ارزیابی نمونه‌های ملات ژئوپلیمری بر پایه پودر لاتریت مسلح شده با الیاف شیشه

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانشجوی دکتری عمران گرایش سازه، دانشکده عمران و معماری، دانشگاه ملایر، ملایر، همدان، ایران

2 استادیار، گروه مهندسی عمران، دانشکده عمران و معماری، دانشگاه ملایر، ملایر، همدان، ایران

3 استادیار، گروه مهندسی مکانیک، دانشکده فنی مهندسی، دانشگاه بناب، بناب، آذربایجان شرقی، ایران

4 عضو هیأت علمی، گروه مهندسی عمران، دانشگاه بناب

چکیده

تولید مصالح ساختمانی با کیفیت بالا و هزینه تولید پایین، یکی از نیازهای صنعت ساخت و ساز در عصر حاضر است. با بهره‌گیری از فناوری ژئوپلیمریزاسیون، امکان تولید مصالح ساختمانی دوستدار محیط زیست مانند ملات، بتن و آجر ژئوپلیمری با مقاومت مکانیکی بالا و کیفیت مطلوب فراهم شده است. یکی از مواد معدنی آلومینوسیلیکاتی قابل استفاده برای تولید ماده چسبنده ژئوپلیمری، لاتریت می‌باشد. برای بهبود هرچه بهتر مقاومت مکانیکی، دوام و مشخصات فیزیکی فرآورده ژئوپلیمری، تسلیح آن با استفاده از الیاف مختلف مانند الیاف شیشه نیز مورد توجه پژوهشگران مختلف بوده است. در پژوهش حاضر با استفاده از آزمون‌های آزمایشگاهی، تأثیر تسلیح ملات ژئوپلیمری بر پایه پودر لاتریت با استفاده از الیاف شیشه مورد مطالعه قرار گرفت. برای ساخت نمونه‌های ملات ژئوپلیمری با پودر لاتریت، فاقد و حاوی الیاف شیشه از محلول قلیایی حاوی سدیم هیدرواکسید 6، 10 و 14 مولار استفاده شد نمونه‌ها پس از 5 دقیقه اختلاط کامل در درون قالب‌های 50×50×50 میلیمتر چوبی و قالب‌های منشوری 160×40×40 میلیمتر ریخته شده و بر روی دستگاه لرزان ویبره زده شد. پس از عمل‌آوری به مدت 3 روز در گرمخانه، مقاومت فشاری و خمشی نمونه‌های ژئوپلیمری و همچنین درصد جذب آب نمونه‌ها اندازه‌گیری شد. نتایج نشان داد که غلظت محلول فعال‌کننده و الیاف شیشه تأثیر قابل ملاحظه‌ای در مقاومت فشاری و خمشی نمونه‌های ژئوپلیمری بر پایه پودر لاتریت با الیاف شیشه دارد. طبق نتایج به دست‌آمده، افزایش مقاومت فشاری 3، 7 و 28 روزه نمونه‌های ژئوپلیمری حاوی الیاف نسبت به نمونه‌های ژئوپلیمری فاقد الیاف بین 10/9 تا 47 درصد متغیر است. طبق نتایج این تحقیق، ساخت مصالح ساختمانی ژئوپلیمری بر پایه پودر لاتریت حاوی الیاف شیشه با مقاومت نسبتاً بالا توصیه می‌شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Evaluation of the laterite powder-based geopolymer mortar samples reinforced with glass fibers

نویسندگان [English]

  • yaser marabi 1
  • Ali Reza Bagherieh 2
  • Hadi Rezghi Maleki 3
  • Ahmad Fahmi 4
1 PhD Student in Civil Engineering, Faculty of Civil Engineering and Architecture, Malayer University, Malayer, Hamadan, Iran
2 Assistant Professor, Department of Civil Engineering, Faculty of Civil Engineering and Architecture, Malayer University, Malayer, Hamadan, Iran
3 Assistant Professor, Department of Mechanical Engineering, Faculty of Engineering, Bonab University, Bonab, East Azerbaijan, Iran
4 Department of Civil Engineering, Faculty of Engineering, University of Bonab, Iran
چکیده [English]

Today, the production of high-quality construction materials with low production costs is one of the needs of the construction industry. By using geopolymerization technology, it is possible to produce construction materials such as mortar, concrete, and geopolymer bricks with high mechanical strength and desirable quality. One of the aluminosilicate minerals that can be used to produce geopolymeric adhesive material is laterite. To improve the mechanical strength, durability, and physical characteristics of the geopolymer product, its reinforcement using different fibers such as glass fibers has been considered by various researchers. In the current research, using laboratory tests, the effect of reinforcing geopolymer mortar based on laterite powder using glass fibers was studied. The alkaline solution containing 6, 10, and 14 M sodium hydroxide was used to make samples of geopolymer mortar with laterite powder, without and containing glass fibers after 5 minutes of complete mixing, The samples were poured into 50 × 50 × 50 mm wooden molds and 40 × 40 × 160 mm prism molds and vibrated on a vibrating machine. After processing for 3 days in the greenhouse, the compressive and bending strength of the geopolymer samples as well as the water absorption percentage of the samples were measured. The results showed that the concentration of activating solution and glass fibers has a significant effect on the compressive and bending strength of geopolymer samples based on laterite powder with glass fibers. According to the obtained results, the increase in 3, 7, and 28 days compressive strength of geopolymer samples containing fibers varies between 10.9 and 47% compared to geopolymer samples without fibers. According to the results of this research, it is recommended to make geopolymer building materials based on laterite powder containing glass fibers with relatively high strength.

کلیدواژه‌ها [English]

  • Geopolymer mortar
  • Laterite powder
  • Glass fibers
  • Alkaline activator
  • Mechanical strength
  • water absorption percentage
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