تحسين أداء الخلطات الإسفلتية عالية الجساءة باستخدام النانوكلي

محتوى المقالة الرئيسي

المهندس مدين العطار
الاستاذ الدكتور محمد اسماعيل

الملخص

تتناول هذه الدراسة تأثير إضافة مادة النانوكلي (NC) على الأداء الميكانيكي للخلطات الإسفلتية عالية الجساءة (EME). تم تقييم تأثير النانوكلي عند أربع نسب وزنية مختلفة من الاسفلت (0%، 2%، 4%، 6%) على ثبات مارشال، ومقاومة الشد غير المباشر (ITS)، ومعامل الرجوعية (Mr) عند درجات حرارة 5 °م، و25 °م، و40 °م. أظهرت النتائج تحسنًا ملحوظًا في جميع مؤشرات الأداء؛ إذ ازدادت قيمة ثبات مارشال بنسبة 20.7% عند إضافة 6% من النانوكلي، في حين انخفضت قيم التدفق بنسبة 18.2% عند نسب 4% و6% نتيجة لتحسين مقاومة التشوّه الدائم. كما أظهرت نتائج اختبار الشد غير المباشر زيادة بنسبة 16.5%، مما يشير إلى تحسّن في مقاومة الشد للخلطة. وأظهرت قيم معامل الرجوعية ارتفاعًا واضحًا في جميع درجات الحرارة المختبرة، حيث بلغت الزيادة 55% عند 5 °م، و66.7% عند 25 °م، و64.6% عند 40 °م. وأثبتت المادة قدرة محسّنة على الاسترجاع المرن ضمن الظروف الحرارية المختلفة. كما حققت الخلطة التي تحتوي على 6% من النانوكلي قيمة معامل الثراء (K) تجاوزت 3.4، وهو ما يتوافق مع متطلبات تصنيف EME2. تؤكد نتائج هذه الدراسة أن النانوكلي يُعد معدِّلًا فعالًا يُحسّن الخصائص الميكانيكية والبنيوية لخلطات EME.

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تفاصيل المقالة

القسم

Articles

السيرة الشخصية للمؤلف

الاستاذ الدكتور محمد اسماعيل ، قسم الهندسة المدنية / كلية الهندسة / جامعة بغداد

استاذ دكتور / قسم الهندسة المدنية / كلية الهندسة / جامعة بغداد

كيفية الاقتباس

"تحسين أداء الخلطات الإسفلتية عالية الجساءة باستخدام النانوكلي" (2026) مجلة الهندسة, 32(3), ص 65–81. doi:10.31026/j.eng.2026.03.05.

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