مصالح و سازه های بتنی

مصالح و سازه های بتنی

مقایسه اثر خرده بلوک سیمان و ضایعات ساختمانی بر خواص تازه و سخت شده بتن خودتراکم

نوع مقاله : مقاله پژوهشی

نویسندگان
1 استادیار گروه عمران، دانشکده فنی و مهندسی، دانشگاه صنعتی خاتم الانبیاء (ص) بهبهان، بهبهان، ایران
2 دانشجوی کارشناسی ارشد مهندسی عمران- سازه، دانشکده فنی و مهندسی، دانشگاه صنعتی خاتم الانبیاء(ص) بهبهان، بهبهان، ایران
چکیده
بتن خودتراکم به دلیل کارایی، روانی، مقاومت و دوام به طور گسترده‌ای در ساخت و ساز استفاده می‌شود. با افزایش نگرانی‌های زیست‌محیطی درباره دفع زباله‌های جامد و محدودیت فضای دفن زباله، این پژوهش به بررسی استفاده از ضایعات ساختمانی و خرده بلوک‌های سیمانی به عنوان مواد افزودنی در بتن خودتراکم پرداخته است. درصدهای مختلف این مواد (0، 25، 50، 75، 100 درصد وزنی ماسه) آزمایش شد. خواص تازه بتن با آزمون‌های جریان اسلامپ، قیف V، جعبه L، حلقه J و جعبه U و خواص سخت شده با آزمایش‌های مقاومت فشاری، مقاومت کششی و نفوذپذیری ارزیابی شد. این پژوهش از ژل نانو سیلیس و VMA برای افزایش مقاومت، گرانروی و خواص رئولوژیکی بتن استفاده کرد. نتایج نشان داد که افزودن خرده بلوک‌های سیمانی به دلیل تخلخل و جذب آب، عملکرد بتن خودتراکم را بهبود می‌بخشد. همچنین مقاومت فشاری و کششی نمونه‌های بتن خودتراکم حاوی ضایعات، در 28 روز، به ترتیب 9/73%، 13/53% و 5/85%، 11/30% نسبت به نمونه‌های شاهد افزایش یافته است. این تحقیق نشان می‌دهد که ضایعات ساختمانی می‌توانند کیفیت بتن خودتراکم را بهبود داده و به پایداری زیست‌محیطی کمک کنند.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Comparison of the effect of crushed cement block and construction waste on fresh and hardened properties of self-compacting concrete

نویسندگان English

Mahbobeh Mirzaie Aliabadi 1
Mohammad Sadegh Shahidzadeh 1
Hossein Piran shahi 2
Heydar Rashidi Fard 2
Amir Hossein Derakhshan Nezhad 2
1 Assistant Professor, Department of Civil Engineering, Technical and Engineering Faculty, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran
2 Master's student in civil-structural engineering, Department of Civil Engineering, Technical and Engineering Faculty, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran
چکیده English

Self-compacting concrete is widely used in construction due to its efficiency, fluidity, resistance and durability. With increasing environmental concerns about solid waste disposal and the limitation of landfill space, this research has investigated the use of construction waste and small cement blocks as additives in self-compacting concrete. Different percentages of these materials (0, 25, 50, 75, 100 percent by weight of sand) were tested. Fresh concrete properties were evaluated by slump flow, V funnel, L box, J ring and U box tests and hardened properties were evaluated by compressive strength, tensile strength and permeability tests. This research used nano silica gel and VMA to increase the strength, viscosity and rheological properties of concrete. The results showed that the addition of small cement blocks improves the performance of self-compacting concrete due to porosity and water absorption. Also, the compressive and tensile strength of self-compacting concrete samples containing waste increased by 9.73%, 13.53% and 5.85%, 11.30%, respectively, compared to the control samples. This research shows that construction waste can improve the quality of self-compacting concrete and contribute to environmental sustainability.

کلیدواژه‌ها English

self-compacting concrete
crushed cement block
construction waste
compressive strength
tensile strength
permeability
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  • تاریخ دریافت 25 اسفند 1402
  • تاریخ بازنگری 07 خرداد 1403
  • تاریخ پذیرش 08 خرداد 1403