Effect of Mineral pitch and Zycosil Nano-Material on Mechanical Properties and Moisture Susceptibility of Asphalt Mixtures

Document Type : Original Article


Department of Civil Engineering, Urmia University, Urmia, Iran.


The performance of asphalt pavements against environmental factors such as moisture is important. Many failures are caused by the direct flow of water into the pavement and the weakening of the bond between bitumen and aggregates. Therefore, the purpose of this study was to investigate the effect of anti-stripping nano-materials and Iranian Gilsonite on the moisture susceptibility of asphalt mixtures, and in this research, hot-mix asphalt is investigated. To achieve this goal, the calcined aggregates, bitumen 60-70, and two additives of mineral pitch and Zycosil are used. The mineral pitch was mixed with bitumen at 3, 6 and 9% levels by weight of bitumen and Zycosil was mixed at 0.15% by weight of bitumen for each asphalt specimen. The level of bitumen used in samples is considered to be the same with the optimum bitumen of the control sample. Then, the diagrams of tests conducted on the samples were plotted. These tests, which were used to study the effect of these materials on the adhesion and strength of asphalt mixtures, include indirect tensile test, resilient modulus and Marshall stability. The results from the experiments show that the mineral pitch and Zycosil improve the performance of hot-mix asphalt.


Main Subjects

  1. Yildirim Y. Polymer modified asphalt binders. Construction and Building Materials. 2007;21(1):66-72.
  1. Kringos N, Scarpas A. Physical and mechanical moisture susceptibility of asphaltic mixtures.   International   Journal   of   Solids   and   Structures. 2008;45(9):2671-85.
  2. Grenfell J, Ahmad N, Liu Y, Apeagyei A, Large D, Airey G. Assessing asphalt mixture moisture susceptibility through intrinsic adhesion, bitumen stripping and mechanical damage. Road Materials and Pavement Design.2014;15(1):131-52.
  3. Esarwi AM, Hainin MR, Chik AA, editors. Stripping resistance of malaysian hot mix asphalt mixture using hydrated lime as filler. EASTS International Symposium on Sustainable Transportation incorporating Malaysian Universities Transport Research Forum Conference, Malaysia; 2008.
  4. Hunter ER, Ksaibati K. Evaluating moisture susceptibility of asphalt mixes: Mountain-Plains Consortium Fargo, ND; 2002.
  5. Tayebali AA, Fischer WK, Huang Y, Kulkarni M. Effect of percentage baghouse fines on the amount and type of anti-stripping agent required to control moisture sensitivity. 2003.
  6. Kim Y-R, Pinto I, Park S-W. Experimental evaluation of anti-stripping additives in bituminous mixtures through multiple scale laboratory test results. Construction and Building Materials. 2012;29:386-93.
  7. Mallick RB, Gould JS, Bhattacharjee S, Regimand A, James LH, Brown ER. Development of a rational procedure for evaluation of moisture susceptibility of asphalt paving mixes. Transportation Research Board, Washington, DC. 2003.
  8. Solaimanian M, Harvey J, Tahmoressi M, Tandon V, editors. Test methods to predict moisture sensitivity of hot-mix asphalt pavements. Moisture Sensitivity of Asphalt Pavements-A National SeminarCalifornia Department of Transportation; Federal Highway Administration; National Asphalt Pavement Association; California Asphalt Pavement Alliance; and Transportation Research Board; 2003.
  9. ASTM D. 1559 (1989)“Test method for resistance of plastic flow of bituminous mixtures using Marshall apparatus”. American Society for Testing and Materials, Philadelphia, USA. 1989.
  10. Astm D.  4123.  Standard  Test  Method  for  Indirect  Tension  Test  for Resilient Modulus of Bituminous Mixtures,” ASTM International. 1995.