مصالح و سازه های بتنی

مصالح و سازه های بتنی

بررسی دوام و ساخت بتن رنگی قرمز با نسبت‌های مختلف وزنی پودر اُخرا و سیمان سفید در برابر چرخه انجماد

نوع مقاله : مقاله پژوهشی

نویسندگان
1 کارشناس ارشد، دانشکده مهندسی عمران، دانشگاه آزاد اسلامی واحد شیراز، فارس، ایران
2 کارشناس ارشد، دانشکده مهندسی عمران، دانشگاه آزاد اسلامی واحد سپیدان، فارس، ایران
3 استادیار گروه مهندسی عمران،واحد فیروزاباد، مرکز میمند،دانشگاه آزاد اسلامی،میمند ایران
چکیده
رنگ در معماری و شهرسازی جایگاه ویژه‌ای دارد. بکارگیری طیف‌های رنگی در فضای شهری را می‌توان در نمای ساختمان‌ها، کفسازی، مبلمان شهری و خیابان دید. بتن رنگی علاوه بر زیبایی و کیفیت رنگ‌پذیری باید در برابر شرایط محیطی و جوی مختلف مقاوم باشد. اُخرا نوعی خاک معدنی است که دارای مقدار زیادی اکسید آهن می‌باشد و به رنگ‌های قرمز تا قهوه‌ای یافت می‌شود. در این تحقیق برای تغییر رنگ بتن، از سیمان سفید و پودر اُخرا در نسبت‌های مختلف وزنی 5/2%، 5%، 5/7% و 10% استفاده شد. در ادامه برای بررسی رفتار و دوام بتن آزمایش‌های مقاومت فشاری، مقاومت کششی و دوام ذوب و انجماد مورد بررسی قرار گرفت. نتایج این تحقیق نشان داد که اُخرا خاصیت رنگ دهی بسیار بالایی دارد و افزودن حداقل 5% آن به جای سیمان، رنگ بتن را کاملاً تغییر می‌دهد. نتایج دوام یخ زدگی نمونه‌ها نشان داد که استفاده از اُخرا باعث زوال یا خرابی زودرس بتن در برابر انجماد نخواهد شد.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Investigating the Durability and Construction of Red Colored Concrete With Different Weight Ratios of Okhra Powder and White Cement Against the Freezing Cycle

نویسندگان English

masoud ghahramani 1
alimohamad sazegar 2
Babak Mansoori 3
1 Master's student in Civil Engineering, Islamic Azad University, Shiraz Branch, Fars, Iran
2 Master's student in Civil Engineering, Islamic Azad University, Sepidan Branch, Fars, Iran
3 Assistant Professor, Department of Civil Engineering, Firoozabad Branch, Meymand center, Islamic Azad University, Meymand,
چکیده English

Color is very important in architecture and urban planning. You can see the use of different colors in urban planning such as building facades, streets, sidewalks. In addition to beauty and color quality, colored concrete must be resistant to adverse weather conditions. Okhra is a type of mineral soil that has a large amount of iron oxide and is available in red to brown colors. In this research, to change the color of concrete, white cement and okhra powder were used in different weight ratios of 2.5%, 5%, 7.5% and 10%. Then, to check the strength and durability of concrete, tests of compressive strength, tensile strength and freezing durability of concrete were measured. The results of this research showed that okhra has a very high coloring property and adding at least 5% of it            replacing cement completely changes the color of concrete. In the following, the 90-day compressive strength of samples with 2.5%, 5%, 7.5% and 10% ocher increased by 5.9%, 11.5%, 15.6%, and 18.5%, respectively. The results of the freezing test of the samples showed that the use of okhra will not damage the concrete against freezing.

کلیدواژه‌ها English

Colored Concrete
Frost Resistance
Okhra Powder
Red Concrete
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  • تاریخ دریافت 13 بهمن 1402
  • تاریخ بازنگری 03 تیر 1403
  • تاریخ پذیرش 19 تیر 1403