Effect of Crumb Rubber Modifiers (CRM) on Characteristics of Asphalt Binders in Sudan
International Journal of Materials Science and Applications
Volume 6, Issue 2-1, April 2017, Pages: 1-6
Received: Jan. 6, 2017;
Accepted: Jan. 20, 2017;
Published: Feb. 14, 2017
Views 2050 Downloads 60
Magdi Mohamed Eltayeb Zumrawi, Department of Civil Engineering, University of Khartoum, Khartoum, Sudan
The use of Crumb Rubber Modifiers (CRM) in flexible pavements to improve characteristics of asphalt binders has become a technique of great potential in recent years. In this regard an experimental program was undertaken to study the influence of CRM on the physical properties of asphalt binder. Asphalt cement modified with varying percentages of CRM, 0, 5, 10, 15, 20, and 30 percent were studied. Penetration, ductility, viscosity, softening point, flash and fire points, and specific gravity tests were performed on base and modified asphalts. The tests results show that addition of CRM to base asphalt has significant influence on its properties. Comparing the tests results, the viscosity, softening point, flash and fire points of the modified asphalts increased significantly, coupled with reduction in penetration and ductility as the CRM content increased. Addition of 15% CRM resulted in 200% and 15% increment in viscosity and softening point of base asphalt respectively, while the reduction in ductility and penetration were almost 75% and 25% respectively. It could be concluded that modification of asphalt binders by crumb rubber is successful and more beneficial technique.
Magdi Mohamed Eltayeb Zumrawi,
Effect of Crumb Rubber Modifiers (CRM) on Characteristics of Asphalt Binders in Sudan, International Journal of Materials Science and Applications. Special Issue:2D Materials and Van Der Waals Heterostructures.
Vol. 6, No. 2-1,
2017, pp. 1-6.
McDonald C. H., A New Patching Material for Pavement Failures, HRB, Highway Research Record 146, pp. 1-16. Construction Record 1t71 (1966), pp. 113-120.
Takallou H. B., and Hicks R. G., Development of Improved Mix and Construction Guidelines for Rubber-Modified Asphalt Pavements, TRB, Transportation Research Record 1t71 (1988), pp. 113-120.
Bahia H. U., Effect of Crumb Rubber Modifiers (CRM) on performance related properties of Asphalt Binders. Journal of Association of Asphalt Paving Technologists. Vol. 63, 1994, pp. 414-449.
Billiter et al., Production of Asphalt-Rubber Binders by High-Cure Conditions. In Transportation Research Record: Journal of the Transportation Research Board, No. 1586, Transportation Research Board of the National Academies, Washington, D. C., 1997, pp. 50-56.
Airey G., Singleton T. M., and Collop A., Properties of polymer modified bitumen after rubber-bitumen interaction. Journal of Materials in Civil Engineering, ASCE, Vol. 14, No. 4, (2002), pp. 344-354.
Bahia H. U., Davies R., Effect of crumb rubber modifiers (CRM) on performance- related properties of asphalt binders. J. Assoc. Asphalt Paving Technol., 63: (1994), pp. 414-441.
Katman H. Y., Ibrahim M. R., Karim M. R., Abdelaziz M., Resistance to disintegration of rubberised porous asphalt. Proc. Eastern Asia Soc. Trans. Stud., 7: (2009), pp. 286-297.
Abdelaziz M., Karim M. R., Rheological evaluation of ageing properties of rubber crumb modified bitumen. J. Eastern Asia Soc. Trans. Stud., 5: 820-833. October 2003, ISSN 1341-8521.
Fontes L., Triches G., Pais J. C., Pereira P., Evaluating permanent deformation in asphalt rubber mixtures. Constr. Build. Mater., 24: (2010), pp. 1193-1200.
Wong C. C., Wong W. G., Effect of crumb rubber modifiers on high temperature susceptibility wearing course mixtures. Constr Build. Mater., 21: (2007), pp. 1741–1745.
Thodesen C., Shatanawi K., Amirkhanian S., Effect of crumb rubber characteristics on crumb rubber modified (CRM) binder visc. Constr. Build. Mater., 23: (2009), pp. 295–303.
Liu S., Cao W., Fang J., Shang S., Variance analysis and performance evaluation of different crumb rubber modified (CRM) asphalt. Constr. Build. Mater., 23: (2009), pp. 2701-2708.
Lee S. J., Amirkhanian S., and Shatanawi K., Effects of crumb rubber on aging of asphalt binders Asphalt Rubber 2006, Vol. 3, pp.779-795, Palm Springs, California.
Liang R. Y., and Lee S., Short-term and long-term aging behavior of rubber modified asphalt paving mixtures. Transportation Research Record: Journal of the Transportation Research Board, No. 1530, (1996), pp.11-17.
Ruth B. E., and Roque R., Crumb Rubber Modifier (CRM) in asphalt pavements. Proceedings of the Transportation Congress, (1995). pp. 768-785.
Yetkin Y., Polymer modified asphalt binders. Constr Build Mater; 21: (2007), pp. 66–72.
Cao R., Chen R., Laboratory study on process parameters of asphalt rubber and their effects on performance. J Southeast Univ (Nat SciEdn); 38: (2008), pp. 269–273.
Bahia H. U., Hislop W. P., Zhai H., Rangel A., Classification of asphalt binder into simple and complex binder. J. Assoc. Asphalt Paving Technol., 67: (1998), pp. 1-41.
Paulo A. P., Jorge C. P., Laboratory optimization of continuous blend asphalt rubber. Proc. 3rd Eur. Pav. Asset. Manage., EPAM 3. Coimbra, 2008.
Abdelrahman M., Ghavibazoo A., Ragab M., Mechanism of Crumb Rubber Modifier Dissolution into Asphalt Matrix and Its Effect on Final Physical Properties. Transportation Research Record Journal of the Transportation Research Board, (2013), Paper No. 13-4259
Jeong K. D., Lee S. J., Amirkhanian S. N., Kim K. W., Interaction of crumb rubber modified asphalt binder. Const. Build. Mater., 24: (2010), pp. 824-831.
Airey G. D., Rahman M. M., Collop A. C., Absorption of bitumen into crumb rubber using the basket drainage method. Int. J. Pav. Eng., 4(2): (2003), pp. 105-119.
Shen J., Amirkhanian S. N., The influence of crumb rubber modifier (CRM) microst on the high temp. properties CRM binder. Int. J. Pav. Eng., 6(4): (2005), pp. 265-271.