Nano-silica (SiO2) contribution to mechanical and microstructural characteristics of high performance concrete pavement
المؤلفون المشاركون
al-Khafaji, Fatimah Fahim
Ahmad, Nahlah Yasub
المصدر
Journal of Engineering and Sustainable Development
العدد
المجلد 24، العدد 4 (31 يوليو/تموز 2020)، ص ص. 71-78، 8ص.
الناشر
الجامعة المستنصرية كلية الهندسة
تاريخ النشر
2020-07-31
دولة النشر
العراق
عدد الصفحات
8
التخصصات الرئيسية
الموضوعات
- مواد البناء
- الخرسانة
- المجاهر الإلكترونية
- الخواص الميكانيكية
- السليكا
- المواد النانوية
- المجاهر الإلكترونية الماسحة
- مطيافية الأشعة السينية
- اختبار الضغط
- القوة العاطفية
الملخص EN
High performance concrete pavement appears to be the best choice for layer with high strength and low cost.
In this paper, the mechanical properties were investigated which considered essential for design and requirements of rigid highway pavement.
These properties were examined by compressive strength, flexural strength and modulus of elasticity.
Previous test investigations were imposed for concrete mixes with different Nano SiO2 (size of 30 nm) percentage (0, 0.5, 1, 1.5, & 2) % by wright of cement as mineral admixture.
Also, X- Ray Diffraction (XRD) and X-Ray Fluorescence (XRF) tests were conducted to indicate the chemical composition of the used admixture.
Energy Dispersive Spectroscopy (EDS) was conducted to visualize the micro structural behaviour of concrete during hydration process.
Wet and dry mixing methods were utilised to prepare the modified concrete mixes and the results of the more effective method, were adopted.
Scanning electron microscopy (SEM) was utilized to investigate the microstructure and morphology of nano concrete mixes.
The results of SEM indicated that the microstructural distribution of C-S-H gel were comparable for all the nano mixes.
The decrease in thickness of nano concrete layer was associated with the increment in the percentage of nano silica add to the mixes when the other factors remain the same.
The best percentage of nano silica was 1.5% by weight of cementitious materials (by using dry mixing method).
This percentage satisfied all requirements of fresh and hardened concrete mixes for highway pavement and achieved well microstructure with significant decrement in the thickness of concrete layer which positively reflected on construction cost.
High performance concrete pavement appears to be the best choice for layer with high strength and low cost.
In this paper, the mechanical properties were investigated which considered essential for design and requirements of rigid highway pavement.
These properties were examined by compressive strength, flexural strength and modulus of elasticity.
Previous test investigations were imposed for concrete mixes with different Nano SiO2 (size of 30 nm) percentage (0, 0.5, 1, 1.5, & 2) % by wright of cement as mineral admixture.
Also, X- Ray Diffraction (XRD) and X-Ray Fluorescence (XRF) tests were conducted to indicate the chemical composition of the used admixture.
Energy Dispersive Spectroscopy (EDS) was conducted to visualize the micro structural behaviour of concrete during hydration process.
Wet and dry mixing methods were utilised to prepare the modified concrete mixes and the results of the more effective method, were adopted.
Scanning electron microscopy (SEM) was utilized to investigate the microstructure and morphology of nano concrete mixes.
The results of SEM indicated that the microstructural distribution of C-S-H gel were comparable for all the nano mixes.
The decrease in thickness of nano concrete layer was associated with the increment in the percentage of nano silica add to the mixes when the other factors remain the same.
The best percentage of nano silica was 1.5% by weight of cementitious materials (by using dry mixing method).
This percentage satisfied all requirements of fresh and hardened concrete mixes for highway pavement and achieved well microstructure with significant decrement in the thickness of concrete layer which positively reflected on construction cost.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Ahmad, Nahlah Yasub& al-Khafaji, Fatimah Fahim. 2020. Nano-silica (SiO2) contribution to mechanical and microstructural characteristics of high performance concrete pavement. Journal of Engineering and Sustainable Development،Vol. 24, no. 4, pp.71-78.
https://search.emarefa.net/detail/BIM-1263668
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Ahmad, Nahlah Yasub& al-Khafaji, Fatimah Fahim. Nano-silica (SiO2) contribution to mechanical and microstructural characteristics of high performance concrete pavement. Journal of Engineering and Sustainable Development Vol. 24, no. 4 (Jul. 2020), pp.71-78.
https://search.emarefa.net/detail/BIM-1263668
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Ahmad, Nahlah Yasub& al-Khafaji, Fatimah Fahim. Nano-silica (SiO2) contribution to mechanical and microstructural characteristics of high performance concrete pavement. Journal of Engineering and Sustainable Development. 2020. Vol. 24, no. 4, pp.71-78.
https://search.emarefa.net/detail/BIM-1263668
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
-
رقم السجل
BIM-1263668
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر