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بررسی خصوصیات مکانیکی، دوامی و عملکردی ملاتهای ترمیمی پایه سیمانی حاوی ضایعات صنایع آهن و آلومینیوم | ||
تحقیقات بتن | ||
مقاله 5، دوره 15، شماره 1 - شماره پیاپی 37، فروردین 1401، صفحه 41-57 اصل مقاله (1.26 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22124/jcr.2022.20837.1523 | ||
نویسندگان | ||
احمدرضا رمضانی1؛ محمدرضا اصفهانی* 2 | ||
1گروه مهندسی عمران، دانشکده مهندسی، دانشگاه فردوسی مشهد، مشهد، ایران | ||
2گروه مهندسی عمران ،دانشکده مهندسی، دانشگاه فردوسی مشهد ،مشهد | ||
چکیده | ||
در پژوهش حاضر از ضایعات صنایع آهن و آلومینیوم (غبار کوره آهنگدازی، سرباره کوره آهنگدازی و گل قرمز) برای جایگزینی بخشی از سیمان در ساخت ملاتهای ترمیمی استفاده شده است. با جایگزینی 5%، 10% و 15% از این ضایعات با سیمان در مجموع 14 طرح اختلاط ساخته شد و مطالعات آزمایشگاهی در سه بخش بر روی آنها انجام شد. در بخش اول سعی در شناخت ریزساختار و ترکیبات شیمیایی مواد تشکیلدهنده ملاتها شده است. دربخش دوم با انجام آزمایشهای مقاومت در برابر حمله اسید سولفوریک، جذب آب و مقاومت الکتریکی تلاش برای شناخت خصوصیات دوامی و با انجام آزمایشهای مقاومت فشاری وکششی سعی در شناخت خصوصیات مکانیکی ملاتها شده است. در بخش آخر، یک تیر بتن مسلح به وسیله ملات ترمیمی و شبکه CFRP تقویت برشی شده و با یک تیر فاقد تقویت و یک تیر تقویت شده در برش با ورقهای CFRP و چسب مقایسه شده است. در نهایت تیرها تحت بارگذاری متمرکز در یک نقطه قرار گرفته و ظرفیت برشی آنها با یکدیگر مقایسه شده تا عملکرد ملات ترمیمی ارزیابی گردد. نتایج آزمایشها نشان میدهد که تقویت با استفاده از ملات ترمیمی باعث افزایش ظرفیت برشی به میزان 23% در مقایسه با نمونه کنترل شده است در حالی که نمونه تقویت شده با چسب %14 افزایش ظرفیت برشی نسبت به نمونه کنترل از خود نشان داده است. | ||
کلیدواژهها | ||
ملات ترمیمی؛ ضایعات صنایع آهن و آلومینیوم؛ تقویت برشی؛ پلیمر مسلح الیافی (CFRP) | ||
مراجع | ||
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