کامپوزیت های مبتنی بر سیمان
ترجمه نشده

کامپوزیت های مبتنی بر سیمان

عنوان فارسی 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
مجله/کنفرانس: مصالح ساختمانی و ساخت و ساز – Construction and Building Materials
رشته های تحصیلی مرتبط: مهندسی پلیمر، مهندسی عمران
گرایش های تحصیلی مرتبط: مهندسی مواد مرکب، نانو فناوری، سازه
کلمات کلیدی فارسی: 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
نوع نگارش مقاله: مقاله پژوهشی (Research Article)
نمایه: Scopus – Master Journals List – JCR
شناسه دیجیتال (DOI): https://doi.org/10.1016/j.conbuildmat.2019.05.175
دانشگاه: Rao Research and Consulting, LLC, McLean, VA, United States
ناشر: الزویر - Elsevier
نوع ارائه مقاله: ژورنال
نوع مقاله: ISI
سال انتشار مقاله: 2019
ایمپکت فاکتور: 4.686 در سال 2018
شاخص H_index: 129 در سال 2019
شاخص SJR: 1.522 در سال 2018
شناسه ISSN: 0950-0618
شاخص Quartile (چارک): Q1 در سال 2018
فرمت مقاله انگلیسی: PDF
تعداد صفحات مقاله انگلیسی: 10
وضعیت ترجمه: ترجمه نشده است
قیمت مقاله انگلیسی: رایگان
آیا این مقاله بیس است: خیر
آیا این مقاله مدل مفهومی دارد: ندارد
آیا این مقاله پرسشنامه دارد: ندارد
آیا این مقاله متغیر دارد: ندارد
کد محصول: E12386
رفرنس: دارای رفرنس در داخل متن و انتهای مقاله
فهرست انگلیسی مطالب

Abstract


1-Introduction


2-Experimental procedures


3-Results and discussion


4-Conclusions


Declaration of Competing Interest


Acknowledgments


References

نمونه متن انگلیسی 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.

  • اشتراک گذاری در

دیدگاه خود را بنویسید:

تاکنون دیدگاهی برای این نوشته ارسال نشده است

کامپوزیت های مبتنی بر سیمان
نوشته های مرتبط
مقالات جدید
لوگوی رسانه های برخط

logo-samandehi

پیوندها