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تاثیر نسبت فعال کننده به چسب بر پارامترهای شکست بتن ژئوپلیمری سبک بر پایه خاکستر بادی | ||
| نشریه مهندسی عمران امیرکبیر | ||
| مقاله 12، دوره 55، شماره 3، خرداد 1402، صفحه 723-738 اصل مقاله (1.98 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/ceej.2023.21003.7594 | ||
| نویسندگان | ||
| محمد رضا عباسی زرگله1؛ موسی مظلوم* 2؛ مجتبی جعفری صمیمی1؛ محمد حسن رامشت1 | ||
| 1دانشکده مهندسی، دانشگاه آزاد اسلامی، واحد تهران مرکزی، تهران، ایران | ||
| 2دانشکدهی مهندسی عمران، دانشگاه تربیت دبیر شهید رجایی، تهران، ایران | ||
| چکیده | ||
| بتن متنوعترین و یکی از پرمصرفترین مصالح ساختمانی است. برای ساخت بتن به مقدار زیادی سیمان پرتلند نیاز است. تولید سیمان پرتلند همراه با تولید مقدار زیادی دی اکسید کربن است که جو را آلوده میکند. علاوه بر آن مقدار زیادی انرژی نیز برای تولید سیمان پرتلند مصرف میشود. از این رو، یافتن یک ماده جایگزین برای سیمان پرتلند اجتناب ناپذیر است. بتن ژئوپلیمری یک ماده ساختمانی نوآورانه است که از اثر شیمیایی مولکولهای معدنی تولید میشود. حذف سیمان پرتلند یکی از مزیتهای بزرگ استفاده از بتن ژئوپلیمری است. به همین دلیل برای شناخت انواع بتن ژئوپلیمری، مطالعه بر روی اجزای مختلف سازنده آن و تاثیر آنها بر پارامترهای شکست اهمیت دارد. در این مقاله نتایج آزمایشهای پارامترهای شکست بتن ژئوپلیمری سبک بر پایه خاکستر بادی کلاس C (Lightweight Fly ash C class-based Geopolymer Concrete) ارائه میشود. این آزمایشها شامل آزمایش خمش سه نقطهای بر روی 36 تیر با نسبت فعال کننده به چسب متفاوت است. همچنین آزمایشهای مقاومت فشاری و مقاومت کششی بر روی بتن سخت شده پس از گذشت 24 ساعت عملآوری انجام شد. در این آزمایشها سه طرح مخلوط با نسبت فعال کننده به چسب 0/4، 0/5 و 0/6 در نظر گرفته شد. با تغییر نسبت فعال کننده به چسب از 0/6 به 0/4، مقاومت فشاری از MPa 18/9 به MPa 28/4، چقرمگی از MPa mm0.5 19/04 به MPa mm0.514/07، انرژی شکست از N/m 17/31 به N/m 20/98 و طول ناحیه فرایند شکست از mm 17/31 به mm 20/98 تغییر یافت. | ||
| کلیدواژهها | ||
| بتن ژئوپلیمری؛ بتن ژئوپلیمری سبک؛ پارامتر شکست؛ عملآوری دمای بالا | ||
| موضوعات | ||
| تکنولوژی بتن | ||
| عنوان مقاله [English] | ||
| Effect of alkaline solution to binder ratio on the fracture parameters of lightweight geopolymer concrete based on fly ash | ||
| نویسندگان [English] | ||
| Mohammad Reza Abbasi Zargaleh1؛ Moosa Mazloom2؛ Mojtaba Jafari Samimi1؛ Mohammad Hassan Ramesht1 | ||
| 1Department of Civil Engineering, Central Tehran Branch Islamic Azad University, Tehran, Iran | ||
| 2Civil Engineering Department, Shahid Rajaee Teacher Training University, Tehran, Iran | ||
| چکیده [English] | ||
| Geopolymer concrete is an innovative building material that is produced by the chemical action of mineral molecules. Removal of cement is one of the great advantages of the use of geopolymer concrete. For this reason, to know the types of geopolymer concrete, it is important to examine its different components and their effect on fracture parameters. In this paper, the fracture parameters of lightweight geopolymer concrete based on class C fly ash (LWFCGC) are presented. In this research, three mix designs with the activator to binder ratios of 0.4, 0.5 and 0.6 were considered. By changing the ratio of activator to glue from 0.6 to 0.4, compressive strength from 18.9 MPa to 28.4 MPa, toughness from 14.07 MPa mm to 19.04 MPa mm 0.5, fracture energy from N/ 17.31 m to 20.98 N/m and the length of the fracture process area changed from 54.12 mm to 29.07 mm. | ||
| کلیدواژهها [English] | ||
| Geopolymer concrete, Lightweight geopolymer concrete, Fracture parameters, High temperature curing | ||
| مراجع | ||
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