بررسی برخی از خصوصیات دوام رویه‌های بتنی حاوی نانو مواد

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی عمران، دانشگاه صنعتی سهند، تبریز، ایران

2 استادیار دانشکده عمران دانشگاه صنعتی سهند

چکیده

بهبود مشخصات مکانیکی و دوام سازه‌های بتنی از جمله رویه‌های بتنی همواره مورد توجه محققین بوده است. در این راستا استفاده از ظرفیت نانو مواد نیازمند بررسی‌های بیشتری است. نفوذپذیری، مقاومت در برابر سایش و مقاومت فشاری رویه‌های بتنی در این مطالعه مورد بررسی قرار گرفته است. تاکنون، استفاده از انواع نانو مواد به روش­های مختلف، بهبود ویژگی­های مکانیکی و دوام بتن را در پی داشته ­است. در همین راستا در این تحقیق از پنج نوع نانو ماده به‌صورت اکسید فلزات سیلیسیوم، تیتانیوم، آلومینیوم و آهن با درصد­­های مختلف استفاده شده است که به‌صورت یکنواخت پخش و به مخلوط اضافه شده‌اند. برای کاهش هزینه­‌ی تمام شده و استفاده‌ی­ کمتر از نانو مواد، نمونه­ها در دو لایه ساخته شده­اند. به این صورت که از یک لایه بتن خودتراکم حاوی نانو مواد به ضخامت 1 سانتی­متر بر روی نمونه‌های بتنی معمولی که ضخامت آن بسته به آزمون­های مختلف متفاوت می­باشد، استفاده شده است. نتایج نشانگر بهبود مشخصه­های رویه بتنی حاوی نانو مواد در مقایسه با نمونه کنترل است. برای مثال، در نمونه‌های حاوی نانو تیتانیا به مقدار 3 درصد وزنی سیمان، مقاومت در برابر نفوذپذیری به میزان 84/6 درصد افزایش یافته است. همچنین مقاومت در برابر سایش برای نمونه‌ی­ حاوی 1 درصد نانو سیلیکا به مقدار 88/1 درصد و مقاومت فشاری نمونه­‌ی حاوی 3 درصد نانو سیلیکا به میزان 88 درصد افزایش یافته است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigation of Some Durability Properties of Concrete Pavements Containing Nanoparticles

نویسندگان [English]

  • Farzin Ghadim Tekmehdash 1
  • Alireza Mohammadjafari 2
  • Hasan Afshin 1
1 Faculty of Civil Engineering, Sahand University of Technology, Tabriz, Iran
2 Assistant Professor, Faculty of Civil Engineering, Sahand University of Technology, Tabriz, Iran
چکیده [English]

Mechanical and durability properties of concrete structures, including concrete pavements, have been a focus of attention. In this regard, the potential of nanomaterials needs to be discussed more. Water permeability, abrasion, and compressive strength are assessed in this study. So far, the incorporation of diverse types of nanomaterials with different methods has caused the enhancement of some mechanical and durability properties of concrete. In the present study, five types of nanoparticles as nanoSiO2, nanoTiO2, nanoAl2O3, nanoFe2O3, and nanoFe3O4 in different amounts were uniformly dispersed and added to the concrete. To reduce the cost and decrease the required nanomaterials, specimens were made in two layers. The surface layer of specimens was made from self-compacting concrete containing nanoparticles with 1 cm depth, which was placed over the bottom layer from conventional concrete with different depths depending on the tests. The test results indicated that the properties of concrete pavements containing nanoparticles are improved comparing to the control specimen. For instance, in specimens containing nanoTiO2 as much as 3% by the weight of cement, the water permeability improved by 84.6%. Furthermore, the abrasion resistance of specimens containing nanoSiO2 at an amount of 1% was enhanced by 88.1%, and the addition of 3% of nanoSiO2 raised compressive strength by 88%.

کلیدواژه‌ها [English]

  • Concrete pavements
  • Abrasion
  • Permeability
  • Compressive Strength
  • nanoparticles
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