مقاله انگلیسی رایگان در مورد کامپوزیت های مبتنی بر سیمان – الزویر ۲۰۱۹
مشخصات مقاله | |
ترجمه عنوان مقاله | کامپوزیت های مبتنی بر سیمان با مقاومت بسیار بالا طراحی شده با نانو الیاف اکسید آلومینیوم |
عنوان انگلیسی مقاله | Ultra-high strength cement-based composites designed with aluminum oxide nano-fibers |
انتشار | مقاله سال ۲۰۱۹ |
تعداد صفحات مقاله انگلیسی | ۱۰ صفحه |
هزینه | دانلود مقاله انگلیسی رایگان میباشد. |
پایگاه داده | نشریه الزویر |
نوع نگارش مقاله |
مقاله پژوهشی (Research Article) |
مقاله بیس | این مقاله بیس نمیباشد |
نمایه (index) | Scopus – Master Journals List – JCR |
نوع مقاله | ISI |
فرمت مقاله انگلیسی | |
ایمپکت فاکتور(IF) |
۴٫۶۸۶ در سال ۲۰۱۸ |
شاخص H_index | ۱۲۹ در سال ۲۰۱۹ |
شاخص SJR | ۱٫۵۲۲ در سال ۲۰۱۸ |
شناسه ISSN | ۰۹۵۰-۰۶۱۸ |
شاخص Quartile (چارک) | Q1 در سال ۲۰۱۸ |
مدل مفهومی | ندارد |
پرسشنامه | ندارد |
متغیر | ندارد |
رفرنس | دارد |
رشته های مرتبط | مهندسی پلیمر، مهندسی عمران |
گرایش های مرتبط | مهندسی مواد مرکب، نانو فناوری، سازه |
نوع ارائه مقاله |
ژورنال |
مجله / کنفرانس | مصالح ساختمانی و ساخت و ساز – Construction and Building Materials |
دانشگاه | Rao Research and Consulting, LLC, McLean, VA, United States |
کلمات کلیدی | نانو آلومینیوم، نانو الیاف، مقاومت بسیار بالا، سیمان چاه نفت، متاکائولین، بخار سیلیکا |
کلمات کلیدی انگلیسی | Nano-alumina، Nanofibers، Ultra-high strength، Oil well cement، Metakaolin، Silica fume |
شناسه دیجیتال – doi |
https://doi.org/10.1016/j.conbuildmat.2019.05.175 |
کد محصول | E12386 |
وضعیت ترجمه مقاله | ترجمه آماده این مقاله موجود نمیباشد. میتوانید از طریق دکمه پایین سفارش دهید. |
دانلود رایگان مقاله | دانلود رایگان مقاله انگلیسی |
سفارش ترجمه این مقاله | سفارش ترجمه این مقاله |
فهرست مطالب مقاله: |
Abstract ۱٫ Introduction ۲٫ Experimental procedures ۳٫ Results and discussion ۴٫ Conclusions Declaration of Competing Interest Acknowledgments References |
بخشی از متن مقاله: |
Abstract
The use of nanomaterials has become a popular way to improve the performance of cement-based composites. At the same time, ultra-high strength concrete is becoming more widely used. These materials provide superior durability to infrastructure elements, reducing the need for maintenance or early replacement. The performance boost is achieved by producing a denser microstructure and, in the case when nanofibers are used, may reduce the initiation of cracks. Aluminum oxide nanomaterials have the potential to provide a significant increase in compressive strength of cement-based materials. Here, the effect of incorporation of aluminum oxide nanofibers in oil well cement based mortars and composites is reported. The design of ultra-high strength concrete often requires a precisely tuned aggregate gradation, the use of specific cement types and high quantities of silica fume and superplasticizers along with high temperature and curing under elevated pressure. It was demonstrated that the use of small quantities of aluminum oxide nanofibers in an oil well cement based mortar could provide a compressive strength approaching 200 MPa. These levels were achieved at a considerably lower dosage of silica fume. It is envisioned that the high strength matrix is formed due to the reinforcing of calcium silicate hydrate layers which are formed around the nanofibers. This research demonstrated that due to a ‘‘shish kebab” effect the addition of well-dispersed aluminum oxide nanofibers at a very small dosage of 0.25% (by mass of cement) could provide up to 30% increase in compressive strength of cementitious systems, helping to meet the benchmarks for ultra-high strength cement-based composites. Introduction Ultra-high strength cement-based composite (UHSCC) materials, including ultra-high-performance fiber reinforced concrete (UHPC), are becoming a popular solution in modern construction practice [1–۵]. These new composite materials tend to provide superior durability and allow thinner structural sections to be used. However, the use of ultra-fine fillers and high quantities of reactive silica materials results in a significant increase in cost compared to conventional concrete. If a cement-based material with similar properties was developed without the need for such high volumes of sub-micron sized and ultra-fine components, the difference in price with conventional concrete could be significantly reduced. The properties of cementitious matrices are often considered as one of the most important features contributing to the performance of the composite. These properties are of even greater importance when ultra-high strength cement-based materials are considered. |