مهندسی سازه و ساخت

مهندسی سازه و ساخت

مطالعه مروری خواص مکانیکی و دوامی مخلوط های بر پایه اکسید منیزیم جهت پیشبرد سیستم های کم کربن در صنعت ساخت و ساز

نوع مقاله : علمی - پژوهشی

نویسندگان
1 دانشجوی‌کارشناسی ارشد، دانشکده معماری و شهرسازی، دانشگاه شهید‌بهشتی، تهران، ایران.
2 استادیار، دانشکده مهندسی عمران، آب و محیط‌زیست، دانشگاه شهید بهشتی، تهران، ایران.
3 دانشیار، دانشکده معماری و شهرسازی، دانشگاه شهید بهشتی تهران، ایران.
4 دکتری، دانشکده مهندسی عمران، آب و محیط‌زیست، دانشگاه شهید بهشتی، تهران، ایران.
چکیده
سیمان یکی از پرکاربردترین مصالح ساختمانی است که فرآیند تولید آن به انتشار دی‌اکسید کربن منجر می‌گردد. این انتشار ناشی از تجزیه کربنات کلسیم در دماهای بالا (حدود 1450 درجه سانتی‌گراد) است که نقش بسزایی در تولید گازهای گلخانه‌ای ناشی از صنعت ساخت‌وساز دارد. لذا اخیرا به‌منظور کاهش ردپای کربن و توسعه مصالح پایدار، استفاده از اکسید منیزیم (MgO) به‌عنوان جایگزینی با پتانسیل بالا از سوی محققین مطرح شده است. این ماده با جذب دی‌اکسید کربن، تشکیل محصولات هیدراتاسیون، کربناته پایدار و کاهش دمای کلسیناسیون، توانسته توجه محققان مهندسی عمران را به خود جلب کند. در این مطالعه مروری، روش‌های تولید اکسید منیزیم و کاربردهای آن و همچنین تأثیر MgO بر خواص مکانیکی و دوام مخلوط‌های سیمانی مورد بررسی قرار گرفته است. همچنین، این مقاله با تحلیل نتایج پژوهش‌های انجام‌شده، چالش‌ها و فرصت‌های استفاده از MgO را شناسایی کرده و راهکارهایی برای بهبود طراحی مخلوط‌های سیمانی مبتنی بر MgO ارائه می‌دهد. یافته‌ها نشان می‌دهد که استفاده از MgO، به‌ویژه در مقادیر بهینه، می‌تواند بهبود قابل‌توجهی در خواص مکانیکی و دوام مواد سیمانی ایجاد کند. بااین‌حال، مقادیر بالای MgO و واکنش‌پذیری ناکافی آن می‌تواند موجب افزایش تخلخل و کاهش مقاومت مکانیکی شود. از سوی دیگر، عمل‌آوری مناسب و تنظیم شرایط رطوبتی و حرارتی نقش مهمی در بهینه‌سازی عملکرد این مواد ایفا می‌کند. علاوه بر این، یافته‌ها نشان می‌دهد که بهره‌گیری از این مواد می‌تواند گامی مؤثر در جهت توسعه مصالح ساختمانی کم‌کربن و دستیابی به اهداف زیست‌محیطی در صنعت ساخت‌وساز به شمار آید.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

A review study on the mechanical and durability properties of magnesium oxide-based mixtures for advancing low-carbon systems in the construction industry.

نویسندگان English

zeinab abdoos 1
Kianoosh Samimi 2
Mohammad Reza Hafezi 3
Mahyar Pakan 4
1 Masters student, Faculty of Architecture and Urban planning, Shahid Beheshti University, Tehran, Iran.
2 Assistant Professor, Faculty of Civil, Water and Environmental Engineering, Shahid Beheshti University, Tehran, Iran.
3 Associate Professor, Faculty of Architecture and Urban planning, Shahid Beheshti University, Tehran, Iran.
4 Ph.D., Faculty of Civil Engineering, Water, and Environmental Engineering, Shahid Beheshti University, Tehran, Iran.
چکیده English

Cement is one of the most widely used construction materials, and its production process leads to the emission of carbon dioxide. This emission results from the decomposition of calcium carbonate at high temperatures (around 1450°C), which significantly contributes to the production of greenhouse gases in the construction industry. Therefore, to reduce the carbon footprint and promote the development of sustainable materials, the use of magnesium oxide (MgO) as a high-potential alternative has been proposed by researchers. This material, by absorbing carbon dioxide, forming stable carbonate hydration products, and reducing calcination temperatures, has attracted the attention of civil engineering researchers. In this review study, the methods of producing magnesium oxide, its applications, and the impact of MgO on the mechanical properties and durability of cementitious mixtures are examined. Additionally, this paper identifies the challenges and opportunities of using MgO by analyzing the results of conducted studies and proposes solutions for improving the design of MgO-based cementitious mixtures. The findings indicate that the use of MgO, especially at optimal levels, can lead to significant improvements in the mechanical properties and durability of cementitious materials. However, high amounts of MgO and its insufficient reactivity can increase porosity and reduce mechanical strength. On the other hand, proper curing and adjustment of moisture and temperature conditions play an important role in optimizing the performance of these materials. Furthermore, the findings suggest that the utilization of these materials can be an effective step toward the development of low-carbon building materials and achieving environmental goals in the construction industry.

کلیدواژه‌ها English

Magnesium oxide
Concrete
Mechanical properties
Durability
Cement
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  • تاریخ دریافت 05 اسفند 1403
  • تاریخ بازنگری 11 اردیبهشت 1404
  • تاریخ پذیرش 14 خرداد 1404