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منصورقناعی, محمدحسین, بیک لریان, مرتضی, مردوخ پور, علیرضا. (1401). بررسی مقاومت ضربه‌ای، ریزساختاری و کاهش وزن در بتن ژئوپلیمر پوزولانی حاوی الیاف، تحت حرارت بالا. پدافند الکترونیکی و سایبری, 13(3), 11-23.
محمدحسین منصورقناعی; مرتضی بیک لریان; علیرضا مردوخ پور. "بررسی مقاومت ضربه‌ای، ریزساختاری و کاهش وزن در بتن ژئوپلیمر پوزولانی حاوی الیاف، تحت حرارت بالا". پدافند الکترونیکی و سایبری, 13, 3, 1401, 11-23.
منصورقناعی, محمدحسین, بیک لریان, مرتضی, مردوخ پور, علیرضا. (1401). 'بررسی مقاومت ضربه‌ای، ریزساختاری و کاهش وزن در بتن ژئوپلیمر پوزولانی حاوی الیاف، تحت حرارت بالا', پدافند الکترونیکی و سایبری, 13(3), pp. 11-23.
منصورقناعی, محمدحسین, بیک لریان, مرتضی, مردوخ پور, علیرضا. بررسی مقاومت ضربه‌ای، ریزساختاری و کاهش وزن در بتن ژئوپلیمر پوزولانی حاوی الیاف، تحت حرارت بالا. پدافند الکترونیکی و سایبری, 1401; 13(3): 11-23.

بررسی مقاومت ضربه‌ای، ریزساختاری و کاهش وزن در بتن ژئوپلیمر پوزولانی حاوی الیاف، تحت حرارت بالا

پدافند غیرعامل
دوره 13، شماره 3 - شماره پیاپی 51، آذر 1401، صفحه 11-23    اصل مقاله (2.03 M)
نوع مقاله: مقاله پژوهشی
نویسندگان
محمدحسین منصورقناعی1؛ مرتضی بیک لریان* 2؛ علیرضا مردوخ پور3
1دکتری تخصصی عمران سازه، گروه مهندسی عمران، واحد چالوس، دانشگاه آزاد اسلامی، چالوس، ایران
2استادیار گروه مهندسی عمران، واحد چالوس، دانشگاه آزاد اسلامی، چالوس، ایران
3استادیار گروه مهندسی عمران، واحد لاهیجان، دانشگاه آزاد اسلامی، لاهیجان، ایران
تاریخ دریافت: 19 مهر 1400،  تاریخ بازنگری: 23 خرداد 1401،  تاریخ پذیرش: 05 شهریور 1401 
چکیده
امروزه ساخت سازه­هایی با اهمیت خیلی زیاد (نظیر سازه­های نظامی، تاسیسات هسته­ای، بیمارستان­ها و تأسیسات زیربنایی)، با مقاومت بالا در برابر بارهای ضربه­ای و حرارت زیاد، در حوزه پدافند غیرعامل از اهمیت ویژه­ای برخوردار است. در این راستا، تولید بتن پر مقاومت و دوستدار طبیعت به‌عنوان مصالح اصلی به‌کار رفته در این نوع از سازه­ها نقش مهمی را ایفاء می­کند. در این مقاله به بررسی آزمایشگاهی خصوصیات بتن ژئوپلیمر سرباره­ای حاوی0 الی 8 درصد نانوسیلیس و 1 الی 2 درصد الیاف پلی­اولفین پرداخته شده است. نمونه­های بتنی ساخته شده در سن عمل­آوری 90 روزه و در دمای 25 و 500 درجه سلسیوس تحت آزمون ضربه وزنه­افتان، کاهش وزن، تصویربرداری میکروسکوپ الکترونی روبشی (SEM) و طیف­سنجی پراش اشعه­ایکس (XRD) قرار گرفتند، آنالیز طیف­سنجی فلورسانس اشعه­ایکس (XRF) نیز در دمای 25 درجه سلسیوس و در سن 7 روز عمل­آوری بر روی نمونه­های بتنی انجام گرفت. نتایج حاصله حاکی از تضعیف ریزساختار بتن در معرض حرارت بالا است، بهبود نتایج حاصل از آزمون­ها در بتن ژئوپلیمری نسبت به بتن معمولی مشهود است. بهترین و ضعیف­ترین عملکرد در آزمون کاهش وزن نمونه­ها متعلق به بتن ژئوپلیمری حاوی 8 درصد نانوسیلیس و بتن ژئوپلیمری حاوی 8 درصد نانوسیلیس و 2 درصد الیاف، به ترتیب به میزان 061/0 و 12/0 درصد افت وزن نمونه می­باشد. بهترین عملکرد در میزان جذب انرژی ضربه وزنه­افتان در دمای 25 و 500 درجه سلسیوس متعلق به بتن ژئوپلیمری (حاوی 8 درصد نانوسیلیس و 2 درصد الیاف) به ترتیب به میزان 25/2928 و 44/773 ژول است. بیشترین و کمترین میزان افت در انرژی جذب­شده نمونه­های بتنی تحت دمای500 درجه سلسیوس نسبت به دمای 25 درجه سلسیوس، متعلق به بتن معمولی و بتن ژئوپلیمری (حاوی 8 درصد نانوسیلیس) به ترتیب به میزان 33/83 و 33/53 درصد است.
 
کلیدواژه‌ها
بتن ژئوپلیمری؛ سرباره کوره آهنگدازی؛ نانوسیلیس؛ الیاف پلی اولفین؛ کاهش وزن
عنوان مقاله [English]
Investigation of the Impact Resistance, Microstructure and Weight Loss in Fibrous Pozzolanic Concrete Containing Fibers, Under High Temperatures
نویسندگان [English]
Mohammadhossein Mansourghanaei1؛ Morteza Biklaryan2؛ Alireza Mardookhpour3
1Department of Civil Engineering, Chalous Branch, Islamic Azad University, Chalous, Iran
2Department of Civil Engineering, Chalous Branch, Islamic Azad University, Chalous, Iran
3Department of Civil Engineering, Lahijan Branch, Islamic Azad University, Lahijan, Iran
چکیده [English]
Today, the construction of highly critical structures (such as military and nuclear structures, hospitals and infrastructures), with high resistance to impact loads and high temperatures, is of particular importance in the field of passive defense. In this regard, the production of           high-strength and nature-friendly concrete as the main material used in these types of structures plays a significant role. In this paper, the laboratory properties of the slag geopolymer concrete containing 0 to 8% nanosilica and 1 to 2% polyalphin fibers have been investigated. The concrete samples made at 90 days of curing age at 25 and 500 °C Celsius underwent weightlifting, weight loss, scanning electron microscopy (SEM), X-ray diffraction (XRD) spectroscopy, and X-ray fluorescence (XRF) at 25 °C. At the age of seven days, the processing was performed on the concrete samples. The results indicate the weakening of the microstructure of concrete exposed to high temperatures. Also, the improvement of test results in the geopolymer concrete compared to ordinary concrete is evident. The best and worst performance in the weight loss test of the samples belonged to the geopolymer concrete containing 8% nanosilica and the geopolymer concrete containing 8% nanosilica and 2% fibers, by 0.061% and 0.12% weight loss of the sample, respectively. The best performance in the energy absorption of falling weight at 25 and 500 degrees Celsius belongs to the geopolymer concrete (containing 8% nanosilica and 2% fiber) at 2928.25 and 773.44 joules, respectively. The highest and lowest energy loss of concrete samples at 500 °C compared to 25 °C belong to the ordinary concrete and the geopolymer concrete (containing 8% nanosilica) by 83.33% and 53.33%, respectively.
کلیدواژه‌ها [English]
Geopolymer Concrete, Blast Furnace Slag, Nano Silica, Polyolefin Fibers, Weight Loss
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