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بررسی آزمایشگاهی تاثیر سرباره کارخانه فولاد اهواز بر خواص ملاتهای سیمان- سرباره‌ای | ||
| نشریه مهندسی عمران امیرکبیر | ||
| مقاله 17، دوره 54، شماره 9، آذر 1401، صفحه 3557-3580 اصل مقاله (1.23 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/ceej.2022.20414.7416 | ||
| نویسندگان | ||
| سیدفتح اله ساجدی* 1؛ سیدحمید هاشمی2 | ||
| 1دانشکده مهندسی عمران، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران | ||
| 2دانشکده مهندسی عمران، واحد قشم، دانشگاه آزاد اسلامی، قشم، ایران | ||
| چکیده | ||
| یکی از راه‌های بهسازی تولید سیمان، جایگزینی بخشی از آن با مواد افزودنی ارزان قیمت و در دسترس است که پوزولانهای طبیعی و مصنوعی از جمله این مواد هستند. با توجه به اهمیت کاربرد ملاتهای سیمانی در ساخت سازه‌های بنایی و همچنین تأثیر استفاده از سرباره بر خواص این نوع ملات ها، تاثیر سرباره تولیدی از کارخانه فولاد اهواز که به دلیل تفاوت قابل‌توجه در ترکیبات شیمیایی آن نسبت به سرباره‌های متداول در دنیا یک سرباره خاص است، بر خواص رئولوژی، مکانیکی و دوامی ملات ها بررسی شده است. در این تحقیق، تاثیر استفاده از پودر سرباره کارخانه فولاد اهواز در ساخت ملات های سیمان- سرباره ای بررسی شد. پودر این سرباره در درصدهای 20 تا 70 با افزایش های ده درصدی، جایگزین بخشی از سیمان شد و نمونه ها در سنین 28، 56، 91 و 120 روزه تحت آزمایش قرار گرفتند. آزمایشهای میز جریان، مقاومتهای فشاری، خمشی، و الکتریکی، و همین طور دو آزمایش عمق نفوذ و جذب آب انجام شدند. نتایج نشان داد که پودر سرباره در سنین 28 و 56 روزه بر خواص مکانیکی نمونه ها اثر زیادی نداشت، اما در سن 120 روزه مقاومت های فشاری و خمشی نمونه های حاوی 20% و 30% پودر سرباره، نسبت به نمونه مرجع افزایش داشتند؛ از منظرهای فنی و اقتصادی، 30% به عنوان درصد بهینه جایگزینی پیشنهاد می‌شود. جذب آب در سن 120 روزه در نمونه‌های حاوی 20% و 30% سرباره، به ترتیب 30% و 61% و عمق نفوذ آب 25% و 33%، نسبت به نمونه مرجع افزایش نشان دادند؛ اما مقاومت الکتریکی به اندازه 11% و 23% کاهش یافتند. | ||
| کلیدواژه‌ها | ||
| ملات سیمان- سرباره‌ای؛ خواص مکانیکی؛ دوام؛ پودر سرباره؛ کارخانه فولاد اهواز | ||
| موضوعات | ||
| تکنولوژی بتن | ||
| عنوان مقاله [English] | ||
| Experimental study of the effect of slag of Ahvaz Steel Plant on the properties of cement-slag mortars | ||
| نویسندگان [English] | ||
| Seyed Fathollah Sajedi1؛ Seyed Hamid Hashemi2 | ||
| 1Associate professor, Department of Civil Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran | ||
| 2PhD student, Department of Civil Eignieerng, Qeshm Branch, Islamic Azad University, Qeshm, Iran | ||
| چکیده [English] | ||
| One way to improve cement production is to replace some of it with inexpensive and available additives. Considering the importance of using cement mortars in the construction of masonry structures, the effect of slag produced by Ahwaz Steel Plant, which is a special slag due to significant differences in its chemical composition compared to common slags in the world. The rheological, mechanical and durability properties of mortars were studied. The effect of using slag powder from Ahwaz Steel Plant on the production of cement-slag mortars was investigated. The powder of this slag was replaced with a part of cement at 20% to 70% with 10% increases and the specimens were tested at the ages of 28, 56, 91 and 120 days. Flow table, compressive, flexural, and electrical strength as well as two penetration depth and water absorption tests were performed. The results showed that slag powder at 28 and 56 days of age did not have much effect on the mechanical properties of the specimens, but at 120 days of age the compressive and flexural strengths of specimens containing 20% and 30% of slag powder increased compared to the reference sample; From a technical and economic point of view, 30% is suggested as the optimal replacement percentage. Water absorption at 120 days of age in specimens containing 20% and 30% slag increased by 30% and 61% and water penetration depth of 25% and 33%, respectively, compared to the reference specimen; but the electrical resistance decreased by 11% and 23%, respectively. | ||
| کلیدواژه‌ها [English] | ||
| Cement-slag mortar, Mechanical properties, Durability, Slag, Ahvaz Steel Plant | ||
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| مراجع | ||
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