تأثیر دی‌اکسید تیتانیوم و آلومین بر مقاومت فشاری و سایشی بتن خودتمیزشونده

شهریاری, لیلا; عسکری, مجتبی; سپاسی, مریم

doi:10.22065/jsce.2025.512704.3682

تأثیر دی‌اکسید تیتانیوم و آلومین بر مقاومت فشاری و سایشی بتن خودتمیزشونده

نوع مقاله : علمی - پژوهشی

نویسندگان

لیلا شهریاری ¹

مجتبی عسکری ²

مریم سپاسی ³

¹ استادیار، گروه مهندسی عمران، واحد شیراز، دانشگاه آزاد اسلامی ، شیراز، ایران

² مربی، گروه مهندسی عمران، واحد فیروزآباد، دانشگاه آزاد اسلامی، فیروزآباد، ایران

³ استادیار، گروه ریاضی، واحد شیراز، دانشگاه آزاد اسلامی ، شیراز، ایران

10.22065/jsce.2025.512704.3682

چکیده

رشد چشمگیر شهرنشینی و افزایش آلاینده‌های زیست‌محیطی ناشی از فعالیت‌های صنعتی و شهری، نیاز به مصالح نوین برای کاهش این آلودگی‌ها را بیش از پیش آشکار کرده است. بتن خودتمیزشونده یکی از نوآوری‌های مهم در صنعت بتن محسوب می‌شود که قابلیت کاهش آلاینده‌ها و حفظ زیبایی محیط شهری را دارد. این نوع بتن به واسطه ویژگی فوتوکاتالیستی خود، توان بالایی در تجزیه و کاهش آلاینده‌های موجود در محیط دارد. اما یکی از چالش‌های استفاده از بتن خودتمیزشونده، ضعف مقاومت سایشی است. این تحقیق با هدف بررسی تأثیر افزودن (TiO₂) و (Al₂O₃) بر خواص مکانیکی، دوام سایشی و قابلیت خودتمیزشوندگی بتن انجام شده است. به‌منظور دستیابی همزمان به خواص مکانیکی مناسب، جنبه‌های اقتصادی و قابلیت خودتمیزشوندگی، این مطالعه بر استفاده از مواد افزودنی در اندازه ماکرو تمرکز داشته است. بدین منظور از AL2O3 به میزان 3% وزنی سیمان و از TiO2 به میزان 5%، 10%، 15% و 20% وزنی سیمان استفاده شد. برنامه آزمایشی این تحقیق شامل اسلامپ، مقاومت فشاری در سنین مختلف، مقاومت سایشی و خاصیت فوتوکاتالیستی طرح‌های مختلف می‌شود. نتایج این تحقیق نشان داد که طرح مخلوط حاوی 3% وزنی Al₂O₃ و 15% وزنی TiO₂ عملکرد مکانیکی مطلوبی داشته و بهینه‌ترین خاصیت خودتمیزشوندگی ممکن را ارائه می‌دهد. همچنین، مقاومت سایشی طرح مخلوط حاوی 3% وزنی Al₂O₃ و 15% وزنی TiO₂ نسبت به طرح کنترل 45% افزایش یافت.

کلیدواژه‌ها

بتن خودتمیزشونده

TiO2

AL2O3

فوتوکاتالیستی

مقاومت سایشی

موضوعات

نقش مصالح در افزایش دوام و مقاومت سازه ها

عنوان مقاله English

The Effect of TiO₂ and Al₂O₃ on the Compressive Strength and Abrasion Resistance of Self-Cleaning Concrete

نویسندگان English

leila shahryari ¹

mojtaba askari ²

maryam sepasi ³

¹ Assistant Professor, Department of Civil Engineering, Shi.C.,Islamic Azad University,Shiraz,Iran

² Instructor, Department of Civil Engineering, Firozabad Branch, Islamic Azad University, Firozabad, Iran

³ Assistant Professor, Department of Mathematics,Shi.C.,Islamic Azad University,Shiraz,Iran

چکیده English

The significant growth of urbanization and the increase in environmental pollutants resulting from industrial and urban activities have made the need for modern materials to mitigate these pollutions more apparent than ever. Self-cleaning concrete is considered one of the major innovations in the concrete industry, offering the ability to reduce pollutants and preserve the aesthetic quality of urban environments. Due to its photocatalytic properties, this type of concrete has a high capability to decompose and reduce the pollutants present in the environment. However, one of the main challenges in using self-cleaning concrete is its weakness in abrasion resistance. This research aims to investigate the effect of adding titanium dioxide (TiO₂) and aluminum oxide (Al₂O₃) on the mechanical properties, abrasion durability, and self-cleaning capability of concrete. In order to achieve optimal mechanical properties, economic considerations, and self-cleaning functionality simultaneously, this study focuses on the use of additives in macro-scale sizes. For this purpose, aluminum oxide at 3% by cement weight and titanium dioxide at 5%, 10%, 15%, and 20% by cement weight were used. The experimental program includes slump, compressive strength at various ages, abrasion resistance, and the photocatalytic property for different concrete mixes. The results of this study showed that the RAM-15% mix design demonstrated desirable mechanical performance and provided the most optimal self-cleaning property. Additionally, the abrasion resistance in the RAM-20% mix increased by 45% compared to the control mix.

کلیدواژه‌ها English

Self-Cleaning Concrete

TiO₂

Al₂O₃

Photocatalytic

Abrasion Resistance

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