بررسی تأثیر استفاده از PVC بر خرابی رطوبتی مخلوط آسفالت گرم

نوع مقاله : پژوهشی

نویسنده

دانشگاه گیلان

چکیده

خرابی رطوبتی در مخلوط‌های آسفالتی از دست دادن دوام و مقاومت ناشی از تأثیر رطوبت تعریف می‌شود. در این پژوهش، تأثیر استفاده از ماده پلیمری پلی‌وینیل‌کلراید به‌عنوان اصلاح‏کننده قیر بر خرابی رطوبتی مخلوط‏های آسفالتی بررسی شده است. آزمایش مقاومت کششی غیرمستقیم در شرایط خشک و 1، 3 و 5 سیکل یخ‑ذوب و روش ترمودینامیک بر اساس اندازه‏گیری اجزای انرژی آزاد سطحی سنگ‌دانه‌ها و قیرها برای بررسی تأثیر مواد پلیمری استفاده شده است. نتایج ارائه‌شده در این پژوهش نشان می‏دهد که استفاده از پلیمر پلی‏وینیل‏کلراید باعث افزایش مقاومت مخلوط آسفالتی در برابر خرابی رطوبتی شده است. همچنین، پلی‏وینیل‏کلراید مقدار انرژی آزاد پیوستگی را افزایش و انرژی جداشدگی را کاهش داده است که باعث کاهش نرخ خرابی رطوبتی مخلوط‏های آسفالتی می‏شود.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation the Effect of Polyvinyl Chloride on Moisture Sensitivity of HMA

نویسنده [English]

  • Gholam Hossein Hamedi
University of Guilan
چکیده [English]

Moisture damage is defined as loss of strength and durability of asphalt mixtures in the presence of water. In this study, the effect of Polyvinyl Chloride (PVC) polymer was evaluated as an asphalt binder modifier on the moisture damage of HMA. Indirect tensile test in dry and 1, 3 & 5 freeze-thaw conditions and thermodynamic method according to the measurements of surface free energy components of aggregates and asphalt binders were used for evaluating the effect of polymeric materials. The results of this study show that using of PVC cause an increase in the strength of the asphalt mixture against the moisture damage. Also, PVC increased the free energy of cohesion and reduced the debonding energy. These cause decreased in the rate of the moisture damage of asphalt mixtures.

کلیدواژه‌ها [English]

  • Hot mix asphalt
  • Moisture damage
  • Polyvinyl Chloride
  • Indirect tensile strength
  • Thermodynamic method
1. Moghadas Nejad, F., "Influence of using nonmaterial to reduce the moisture susceptibility of hot mix asphalt". Construction and Building Materials, 31: p. 384-388, (2012).
2. Little, D.N. and Jones, D., "Chemical and mechanical processes of moisture damage in hot-mix asphalt pavements". Transportation Research Board National Seminar, San Diego, CA, USA, (2003).
3. Hamedi, G.H., Moghadas Nejad, F.M., and Oveisi, K., "Estimating the moisture damage of asphalt mixture modified with nano zinc oxide". Materials and Structures, 49(4): p. 1165-1174, (2016).
4. Solaimanian, M., "Test methods to predict moisture sensitivity of hot-mix asphalt pavements". Transportation Research Board National Seminar. San Diego, California, (2003).
5. Hamedi, G.H. and Moghadas Nejad, F., "Using energy parameters based on the surface free energy concept to evaluate the moisture susceptibility of hot mix asphalt". Road Materials and Pavement Design, 16(2): p. 239-255, (2015).
6. Cheng, D., "Surface free energy of asphalt-aggregate system and performance analysis of asphalt concrete based on surface free energy". (2002).
7. Bond, A., Hefer, A., and Little, D., "Adhesion in Bitumen-aggregate Systems and Quantification of the effects of water on the adhesive bond", (2005).
8. Hamedi, G.H. and Moghadas Nejad. F., "Evaluating the effect of mix design and thermodynamic parameters on moisture sensitivity of HMA". Materials in Civil Engineering: p. In press, (2016).
9. Hamedi, G.H., "Moisture Damage of Asphalt Mixture Modeling Based on Surface Free Energy Theory", in Department of Civil & Environmental Engineering, Moisture Damage Modeling Based on Surface Free Energy Theory. p. 305, (2015).
10. Khodaii, A., "Evaluating the Effect of Zycosoil on Moisture Damage of Hot Mix Asphalt Using the Surface Energy Method". Journal of Materials in Civil Engineering, (2013).
11. Arabani, M. and Hamedi, G.H., "Using the surface free energy method to evaluate the effects of liquid antistrip additives on moisture sensitivity in hot mix asphalt". International Journal of Pavement Engineering, 15(1): p. 66-78, (2014).
12. Hamedi, G.H., "Evaluating the Effect of Asphalt Binder Modification Using Nanomaterials on the Moisture Damage of HMA". Road Materials and Pavement Design: p. In press, (2016).
13. Van Oss, C.J., Chaudhury, M.K., and Good, R.J., "Interfacial Lifshitz-van der Waals and polar interactions in macroscopic systems". Chemical Reviews, 88(6): p. 927-941, (1988).
14. Little, D.N., Bhasin, A., and Hefer, A., "Using surface energy measurements to select materials for asphalt pavement". Transportation Research Board, (2006).
15. Bhasin, A. and Little, D.N., "Characterization of aggregate surface energy using the universal sorption device". Journal of Materials in Civil Engineering. 19(8): p. 634-641, (2007).
16. Hefer, A.W., "Adhesion in bitumen-aggregate systems and quantification of the effects of water on the adhesive bond", Texas A&M University, (2004).
17. Hefer, A.W., Bhasin, A., and Little, D. N., "Bitumen surface energy characterization using a contact angle approach". Journal of Materials in Civil Engineering, 18(6): p. 759-767, (2006).
18. Mercado, E.A., "Influence of fundamental material properties and air void structure on moisture damage of asphalt mixes". Texas A&M University, (2007).
CAPTCHA Image