عنوان مقاله [English]
Bitumen as a really important material road construction shows very attractive properties. Modification of bitumen by polymers increases the service life of the asphalt pavement. In order to improve the engineering properties of bitumen, both chemical and physical methods have been used which the physical methods, because of their simplicity, are more commonly employed. In physical modification, some materials such as polymers, are usually used. Polysulfide is one of the polymers that has recently attracted the interest of industries. It is interesting that this polymer which is made of heavy chlorinated petrochemical was tested to reduce the costs which are associated with bitumen modification as well as helping to alleviate the problem of waste accumulation. In this investigation, a polysulfide polymer derived from waste (waste liquid polysulfide polymer, WLPSP), in pure form and in combination with nanoclay was used to modify bitumen. The amounts of polymer added to the bitumen were 1, 3 and 5 weight percents. In the samples modified with both polymer and nanoclay, the amount of nanoclay was fixed at 2 wt%. The WLPSP polymer not only increased the softening point but also reduced the penetration of bitumen, resulting in improvement of the properties of bitumen at high temperatures. These effects could be observed for all samples of bitumen-polymer-clay and bitumen-nanoclay blends. The bitumen modified with nanoclay-polymer and nanoclay alone showed a further reduction in penetration upon WLPSP modification. The penetration index (PI) of bitumen increased, indicating a lower thermal sensitivity of modified bitumen.
Yousefi A.A., Modified Bitumens, The Second Training Course of Bitumen and Modified Bitumen,Tehran, Iran, 2004.
Fakhri M., The Use of Polymers in Improving Properties of Bitumen and Asphalt Mixtures, Ministry of Road and Urban Development, Department of Education, Research and Technology Transportation Research Institute, 2007.
The Use of Polymer in Bitumen and Asphalt Mixtures Properties, Technical and Soil Mechanics Laboratory Corporation, Ministry of Transportation, 2006.
Yazdi Aznave H., Shirkavand Hadavand B., and Fakhri M., Assessment of PSP Polymer on the Physical and Mechanical Properties of Bitumen, MSc Thesis, Department of Civil Engineering, Khaje Nasreddin Tusi University, 2011.
Sadraldini Mehrjerdi M., Modification of Properties of Bitumen and Increase Its Efficiency by the Polymer and Rubber Powder, Seventh Conference of Civil Student, Islamic Azad University of Kashan, Iran, 2001.
Rezaeian I., Mohammadi A.M., and Ivani J., Study of Curing Manganese Dioxide on the Properties of Liquid Polysulfide Polymer Mixtures, College Eng., 39, 129-135, 2005.
Matsui T. and Miwa Y., Detection of a New Crosslinking and Properties of Liquid Polysulfide Polymer J. Appl. Polym. Sci., 71, 59-66, 1998.
Rezaeian I., Zahedi P., Rezaeian A., Ghadiri M., Mohammadzadeh Honarvar F., and Mohammadi A.H., Optimized Formulation of an Oxidative Curing System for Liquid Polysulfide Sealants Used in Fuel Tanks by D-Optimal Design Method, J. Appl. Polym. Sci., 120, 2550-2565, 2011.
Shirkavand Hadavand B., Fakhri M., and Yazdi Aznaveh H., Modification of Asphalt Pavement with Polysulfide Polymer, Iran. J. Polym. Sci. Technol., (Persian) 24, 241-249, 2011.
Yazdi Aznaveh H., Shirkavand Hadavand B., and Fakhri M., Comparing the Effect of Polysulfide Polymer and Polysulfide Polymer Synthesized from Waste on Physical and Mechanical Properties of Bituminous Blends , J. Color Sci. Technol., 5, 137-144, 2011.
Ghaffarpour Jahromi S., Mortazavi M., Vosogh S.H., and Ahmadi N.A., Clay Impact on the Behavior of Fatigue and Permanent Deformation of Asphalt, J. Transportation Eng., 11, 51-65, 2009.
You Z., Mills-Beale J., Foley M.J., Roy S., Odegard G.M., Dai Q., and Wei Goh S., Nanoclay-Modified Asphalt Materials: Preparation and Characterization, Construct Build. Mater., 25, 1072-1078, 2011.
Yao H., You Z., Li L., Wei Goh S., Huei Lee C.H., Khin Yap Y., and Shi X., Rheological Properties and Chemical Analysis of Nanoclay and Carbon Microfiber Modified Asphalt with Fourier Transform Infrared Spectroscopy, Construct. Build. Mater., 38, 327-237, 2013.
Ramezani F. and Jalali Arani A., Effect of Nanoclay Presence on High Temperature Rheological Behavior of Crumb Rubber-Modified Bitumen, Proceedings of the 4th International Conference on Nanostructures (ICNS4), Kish Island, Iran, 12-14 March, 2012.
Asgar F., The Synthesis of Poly-sulphides Based Liquid Copolymer Ethylene Dichloride Waste and Supplying Sealant with Clay, MSc Thesis, Islamic Azad University, North Tehran Branch, Tehran, Iran, 2014.
Sahebi Z., Bitumen Produced by Mixing Bitumen and Petroleum Vacuum Residue, MSc Thesis. Polymer Group. Islamic Azad University, North Tehran Branch, 2004.
Kavussi A. and Abdi A., Evaluation of Stripping in Asphalt Pavements Using Abrasion Test, Modares Civil Eng. J., 10, 123-133, 2010
Ghaffarpour Jahromi S., Mortazavi M.R., Vossough S., and Ahmadi N., Effect of Nanoclay Modification on Fatigue and Permanent Deformation of Bituminous Binder, J. Transport. Eng., 1, 51-64, 2010.
Yousefi. A.A. Rotational Rheometers and Their Applications, Iran. J. Polym. Sci. Technol. (Persian), 4, 83-92, 2001.
Yousefi. A.A., Bitumen Modification Using Wastes of NMP and SBR Plants of BIPC, Report of Project No. 31713103, Iran Polymer and Petrochemical Institute, 2007.
Yousefi.A. Production Polymer-Modified Bitumen Fromvacuum Bottom, PE, SBR and NMP Wastes, MSc Thesis, Department Chemical Engineering, Islamic Azad University, South of Tehran Branch, 2008.