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ارزیابی خواص بتنهای خودتراکم حاوی سرباره کارخانه فولاد اهواز | ||
| نشریه مهندسی عمران امیرکبیر | ||
| دوره 57، شماره 3، 1404، صفحه 469-488 اصل مقاله (1.13 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/ceej.2025.21931.7863 | ||
| نویسندگان | ||
| سیدمحسن کالوندی* 1؛ سیدفتح اله ساجدی2؛ فریدون مقدس نژاد3 | ||
| 1گروه مهندسی عمران، واحد قشم، دانشگاه آزاد اسلامی، قشم، ایران | ||
| 2گروه مهندسی عمران، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران | ||
| 3دانشکده مهندسی عمران و محیط زیست، دانشگاه صنعتی امیرکبیر، تهران، ایران | ||
| چکیده | ||
| بتن خودتراکم، بتنی است که همزمان سه ویژگی، توانایی جریان تحت وزن خود، پر کردن فضای کامل قالب و ایجاد یک مخلوط چگال و نسبتا همگن را بدون نیاز به عملیات تراکم را داشته باشد. سرباره کارخانه فولاد اهواز استفاده گردید. این سرباره در ترکیبات شیمیایی خود تفاوت قابلتوجهی با سربارههای متداول در دنیا دارد و به همین دلیل، در ساخت بتن خودتراکم استفاده گردید. در ساخت نمونهها %25، %35، %45، %50 و %60 پودر سرباره، جایگزین بخشی از سیمان شد و نمونهها در سنین 28، 56، 91 و120 روزه آزمایش شدند. آزمایشهای مربوط به رئولوژی بتن شامل جریان اسلامپ، قیف Vو جعبه L انجام شدند. مقاومت فشاری و آزمایش ضریب ارتجاعی استاتیکی از خواص مکانیکی و آزمایشهای مرتبط با دوام شامل مقاومت الکتریکی، عمق نفوذ آب و جذب حجمی آب انجام گردیدند. طبق آزمایشهای انجامشده، درصد بهینه پودر مصرفی به میزان %25 تعیین شد. آزمایش اسلامپ نمونه حاوی درصد بهینه پودر سرباره، افزایش %14 را نسبت به نمونه مرجع نشان داد. در آزمایش مقاومت فشاری، نمونههای حاوی درصد بهینه پودر سرباره در سن 120 روزه، نسبت به نمونه مرجع افزایش داشتند. بررسی نتایج عمق نفوذ آب و همینطور درصد جذب حجمی آب %4 افزایش را نشان دادند. ضریب ارتجاعی استاتیکی نمونههای حاوی درصد بهینه پودر سرباره به مقدار %4/8 نسبت به نمونه مرجع در سن 120روزه افزایش داشتند. بررسی نتایج عمق نفوذ آب و درصد جذب حجمی آب در نمونههای حاوی درصد بهینه پودر سرباره، به ترتیب به میزان %12/5 و %16/6 در سن 120روزه، کاهش نشان دادند. | ||
| کلیدواژهها | ||
| بتن خودتراکم؛ سرباره کارخانه فولاد اهواز؛ رئولوژی؛ خواص مکانیکی؛ دوام | ||
| موضوعات | ||
| تکنولوژی بتن | ||
| عنوان مقاله [English] | ||
| Evaluation of Properties of Self-Compacting Concrete Containing Slag from Ahvaz Steel Plant | ||
| نویسندگان [English] | ||
| Seyed Mohsen Kalvandi1؛ SeyedFatollah Sajedi2؛ Fereidoon Moghadas Nejad3 | ||
| 1Department of Civil Engineering, Qeshm Branch, Islamic Azad University, Qeshm, Iran | ||
| 2Department of Civil Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran | ||
| 3Department of Civil and Environmental Engineering, AUT (Tehran Polytechnic), Tehran, Iran | ||
| چکیده [English] | ||
| Self-compacting concrete (SCC) is concrete that simultaneously has three characteristics: the ability to flow under its own weight, fill the entire mold space, and create a dense and relatively homogeneous mixture without the need for compaction. Slag from the Ahvaz Steel Plant was used. This slag has a significant difference in its chemical composition from common slags in the world, and for this reason, it was used in the manufacture of SCC. In the manufacture of samples, 25%, 35%, 45%, 50%, and 60% of slag powder replaced part of the cement, and the samples were tested at ages of 28, 56, 91, and 120 days. Concrete rheology tests including slump flow, V-funnel, and L-box were performed. Compressive strength and static modulus of elasticity (EC) tests were performed, and durability tests including electrical resistance, water penetration depth, and volumetric water absorption were performed. According to the tests performed, the optimal percentage of powder used was determined to be 25%. The slump test of the sample containing the optimal percentage of slag powder showed an increase of 14% compared to the reference sample. In the compressive strength test, the samples containing the optimal percentage of slag powder showed an increase of 4% compared to the reference sample at the age of 120 days. The results showed an increase in the water penetration depth and the volumetric water absorption percentage by 4%. The EC of the samples containing the optimal percentage of slag powder increased by 4.8% compared to the reference sample at the age of 120 days. The results showed a decrease in the water penetration depth and the volumetric water absorption percentage in the samples containing the optimal percentage of slag powder by 12.5% and 16.6%, respectively, at the age of 120 days. | ||
| کلیدواژهها [English] | ||
| Self-Compacting Concrete, Ahvaz Steel Plant Slag, Rheology, Mechanical Properties, Durability | ||
| مراجع | ||
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