بررسی خواص مکانیکی و دوام یخ زدگی بتن رنگی زرد با نسبت‌های مختلف وزنی پیگمنت گِل ماش (لیمونیت)

نوع مقاله : علمی - پژوهشی

نویسندگان

1 مربی، دانشکده مهندسی عمران، ، دانشگاه فنی و حرفه ای، تهران، ایران

2 استادیار، دانشکده مهندسی عمران، دانشگاه آزاد اسلامی واحد فیروزآباد مرکز میمند، میمند، ایران

3 استادیار، گروه مهندسی عمران، دانشگاه آزاد اسلامی واحد سپیدان، فارس، ایران

4 مربی، گروه مهندسی عمران، دانشگاه فنی و حرفه‌ای، تهران، ایران

چکیده

بکارگیری طیف‌های رنگی در فضای شهری را می‌توان در نمای ساختمان‌ها، کفسازی، مبلمان شهری، پیاده‌روها و خیابان دید. استفاده از بتن رنگی جهت اجرای نماسازی و طراحی دکوراسیون به دلایل بسیاری می‌تواند مورد استقبال قرار گیرد. همچنین این روش باعث می‌شود نیازی به استفاده از مصالح دیگر برای پوشش کار نباشد که در اینصورت هزینه‌های نماکاری به ‌صورت چشمگیر کاهش می‌یابد. اما تغییرات دمایی و چرخه ذوب و انجماد در شرایط محیطی ناپایدار یکی از عوامل خرابی بتن است. بنابراین بتن رنگی علاوه بر زیبایی باید در برابر شرایط محیطی و جوی مختلف مقاوم باشد. رنگ زرد یکی از سه رنگ اصلی در چرخه رنگ است. در معماری، رنگ زرد رنگی کاربردی است و به دلیل نور زیادی که منعکس می‌کند فضاها را روشن و بزرگ جلوه می‌دهد. پیگمنت گل ماش یا همان لیمونیت نوعی خاک معدنی است که دارای مقدار زیادی اکسید آهن می‌باشد. این پیگمنت به رنگ‌های زرد مات یا خردلی یافت می‌شود. در این تحقیق برای تغییر رنگ بتن به زرد، از سیمان سفید و پیگمنت لیمونیت در نسبت‌های مختلف وزنی 5%، 10%، 15% و 20% در بتن استفاده گردید. در ادامه برای بررسی رفتار و دوام بتن آزمایش‌های مقاومت فشاری، جذب آب در بتن سخت شده و دوام ذوب و انجماد مورد بررسی قرار گرفت. نتایج این تحقیق نشان داد که میزان رنگ پذیری 5% و 10% لیمونیت در بتن باعث ایجاد رنگ نخودی و کرمی و استفاده از 15% و 20% باعث ایجاد رنگ زرد خواهد شد. همچنین استفاده از 10% لیمونیت در بتن مقاومت فشاری 28 روزه را تا 8% افزایش داد. اما بدلیل جذب آب بالای لیمونیت، دوام یخ زدگی آن در مقایسه با نمونه شاهد کاهش یافت.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigating The Mechanical Properties And Freezing Durability Of Yellow Colored Concrete With Different Weight Ratios Of Mush Clay Pigment (Limonite)

نویسندگان [English]

  • amirhossein bazaee 1
  • Babak Mansoori 2
  • roozbeh aghamajidi 3
  • Mahmoudreza Golshan 4
1 Instructor, Faculty of Civil Engineering, Technical and Vocational University (TVU), Tehran, Iran
2 Assistant Professor, Faculty of Civil Engineering, Islamic Azad University, Firoozabad Branch, Meymand Center, Meymand, Iran
3 Assistant Professor, Department Of Civil Engineering, Islamic Azad University, Sepidan Branch, Fars, Iran.
4 Instructor, Department Of Civil Engineering, Faculty Of Engineering, Technical And Vocational University (TVU), Tehran, Iran.
چکیده [English]

The Use Of Color Spectrums In The Urban Space Can Be Seen In The Facades Of Buildings, Flooring, Urban Furniture, Sidewalks And Streets. The Use Of Colored Concrete For Facade Construction And Decoration Design Can Be Welcomed For Many Reasons. Also, This Method Does Not Require The Use Of Other Materials To Cover The Work, In Which Case The Costs Of Facade Work Will Be Significantly Reduced. But Temperature Changes And The Cycle Of Melting And Freezing In Unstable Environmental Conditions Is One Of The Factors Of Concrete Failure. Therefore, In Addition To Beauty, Colored Concrete Must Be Resistant To Different Environmental And Atmospheric Conditions. Yellow Is One Of The Three Main Colors In The Color Wheel. In Architecture, Yellow Is A Practical Color And It Makes Spaces Appear Bright And Large Due To The Large Amount Of Light It Reflects. The Pigment Of Mung Bean Or Limonite Is A Type Of Mineral Soil That Has A Large Amount Of Iron Oxide. This Pigment Is Found In Dull Yellow Or Mustard Colors. In This Research, To Change The Color Of Concrete To Yellow, White Cement And Limonite Pigment Were Used In Different Weight Ratios Of 5%, 10%, 15% And 20% In Concrete. Further, To Check The Behavior And Durability Of Concrete, Compressive Strength Tests, Water Absorption In Hardened Concrete, And Durability Of Melting And Freezing Were Investigated. The Results Of This Research Showed That The Colorability Of 5% And 10% Limonite In Concrete Will Cause Pea And Cream Color And The Use Of 15% And 20% Will Cause Yellow Color. Also, The Use Of 10% Limonite In Concrete Increased The 28-Day Compressive Strength By 8%. But Due To The High Water Absorption Of Limonite, Its Freezing Durability Decreased Compared To The Control Sample.

کلیدواژه‌ها [English]

  • Colored Concrete
  • Yellow Concrete
  • Limonite
  • Mash Clay Pigment
  • Concrete Facade

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  • تاریخ دریافت: 20 آبان 1401
  • تاریخ بازنگری: 30 دی 1401
  • تاریخ پذیرش: 16 بهمن 1401

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