استفاده‌ از حجم زیاد پودر شیشه به عنوان جایگزین سیمان در بتن‌ خودتراکم

نوع مقاله : مقاله پژوهشی

نویسندگان

1 عضو هیات علمی /مرکز تحقیقات راه مسکن و شهرسازی

2 گروه مهندسی عمران، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران

10.30478/jcsm.2022.350039.1283

چکیده

استفاده از پودر شیشه با حجم زیاد به عنوان جایگزین سیمان می‌تواند مزایای اقتصادی و محیط زیستی زیادی داشته باشد. در این تحقیق رفتار بتن‌های خودتراکم حاوی پودر شیشه (تا 180 کیلوگرم در مترمکعب) و خرده شیشه‌های ضایعاتی (تا 600 کیلوگرم در مترمکعب) مورد بررسی قرار گرفته است. به این منظور از آزمایش‌های روانی، پایداری و لزجت برای بتن خودتراکم تازه‌ و از آزمایش‌های مقاومت فشاری، مقاومت الکتریکی، نفوذ تسریع‌شده یون کلرید و عکس‌های میکروسکوپ الکترونی روبشی برای بررسی بتن در حالت سخت شده استفاده شده است. نتایج آزمایش‌ها نشان می‌دهد که با جایگزینی وزنی سیمان با پودر شیشه تا 40 درصد، نتایج آزمایش‌های مقاومت فشاری، مقاومت الکتریکی و مقاومت در برابر نفوذ یون کلرید بهبود قابل توجهی پیدا می‌کند. همچنین، خرده شیشه‌های ضایعاتی می‌تواند تاثیر قابل توجهی بر خصوصیات بتن تازه خودتراکم داشته باشد و سبب افزایش مصرف فوق روان‌کننده، آب انداختگی، جداشدگی و لزجت بتن شود. در این تحقیق نشان داده شد که با استفاده‌ی همزمان از پودر شیشه و خرده شیشه‌های ضایعاتی تا یک سوم حجم بتن می‌توان به نتایج مطلوبی دست یافت.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

The Use of high Volume of Glass Powder as a Substitute for Cement in Self-Compacting Concrete

نویسندگان [English]

  • Babak Ahmadi 1
  • Saeed Khalooee 2
1 Faculty Member/ Road, Housing & Development Research Center
2 Department of Civil Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
چکیده [English]

The use of waste glass aggregates as a substitute for fine natural aggregate and glass powder as a substitute for cement can have economic and environmental benefits. In this study, the behavior of self-compacting concretes containing waste glass aggregate (up to 600 kg / m3) and glass powder (up to 180 kg / m3) has been investigated. For this purpose, flowability, stability, and viscosity of self-compacting concrete in fresh state and compressive strength, electrical resistance, resistance to chloride ion penetration and scanning electron microscopy images in hardened state were examined. The results of experiments show that the use of waste glass can have a significant effect on the properties of fresh self-compacting concrete and can increase the use of superplasticizer and potential of bleeding and segregation. Also, by replacing cement with glass powder up to 40%, the results of compressive strength, electrical resistance and chloride ion penetration resistance tests were significantly improved. In this study, it was shown that with the simultaneous use of glass powder and glass aggregates up to one third of the concrete volume, desirable results can be achieved.

کلیدواژه‌ها [English]

  • Self-Compacting Concrete
  • Glass Powder
  • Glass Aggregate
  • Waste Glass
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  • تاریخ دریافت: 11 تیر 1401
  • تاریخ بازنگری: 09 شهریور 1401
  • تاریخ پذیرش: 31 شهریور 1401
  • تاریخ اولین انتشار: 31 شهریور 1401