مطالعه آزمایشگاهی نقش الیاف هیبریدی دو‌گانه کوپلیمری و نانو‌سیلیس بر مقاومت‌های فشاری، کششی و خمشی بتن ژئوپلیمری بر پایه متاکائولن

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد مهندسی عمران- سازه، گروه مهندسی عمران، سازه و ژئوتکنیک، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران

2 استادیار گروه مهندسی عمران، سازه و ژئوتکنیک، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران.

3 استادیار گروه مهندسی مواد، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران

4 استادیار گروه مهندسی عمران، سازه و ژئوتکنیک، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران

5 دانشجوی کارشناسی ارشد مهندسی عمران- زلزله، گروه مهندسی عمران، سازه و ژئوتکنیک، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران

چکیده

بتن ژئوپلیمری در سال‌های اخیر به عنوان یک جایگزین سبز برای بتن پرتلند مطرح شده است که می‌تواند از اثرات منفی زیست محیطی تولید سیمان پرتلند بکاهد. در این مقاله اثر الیاف هیبریدی دوگانه کوپلیمری ونانوسیلیس بر مقاومت‌های فشاری، کششی و خمشی بتن ژئوپلیمری بر پایه متاکائولن مورد مطالعه آزمایشگاهی قرار گرفت. ابتدا آزمایش‌های اولیه به منظور رسیدن به طرح اختلاط بهینه انجام شد سپس به منظور بررسی رفتار بتن ژئوپلیمری الیافی بر پایه متاکائولن الیاف در نسبت‌های مختلف و همراه با نانوسیلیس به طرح اختلاط بتن اضافه و نمونه‌ها ساخته و عمل‌آوری شدند. از نمونه‌ها آزمون مقاومت کششی غیر‌مستقیم و مقاومت خمش سه‌ نقطه‌ای گرفته شد. نتایج نشان داد استفاده از الیاف هیبریدی و نانوسیلیس سبب افزایش مقاومت‌های فشاری، کششی و خمشی بتن ژئوپلیمری می‌شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Experimental Study of the Effect of 2-Element Hybrid Copolymer Fibers and Nano-Silica Particles on Compressive, Tensile and Flexural Strengths of Metakaolin-Based Geopolymer Concrete

نویسندگان [English]

  • Amir Bahador Moradikhou 1
  • Mir Hamid Hosseini 2
  • Azam Mousavi Kashi 3
  • Fereshteh Emami 4
  • Alireza Esparham 5
1 MSc. Student of civil, structural, and geotechnics engineering department, Islamic Azad University, Science and Research branch, Tehran, Iran
2 Assistant professor of civil, structural, and geotechnics engineering department, Islamic Azad University, Science and Research branch, Tehran, Iran
3 Assistant professor of materials engineering department, Islamic Azad University, Science and Research branch, Tehran, Iran
4 Assistant professor of civil, structural, and geotechnics engineering department, Islamic Azad University, Science and Research branch, Tehran, Iran
5 MSc. Student of civil, structural, and geotechnics engineering department, Islamic Azad University, Science and Research branch, Tehran, Iran
چکیده [English]

In recent years, geopolymers, as a new class of green cement binders, have gained significant attention as an environmental-friendly alternative to ordinary Portland cement. In this paper, the effect of 2-element hybrid fibers and nano-silica particles on compressive, tensile and flexural strengths of metakaolin-based geopolymer concrete, were studied. First, Preliminary tests were conducted to reach the optimum mixture designs. Then, fibers were added in various ratios with nano silica particles to the concrete mixtures and geopolymer specimens were prepared to study the behavior of geopolymer fibers reinforced metakaolin-based concrete. After curing, specimens were subjected to the indirect tensile and 3-pointflexural strengths tests. The test results showed that using 2-element hybrid fibers and nano-silica particles increases the compressive, tensile and flexural strengths of geopolymer concrete.

کلیدواژه‌ها [English]

  • Geopolymer
  • Fibers Reinforced Geopolymer Concrete
  • Hybrid fibers
  • Metakaolin
  • nano-silica
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