بررسی تأثیر مواد باطله معدن مس بر روی رفتار تنش- کرنش بتن محصورشده

نوع مقاله : مقاله کامل پژوهشی

نویسندگان

دانشکده مهندسی عمران، دانشگاه تبریز

چکیده

شروع ترک‌خوردگی بین سنگ‌دانه و خمیر سیمان را می­توان آغاز رفتار غیر الاستیک بتن به‌حساب آورد. پاسخ بتن برای این حوزه به توانایی ساختار یا ترکیبات آن بستگی دارد. برای بررسی این موضوع استفاده از محصورکننده جانبی می­تواند راه‌حل مناسبی باشد. این تحقیق قصد دارد که اثرات محصورشدگی و رفتار تنش- کرنش بتن سبز سازه­ای ساخته‌شده با مواد باطله معدن مس را مورد مطالعه قرار دهد. چهار نوع طرح اختلاط برای بررسی اثرات مواد باطله بر رفتار تنش- کرنش بتن محصورشده طراحی گردید. میزان مواد باطله جایگزین سیمان مصرفی با درصدهای صفر، 10، 15 و 20 در مخلوط بتن منظور شد. میلگرد دور پیچ محصورشدگی با گام‌های 75، 50 و 25 میلی‌متر (نسبت حجمی 01/1، 52/1 و 04/3 درصد) در نمونه‌های بتن تعبیه گردید. بر اساس نتایج آزمایش­های انجام ‌شده به‌کارگیری مواد باطله معدن مس در بتن محصورشده قادر به بهبود مقاومت و شکل‌پذیری آن نسبت به بتن معمولی است. در این خصوص یک مدل تحلیلی برای رفتار تنش- کرنش بتن محصورشده حاوی مواد باطله ارائه ‌شده است.

کلیدواژه‌ها


عنوان مقاله [English]

Investigating the Effect of Copper Mine Tailing on the Stress-Strain Behavior of Confined Concrete

نویسندگان [English]

  • Jamshid Esmaeili
  • Hossein Aslani
Faculty of Civil Engineering, University of Tabriz, Tabriz 5166616471, Iran
چکیده [English]

One of the important factors that affect the concrete behavior is confinement. On the other hand, strength and ductility of concrete depend on the stress–strain characteristics of concrete, which they are also influenced by the confinement of the members (Ahmad and Shah, 1982). Copper mine tailing (CMT) were used to produce environmentally friendly bricks instead of shale and clay by Ahmari and Zhang in 2012. Onuaguluchi and Eren (2016) reported the properties of CMT material used as proper material and a potential additive in mortar and concrete specimens. Huang et al. (2012) studied the application of CMT material to prepare autoclaved aerated concrete. The sum of SiO2, Al2O3 and Fe2O3 in CMT material is 81.88%, which exceeds the 70 percent requirement for class N raw and calcined natural pozzolanas (ASTM C618). Therefore, CMT materials are expected the proper potential to produce pozzolanas (Thomas et al. 2013).

کلیدواژه‌ها [English]

  • Stress-strain behavior
  • Copper mine tailing
  • Confined concrete
  • Green concrete

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