية استخدام الألياف الفولاذية لتحسين أداء البيتون وتحويل سلوكه الهش إلى سلوك مطاوع.
Critical review
دراسة نقدية: على الرغم من أن البحث يقدم نتائج مهمة حول تحسين الخصائص الميكانيكية للبيتون الخفيف باستخدام الألياف الفولاذية، إلا أنه يفتقر إلى دراسة تأثير العوامل البيئية مثل الرطوبة ودرجات الحرارة على أداء البيتون المسلح بالألياف. كما أن الدراسة تركز بشكل كبير على الخصائص الميكانيكية دون التطرق إلى الجوانب الاقتصادية والتطبيقية لاستخدام هذا النوع من البيتون في المشاريع الإنشائية. كان من الممكن أن تكون الدراسة أكثر شمولاً إذا تضمنت مقارنة بين أداء البيتون المسلح بالألياف الفولاذية وأنواع أخرى من الألياف مثل الألياف الزجاجية أو البوليمرية.
Questions related to the research
  1. ما هي المواد المستخدمة في تحضير الخلطات البيتونية في هذه الدراسة؟

    تم استخدام الإسمنت البورتلاندي العادي، ماء صالح للشرب، حصويات السكوريا، رمل نهري خشن، رمل ناعم، ملدن فائق الأداء، وألياف فولاذية بطول 50 مم.

  2. ما هي النسب الحجمية للألياف الفولاذية المستخدمة في الخلطات البيتونية؟

    تم استخدام نسب حجمية للألياف الفولاذية تبلغ 0%, 0.5%, و0.75%.

  3. ما هي الزيادة في مقاومة الضغط عند استخدام الألياف الفولاذية بنسبة 0.75%؟

    ازدادت مقاومة الضغط بنسبة 16.9% عند استخدام الألياف الفولاذية بنسبة 0.75%.

  4. كيف تؤثر الألياف الفولاذية على سلوك البيتون الخفيف؟

    تعمل الألياف الفولاذية على تحسين أداء البيتون وتحويل سلوكه الهش إلى سلوك مطاوع، مما يزيد من مقاومته للتشقق ويعزز تماسكه.


References used
ACI Committee 213R-03, "Guide for Structural Lightweight Aggregate Concrete",American Concrete Institute, 2003, 38
Libre, N, A; Shekarchi, M; Mahoutian, M; Soroushian, P. "Mechanical properties of hybrid fiber reinforced lightweight aggregate concrete made with natural pumice ",Construction and Building Materials, Vol. 25, 2011, 2458–2464
Duzgun, O,A; Gul, R; Aydin, A,C. "Effect of steel fibers on the mechanical properties of natural lightweight aggregate concrete " Materials Letters, Vol. 59, 2005, 3357 – 3363
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