ارزیابی آزمایشگاهی تأثیر افزودنی نیمه‌گرم زئولیت طبیعی بر حساسیت رطوبتی مخلوط آسفالتی با رویکرد زیست محیطی

نویسنده

گروه ارزیابی و آمایش سرزمین، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران

چکیده

در چند دهه گذشته، مخلوط آسفالت نیمه گرم۱ به عنوان یک فناوری پیشرفته جایگزین برای آسفالت مخلوط گرم ۲ به دلیل دماهای نسبتاً پایین مورد نیاز برای گرم کردن آسفالت در فرآیند تولید و اجرا، کاهش آسیب محیطی را در حالی که مزایای آسفالت مخلوط گرم را حفظ می‌کند، به چشم می‌خورد. با این حال، دماهای پایین تولید و اجرا ممکن است منجر به خرابی آسفالت در برابر رطوبت شود. هدف این مطالعه ارزیابی ویژگی‌های آسفالت حاوی زئولیت طبیعی و مقایسه آن با زئولیت مصنوعی و افزودنی‌های آلی و شیمیایی مخلوط آسفالت نیمه گرم در مقابل خرابی در برابر رطوبت بود. خواص مقاومتی  نمونه‌ها در برابر حساسیت رطوبتی با استفاده از آزمایش عریان شدگی نیکلسون و آزمایش لاتمن اصلاح شده ارزیابی شدند.

کلیدواژه‌ها


-AASHTO T 283 – 07. (2011). Standard method of test for resistance of compacted asphalt mixtures to moisture-ınduced damage. Capital St., Washington, DC: American Association of State and Highway Transportation Officials.
-ASTM C1252 – 06. (2006). Standard test methods for uncompacted void content of fine aggregate (as influ- enced by particle shape, surface texture, and grading). West Conshohocken, PA: American Society for Testing and Materials.
-ASTM C127 – 07. (2007). Standard test method for density, relative density (specific gravity), and absorption of coarse aggregate. West Conshohocken, PA: American Society for Testing and Materials.
-ASTM C128 – 12. (2012). Standard test method for density, relative density (specific gravity), and absorption of fine aggregate. West Conshohocken, PA: American Society for Testing and Materials.
-ASTM C131 – 06. (2006). Standard test method for resistance to degradation of small-size coarse aggregate by abrasion and impact in the Los Angeles machine. West Conshohocken, PA: American Society for Testing and Materials.
-ASTM C136– 06. (2006). Standard test method for sieve analysis of fine and coarse aggregates. West Conshohocken, PA: American Society for Testing and Materials.
-ASTM C88 – 05. (2005). Soundness of aggregates by use of sodium sulfate or magnesium sulfate. West Conshohocken, PA: American Society for Testing and Materials.
-ASTM D113 – 07. (2008). Standard Test method for ductility of bituminous materials. West Conshohocken, PA: American Society for Testing and Materials.
-ASTM D1664 – 80.F. (1985). Standard test method for Coating and stripping of bitumen-aggregate mixtures. West Conshohocken, PA: American Society for Testing and Materials.
-ASTM D1754M – 09. (2009). Standard test method for effects of heat and air on asphaltic materials (thin-film oven test). West Conshohocken, PA: American Society for Testing and Materials.
-ASTM D36 – 95. (2000). Test method for softening point of bitumen (ring-and-ball apparatus). West Conshohocken, PA: American Society for Testing and Materials.
-ASTM D4402/D4402M – 12. (2012). Standard test method for viscosity determination of asphalt at elevated temperatures using a rotational viscometer. West Conshohocken, PA: American Society for Testing and Materials.
-ASTM D4791 – 10. (2010). Standard test method for flat particles, elongated particles, or flat and elongated particles in coarse aggregate. West Conshohocken, PA: American Society for Testing and Materials.
-ASTM D5 – 06. (2006). Standard test method for penetration of bituminous materials. West Conshohocken, PA: American Society for Testing and Materials.
-Clinoptilolite. (1997). The mineral and locality database. Retrieved from http://www.mindat.org/min-1082. html
Fromm, H. J. (1974). Mechanism of asphalt stripping from aggregate surfaces. AAPT, 43, 191–223. General Directorate of Highways. (2006). Highway technical specifications, earth work, infrastructure, tunnel, bridges (Publication of the General Directorate of Highways, 267). Ankara, Turkey (in Turkish).
-Grace, W. R. (2010). Zeolite structure, Web Site of Grace Co. Retrieved from http://www.grace.com/Enginee  red Materials/MaterialSciences/Zeolites/ZeoliteStructure.aspx
-Kandal, P. S., Lubold, C. W., & Roberts, F. L. (1989). Water damage to asphalt overlays: Case histories. AAPT, 58, 40–76.
-Kvasnak, A., West, R., Moore, J., Nelson, J., Turner, P., & Tran, N. (2009). Case study of warm mix asphalt moisture susceptibility in Birmingham. Transportation Research Board 88th Annual Meeting Compendium of Papers, Washington, DC.
-Porter, A. (2011). Sensitivity of warm mix asphalt to temperature, binder content, and laboratory stripping performance. Master’s Thesis in University of Arkansas. UMI Dissertation Publishing, Ann Arbor, Michigan, UMI Number:1501581.
Sengoz, B., & Isikyakar, G. (2008). Analysis of styrene-butadiene-styrene polymer modified bitumen using fluorescent microscopy and conventional test methods. Journal of Hazardous Materials, 150(2), 424–432.
-Stuart, K. D. (1990). Moisture damage in asphalt mixtures: A state of art report. Research Development and Technology, Turner-Fairbank Highway Research Center.
-Taylor, M. A., & Khosla, N. P. (1983). Stripping of asphalt pavements: State of the art. Transportation Research Record, 911, 150–8.
-Terrel, R. L., & Al-Swailmi, S. (1994). Water sensitivity of asphalt–aggregate mixes: Test selection (SHRP Report No. A-403). Strategic Highway Research Program, National Research Council.
Thomas, K. P., McKay, J. F., & Branthaver, J. F. (2006). Surfactants in aged asphalt and impact on moisture susceptibility of laboratory-prepared mixes. Road Materials and Pavement Design, 7, 477–490.
-Xiao, F., Zhao, W., Gandhi, T., & Amirkhanian, S. N. (2010). Influence of antistripping additives on moisture susceptibility of warm mix asphalt mixtures. Journal of Materials in Civil Engineering, 22, 1047–1055.