مطالعه آزمایشگاهی تأثیر سن، دما و میزان الیاف بر رفتار باتارد مسلح دوستدار محیط‌زیست

نوع مقاله : مقاله کامل پژوهشی

نویسندگان

1 گروه مهندسی عمران، دانشگاه فنی و حرفه ای، تهران

2 گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه شهید باهنرکرمان

چکیده

از نقایص تثبیت خاک با آهک می­توان به کاهش مقاومت در اثر اشباع شدن و رفتار نامطلوب ترد آن اشاره نمود. که آن­ها را می­توان به ترتیب با استفاده از سیمان در کنار آهک (باتارد) (Bastard mortar) و نیز تسلیح باتارد به­ کمک الیاف برطرف نمود. در پژوهش حاضر نمونه ­هایی با درصد الیاف مختلف جهت آزمایش مقاومت فشاری تک­ محوری، به­ منظور بررسی تأثیر سن، درجه حرارت عمل­ آوری و میزان ‌الیاف به ­عنوان تعدادی از عوامل تأثیرگذار بر پارامترهای ژئوتکنیکی باتارد مسلح، ساخته شد. این نمونه‌ها در سنین و دماهای مختلف، عمل­ آوری و تست شده و پارامترهای متعددی از آن­ها نظیر: مقاومت فشاری تک­ محوری، مدول الاستیسیته (Modulus of elasticity) و ... محاسبه گردید. نتایج نشان داد که واکنش‌های پوزولانی، سن و درجه حرارت عمل ­آوری نقش مؤثری در بالا بردن پارامترهای مقاومتی نمونه‌ها داشته و وجود الیاف نیز نقش مهمی در شکل ­پذیر کردن رفتار نمونه‌ها دارند به ­طور مثال کرنش گسیختگی در نمونه­ های سه روزه مسلح با %5/2 الیاف، 75/1 برابر نمونه­ های سه روزه فاقد الیاف مشاهده شد. مدول الاستیسیته نمونه ­هایی که 21 روز و در دمای oC60 عمل ­آوری شده­ اند بیش از 3 برابر مقدار متناظر در نمونه­ های 14 روزه عمل ­آوری شده در دمای oC30 است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Laboratory Study of the Effect of Age, Temperature, and Fiber Content on the Behavior of Environmentally Friendly Reinforced Lime-Cement Concrete (RLCC)

نویسندگان [English]

  • Mohammad Mostafa Jafari 1
  • Mohammad Hossein Bagheripour 2
1 Department of Civil Engineering, Technical and Vocational University (TVU), Tehran, Iran
2 Department of Civil Engineering, Faculty of Technical and Engineering, Shahid Bahonar University, Kerman, Iran
چکیده [English]

Current research has tried to study the effects of curing ages, curing temperature and Recycled Tire Polymer Fibers (RTPF) content on geotechnical properties of RLCC, such as unconfined compressive strength (UCS), secant modulus (Es), strain frailure ( and deformability index (. The UCS test is a criterion to estimate the geotechnical parameters of RLCC samples in the presented research.

کلیدواژه‌ها [English]

  • Reinforced Lime-Cement-Concrete (RLCC)
  • Curing age
  • Recycled Tire Polymer Fibers (RTPF)
  • Uniaxial Compressive Strength (UCS)
  • Modulus of elasticity
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