تأثیر نانوسیلیس، انواع الیاف و دیگر مواد افزودنی بر نفوذپذیری بتن غلتکی

نوع مقاله : مقاله پژوهشی

نویسنده

عضو هیات علمی- استاد دانشگاه محقق اردبیلی- گروه عمران

10.22124/jcr.2025.28717.1675

چکیده

این تحقیق به بررسی تأثیر افزودن نانوسیلیس، الیاف فولادی، شیشه ای، پلی‌پروپیلن، میکروسیلیس و سرباره بر رفتار مکانیکی و دوام بتن غلتکی پرداخته است. نمونه‌ها با نسبت‌های مختلف نانوذرات و انواع الیاف ساخته شده و تأثیرات آن‌ها بر نفوذپذیری و مقاوت فشاری بتن مورد ارزیابی قرار گرفت. نتایج نشان داد که نانوسیلیس با بهبود میکروساختار و کاهش کریستال‌های هیدروکسید کلسیم، نفوذپذیری بتن را کاهش می‌دهد. همچنین، الیاف با کاهش ترک‌ها و قطع پیوستگی حفرات، نفوذپذیری بتن را بهبود می‌بخشند. ترکیب این افزودنی‌ها منجر به بهبود چشمگیر در خواص مکانیکی و دوام بتن غلتکی شده و می‌تواند در طراحی مخلوط‌های بهینه‌تر بتن کاربرد داشته باشد. نتایج این تحقیق بر تأثیر مثبت نانوذرات و انواع الیاف در افزایش عمر مفید و عملکرد بتن تأکید می‌کند. در بررسی مخلوط‌‌‌های تک جزئی حاوی نانوسیلیس و الیاف می‌‌بینیم که عملکرد بتن در مقابل نفوذپذیری با ترکیب این مواد بهتر از حالت تک جزئی عمل می‌‌کند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

The effect of nanosilica, types of fibers and other additives on the permeability of rolled compacted concrete

نویسنده [English]

  • Yaghoub Mohammadi
Professor, Civil Engineering Department, University of Mohaghegh Ardabil
چکیده [English]

This research has investigated the effect of adding nano-silica, steel, glass, polypropylene, micro-silica and Blast iron slag on the mechanical behavior and durability of rolled compacted concrete. The samples were made with different ratios of nanoparticles, types of fibers and their effects on permeability and compressive strength of concrete were evaluated. The results showed that nanosilica reduces the permeability of concrete by improving the microstructure and reducing calcium hydroxide crystals. Also, fibers improve the permeability of concrete by reducing cracks and breaking the continuity of pore. The combination of these additives leads to a significant improvement in the mechanical properties and durability of rolled concrete and can be used in the design of more optimal concrete mixes. The results of this research emphasize the positive effect of nanoparticles and types of fibers in increasing the useful life and performance of concrete. In the investigation of single-component mixtures containing nanosilica and fibers, we see that the performance of concrete against permeability with the combination of these materials works better than the single-component state.

کلیدواژه‌ها [English]

  • Roller compacted concrete
  • permeability
  • nanosilica
  • additives
  • types of fibers
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