اعتبار،چابکی،پاسخگویی

بررسی ویژگی‌های مکانیکی بتن شفاف خودمتراکم با افزودن دوده سیلیس

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی عمران، دانشکده مهندسی، دانشگاه فردوسی مشهد، مشهد، ایران

2 دپارتمان عمران، دانشگاه بابل نوشیروانی، بابل، ایران

3 دانشگاه خیام مشهد

چکیده
بتن عبور دهنده نور (لیتراکن) نوعی بتن است که از فیبرهای نوری برای انتقال نور استفاده می‌کند و در درجه اول به عنوان یک عنصر زیبایی‌شناختی در معماری عمل می‌کند و در عین حال مصرف انرژی را کاهش داده و راندمان را افزایش می‌دهد. این تحقیق، برای اولین بار، خواص بتن عبور دهنده نور خودتراکم (SCLTC) را بررسی کرده و سپس تأثیر افزودن دوده سیلیس به این مخلوط را بررسی می‌کند. این مطالعه به بررسی خواص مکانیکی بتن خودتراکم عبور دهنده نور (SCLTC) با ۴٪ الیاف نوری و مقادیر مختلف دوده سیلیس (SF) (۵٪، ۱۰٪ و ۱۵٪) پس از ۲۸ روز عمل آوری می‌پردازد. در حالی که بتن معمولی به دلیل واکنش‌پذیری پوزولانی و اصلاح ریزساختاری از SF بهره می‌برد، این تحقیق روند متضادی را در SCLTC نشان می‌دهد. نمونه کنترل (۰٪ SF) بالاترین مقاومت فشاری (۵۸.۳ مگاپاسکال) را نشان داد، در حالی که افزودن SF منجر به کاهش قابل توجه ۶۷.۸٪ در ۵٪ SF (۱۸.۸ مگاپاسکال)، ۳۹.۶٪ در ۱۰٪ SF (۳۵.۲ مگاپاسکال) و کاهش بیشتر در ۱۵٪ SF (۱۸.۹ مگاپاسکال) شد. مقدار بهینه SF به عنوان ۱۰٪ شناسایی شد که بازیابی محدود مقاومت را در برابر اثرات مضر دوزهای بالاتر، احتمالاً به دلیل اختلال در بسته‌بندی ذرات، افزایش تقاضای آب و اختلال در پیوند الیاف-ماتریس، متعادل می‌کند. میزان عبور نور در تمام مخلوط‌ها ثابت ماند (حدود ۵٪)، که نشان دهنده تأثیر ناچیز SF بر عملکرد نوری است. این یافته‌ها بر نیاز به طرح‌های اختلاط مناسب‌تر در SCLTC تأکید می‌کند. تحقیقات آینده باید دوزهای پایین‌تر SF (کمتر از ۵٪) و افزودنی‌های هم‌افزایی را برای افزایش عملکرد در عین حفظ خودتراکمی و شفافیت بررسی کنند. این مطالعه درک بتن چندمنظوره را ارتقا می‌دهد و کارایی رئولوژیکی را با کاربردهای معماری پایدار پیوند می‌دهد.

کلیدواژه‌ها

موضوعات

عنوان مقاله English

Investigating the mechanical characteristics of self-compacting light-transmitting concrete due to the addition of silica fume

نویسندگان English

Arash Rajaee 1
Mohammadsadra Yousefi 2
Amir Pasban 3
Morteza Sheikhi 3
1 Department of civil engineering, faculty of enginnering, Ferdowsi University of Mashhad
2 Department of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran
3 Department of Civil Engineering, Khayyam University of Mashhad, Mashhad, Iran
چکیده English

Light-transmitting concrete (Litracon) is a type of concrete that utilizes optical fibers to transmit light, serving primarily as an aesthetic element in architecture while also lowering energy consumption and enhancing efficiency. This research, for the first time, examines the properties of self-compacting light-transmitting concrete (SCLTC) and then examines the effect of adding silica fume to this mixture. This study investigates the mechanical properties of SCLTC incorporating 4% optical fibers and varying silica fume (SF) contents (5%, 10%, and 15%) after 28 days of curing. While conventional concrete benefits from SF due to its pozzolanic reactivity and microstructural refinement, this research reveals a contrasting trend in SCLTC. The control sample (0% SF) exhibited the highest compressive strength (58.3 MPa), whereas SF incorporation led to significant reductions of 67.8% at 5% SF (18.8 MPa), 39.6% at 10% SF (35.2 MPa), and a further decline at 15% SF (18.9 MPa). The optimal SF content was identified as 10%, balancing limited strength recovery against the detrimental effects of higher dosages, likely due to disrupted particle packing, increased water demand, and impaired fiber-matrix bonding. Light transmittance remained consistent (~5%) across all mixes, indicating SF’s negligible impact on optical performance. These findings highlight the need for more appropriate mix designs in SCLTC. Future research should explore lower SF dosages (<5%) and synergistic admixtures to enhance performance while preserving self-consolidation and translucency. This study advances the understanding of multifunctional concrete, bridging rheological efficiency with sustainable architectural applications.

کلیدواژه‌ها English

  • Self-compacting Concrete (SCC)
  • Light Transmitting Concrete (Litracon)
  • Compressive Strength
  • Silica Fume
  • Optical Fiber
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  • تاریخ دریافت 04 خرداد 1404
  • تاریخ بازنگری 06 تیر 1404
  • تاریخ پذیرش 08 تیر 1404
  • تاریخ اولین انتشار 08 تیر 1404
  • تاریخ انتشار 01 شهریور 1404