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Register a new userMechanical properties of steel fiber reinforced lightweight concrete
الخصائص الميكانيكية للبيتون الخفيف المسلح بالألياف الفولاذية
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يتناول هذا البحث دراسة الخصائص الميكانيكية للبيتون الخفيف المسلح بالألياف الفولاذية. و قد تم الحصول على البيتون الخفيف باستخدام حصويات السكوريا المتوفرة بكميات كبيرة في الجمهورية العربية السورية. صممت ثلاث خلطات بيتونية بنسب مختلفة من الألياف الفولاذية 0.75)% , 0.5,0) (على أساس حجمي). تم إجراء مجموعة من الاختبارات على عينات اسطوانية و موشورية مأخوذة من هذه الخلطات لتعيين الخصائص الميكانيكية للبيتون الناتج و المتمثلة بالمقاومة على الضغط، معامل المرونة، الشد بالانفلاق، و الشد بالانعطاف كما تم إيجاد سلوك البيتون (العلاقة إجهاد-تشوه) تحت تأثير الضغط. بيّنت النتائج ازدياد قيم مقاومة الضغط و مقاومة الشد بالانفلاق و مقاومة الانعطاف بنسب تصل لـ16.9% و 25.6% و 53.6% عند استخدام الألياف الفولاذية على الترتيب. كما أظهرت أهمية استخدام الألياف الفولاذية لتحسين أداء البيتون و تحويل سلوكه الهش إلى سلوك مطاوع.
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.
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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the possibility to do control on product's properties by make control on treatment
parameters .
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