بررسی تأثیر دی‌اکسید تیتانیوم بر خاصیت خودتمیزشوندگی و دوام بتن در برابر نفوذ یون کلراید به روش RCMT

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه مهندسی عمران، واحد ارومیه، دانشگاه آزاد اسلامی، ارومیه، ایران

2 دانشیار، گروه مهندسی عمران، واحد ارومیه، دانشگاه آزاد اسلامی، ارومیه، ایران

3 استادیار، گروه مهندسی عمران، واحد ارومیه، دانشگاه آزاد اسلامی، ارومیه، ایران

10.22124/jcr.2026.31134.1710

چکیده

در سال‌های اخیر، بتن‌های خودتمیزشونده به دلیل ظرفیت بالای آن‌ها در کاهش آلودگی‌های محیطی و کاهش هزینه‌های نگهداری، جایگاه ویژه‌ای یافته‌اند. این بتن با استفاده از پوشش‌های فوتوکاتالیستی توسط دی‌اکسید تیتانیوم (TiO₂)، امکان حذف آلاینده‌ها را فراهم آورده و باعث حفظ زیبایی و پاکیزگی نماهای شهری را فراهم می‌کنند. با این وجود، دوام و پایداری بتن‌های خودتمیزشونده در برابر نفوذ یون کلراید، به‌ویژه در محیط‌های خورنده، یک ابهام در کاربرد گسترده آن‌ها به شمار می‌آید. این تحقیق با هدف بررسی تأثیر TiO₂ بر بهبود دوام بتن در برابر نفوذ یون کلراید و خاصیت خودتمیزشوندگی انجام شده است. بدین ترتیب پنج طرح مخلوط با دی‌اکسید تیتانیوم با درصدهای مختلف 0، 5، 10، 15 و 20% وزنی سیمان ساخته شد و با روش RCMT طیق مبحث نهم مقررات ملی ساختمان ارزیابی شدند. نتایج نشان داد که افزودن TiO₂ تا 20% موجب کاهش 80% نفوذ یون کلراید نسبت به نمونه شاهد می‌شود. همچنین، خاصیت خودتمیزشوندگی در نمونه‌های با 15و 20% افزودنی به شکل مؤثری بهبود یافت. این تحقیق نشان می‌دهد که استفاده از دی‌اکسید تیتانیوم در بتن، علاوه بر افزایش دوام در محیط‌های خورنده، امکان ساخت بتن‌های خودتمیزشونده با کاربرد در محوطه و سازه‌های شهری را فراهم می‌کند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

“Investigation of the Effect of Titanium Dioxide on the Self-Cleaning Property and Durability of Concrete Against Chloride Ion Penetration Using the RCMT Method”

نویسندگان [English]

  • Mohammad Javad Zare Ghanat Novi 1
  • Ashkan KhodaBandehLou 2
  • peyman hamidi 3
  • Keyvan farzad 3
1 Ph.D. Student, Department of Civil Engineering, Ur.C., Islamic Azad University, Urmia, Iran
2 Associate Professor, Department of Civil Engineering, Urmia Branch, Islamic Azad University, Urmia, Iran
3 Assistant Professor, Department of Civil Engineering, Ur.C., Islamic Azad University, Urmia, Iran
چکیده [English]

In recent years, self-cleaning concretes have gained significant importance due to their high capacity for reducing environmental pollution and maintenance costs. These concretes, employing photocatalytic coatings with titanium dioxide (TiO₂), facilitate the removal of pollutants and help maintain the beauty and cleanliness of urban facades. However, the durability and sustainability of self-cleaning concretes against chloride ion penetration, particularly in corrosive environments, remain ambiguous concerning their widespread application. This study aims to investigate the effect of TiO₂ on enhancing concrete durability against chloride ion penetration and its self-cleaning properties. For this purpose, five concrete mix designs with titanium dioxide at varying percentages of 0, 5, 10, 15, and 20% by cement weight were prepared and evaluated using the RCMT method in accordance with Section 9 of the National Building Regulations. The results demonstrated that adding up to 20% TiO₂ resulted in an 80% reduction in chloride ion penetration compared to the control sample. Furthermore, the self-cleaning properties were significantly improved in samples with 15% and 20% additive. This research indicates that utilizing titanium dioxide in concrete not only enhances durability in corrosive environments but also enables the production of self-cleaning concretes suitable for use in urban pavements and structures.

کلیدواژه‌ها [English]

  • self-cleaning concrete
  • titanium dioxide
  • chloride ion
  • RCMT test
  • photocatalytic property
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