تأثير المواد المالئة على أداء أسطح الطرق الأسفلتية

المؤلفون

  • حسن عويدات سالم قسم الهندسة المدنية، كلية الهندسة، جامعة وادي الشاطئ، براك

DOI:

https://doi.org/10.51984/sucp.v4i3.4076

الكلمات المفتاحية:

الأسفلت، المواد المالئة، الخلطات، استقرار مارشال والتدفق، تشكل التخدد بالعجلات

الملخص

تُنتَج الخلطات البيتومينية الساخنة (الأسفلت) بخلط الركام، والمواد الناعمة (الحشو)، والرابط البيتوميني عند درجة حرارة عالية ومناسبة. تؤثر خصائص الركام، الذي يُشكّل الجزء الأكبر من الخليط، على متانة هذه الخلطات ومتانتها. كما ترتبط مقاومة شقوق الكلل وعمق التخدد في الخليط بنوع الركام، وبالتالي خصائص كسره، وتحديدًا شكله وحبيباته، وخشونة سطحه. تحت تأثير أحمال المرور، يحدث إجهاد في الطبقة السطحية. تُعد المادة المستخدمة في الرصف، وتقنية التنفيذ، وحجم الأحمال من اهم العوامل الرئيسية التي تؤثر على أداء طبقة الرصف. هناك العديد من العوامل الأخرى التي تؤثر على أداء الخليط الاسفلتي ، مثل نوع وكمية المادة الرابطة، ونوع وكمية الركام الناعم والخشن. إضافةً إلى ذلك، تؤثر درجة حرارة الخلط، ووقت الخلط، والعناية أثناء الخلط على متانة وأداء الخليط. في حال تجاهل أيٍّ من هذه العوامل أثناء الخلط، ستكون جودة المنتج المطلوب منخفضة. يمكن دراسة تأثير أيٍّ من هذه العوامل على أداء ومتانة الخليط البيتوميني. في هذه الدراسة، استُخدمت مادة الحشو، وهي مسحوق مادة الحجر الجيري المستخدمة في التصميم. ودرست المشاكل التي قد تحدث عند استخدام نسبة حشو في الخليط، ضمن حدود المواصفات، ضمن حدود المواصفات المسموح بها وخارجها. ويمكن زيادة عمر خدمة الأسفلت من خلال تحسين الخليط، ما يعني إطالة فترات الصيانة. تشير النتائج إلى أن معدل الحشو المنخفض يؤدي إلى تكوين الشقوق، في حين يؤدي معدل الحشو المرتفع إلى ظهور الأخاديد؛ وعلى العكس من ذلك، فإن معدل الحشو القياسي مفيد لجودة الطريق.

المراجع

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Al-Qaisi T.A., "The Effect of Mineral Filler on the Asphalt Paving Mixtures", M.Sc. Thesis, College of Engineering, University of Baghdad, 1981.

Sadoon O.E. , " The influence of Filler Type on Asphalt Mastic and Performance Properties of Asphalt Paving Materials" ,M.Sc Thesis, College of Engineering , University Anbar , 2010.

Harris B.M. and Stuart K.D., "Analysis of mineral fillers and mastics used in stone matrix asphalt" , J. Assoc. Asphalt Paving Technol. , 1995

V. Antunes, A.C. Freire, L. Quaresma, R. Micaelo, Influence of the geometrical and physical properties of filler in the filler–bitumen interaction, Construction & Building Materials 76(76) (2015) 322-329.

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Salem, H. A. (2024). Enhancing Asphalt Mixtures: The Role of Lime, Pozzolan, and Cement in Road Construction. Wadi AlShatti University Journal of Pure and Applied Science, 2(2), July-December 2024.

التنزيلات

منشور


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2025-10-22

كيفية الاقتباس

تأثير المواد المالئة على أداء أسطح الطرق الأسفلتية. (2025). وقائع مؤتمرات جامعة سبها, 4(3), 187-192. https://doi.org/10.51984/sucp.v4i3.4076

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