بررسی آزمایشگاهی تاثیر سرباره کارخانه فولاد اهواز برخواص بتن های سیمان- سرباره ای

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استاد گروه عمران، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران

2 گروه عمران، واحد قشم، دانشگاه آزاد اسلامی، قشم، ایران

10.22124/jcr.2023.23227.1601

چکیده

در این تحقیق7 طرح اختلاط با %20، %30، %40، %50، %60 و%70 سرباره کارخانه فولاد اهواز به‌‌صورت پودر شده جایگزین بخشی از سیمان شدند و نمونه‌‌های ساخته‌‌شده در سنین 28، 56، 91 و 120 روزه تحت آزمایش‌‌های لازم قرار گرفتند. آزمایش‌‌های اسلامپ، وزن مخصوص بتن تازه، مقاومت فشاری، مقاومت کششی دو‌نیم شدن، مقاومت الکتریکی، جذب آب حجمی و عمق نفوذ آب نمونه‌‌های ساخته‌‌شده، از بتن‌‌های مرجع و سیمان- سرباره‌ای انجام‌ شدند. نتایج نشان داد که پودر سرباره تا سن 56 روزه بر خواص مکانیکی نمونه‌‌ها اثر قابل‌‌ملاحظه‌ای نداشته، اما با گذشت زمان، مقاومت فشاری نمونه‌‌ حاوی %40 سرباره در سن 120 روزه نسبت به نمونه مرجع %1 و همین‌طور مقاومت کششی دو‌نیم شدن نمونه‌های حاوی %30 سرباره در سن 120 روزه نسبت به نمونه مرجع %4 افزایش نشان دادند، هرچند مقدار افزایش %1 ناچیز به نظر می‌رسد، اما نشانگر این است که تا سن 120 روز سرباره دارای اثر مثبت بر مقاومت فشاری است. درصد جذب آب در سن 120 روزه در نمونه‌ حاوی %40 سرباره، نسبت به نمونه مرجع %4/3 افزایش نشان داد. مقاومت الکتریکی نمونه حاوی %40 سرباره در سن 120 روزه %37 کاهش و عمق نفوذ آب در نمونه حاوی %40 سرباره نسبت به نمونه مرجع نیز 8/2میلی‌متر افزایش نشان دادند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Experimental study of the Ahvaz steel plant slag on properties of cement-slag concretes

نویسندگان [English]

  • Seyed Fathollah Sajedi 1
  • Gholam Abbas Bahraminia 2
1 Professor, Department of Civil Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
2 Department of Civil Engineering, Qeshm branch, Islamic Azad university, Qeshm, Iran
چکیده [English]

Seven mixing plans with, 20%, 30%, 40%, 50%, 60% and 70% of slag in powdered form replaced part of the cement and the specimens were made at the ages of 28, 56, 91 and 120 days. They were subjected to the necessary tests. Slump tests, specific weight of fresh concrete, compressive strength, tensile strength of halving, electrical resistance, volumetric water absorption and depth of water penetration of the specimens made from reference concrete and cement-slag were performed. The results showed that the slag powder had no significant effect on mechanical properties of the specimens until the age of 56 days, but with the passage of time, the compressive strength of the specimen containing 40% slag at the age of 120 days was 1% compared to the reference specimen. In terms of tensile strength, specimens containing 30% slag at the age of 120 days showed an increase of 4% compared to the reference specimen; although the increase of 1% seems insignificant, but it indicates that until the age of 120 days, the slag has a positive effect on compressive strength, it is worth mentioning. The percentage of water absorption at the age of 120 days in the specimen containing 40% slag showed an increase of 3.4% compared to the reference specimen. In addition, the electrical resistance of the specimen containing 40% slag at the age of 120 days decreased by 37% and the water penetration depth in the specimen containing 40% slag increased by 2.8 mm compared to the reference specimen.

کلیدواژه‌ها [English]

  • Cement-slag concrete
  • Mechanical properties
  • Durability
  • Ahvaz steel plant slag

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