Analysis of aging mechanism of SBS polymer modified asphalt based on Fourier transform infrared spectrum

Abstract

The aging mechanism of SBS modified asphalt during its aging process was studied. The characterizations of base asphalt, SBS polymer and its modified asphalt were determined in different aging time by Fourier transform infrared spectrum (FTIR). FTIR shows that oxidative dehydrogenation reaction occurs in asphalt, and unsaturated carbon bond is generated under short-term thermal aging condition. Additionally, SBS polymer was aged significantly under that condition, the speed of which was faster than that of base asphalt. The aging laws of both asphalt and SBS polymer during the aging process of SBS modified asphalt were similar to their aging laws respectively. Due to the protective effect between asphalt and SBS polymer, the aging degrees of asphalt and SBS polymer were lower than those aged independently.

Keywords

SBS polymer modified asphalt / aging / FTIR

References

[1] Maria da Conceicao Cavalcante Lucena, Sandra de Aguiar Soares, Jorge Barbosa Soares. Characterization and Thermal Behavior of Polymer Modified Asphalt[J]. Materials Research, 2004: 529–534

[2] Qian C.-x., Xie J.-g., Wang H.-bo. Anti-aging Capability of SBS and SEBS Modified Asphalt and Mixture[J]. Journal of Southeast University (Natural Science Edition), 2005, 35(6): 945-949.

[3] Liang R. Y., Lee S. Short-term and Long-term aging Behavior of Rubber Modified Asphalt Paving Mixture[J]. Transportation Research Record, 1996, 1530: 11-17.

[4] Kandhal P. S., Chakraborty S. Effect of Asphalt film Thickness on Short-and Long-term Aging of Asphalt Paving Mixtures[J]. Transportation Research Record, 1996, 1535: 83-90.

[5] Bell C A, Wieder A J, Felin M J. Laboratory Aging of Asphalt T-aggregate Mixtures field Validation[J]. Transportation Research Board, 1994-4

[6] Zanzotto L., Stastna J., Vacin O. Thermomechanical properties of Several Modified Asphalts[J]. Appl. Rheol., 2000, 10: 124-44.

[7] Sengoz B., Isikyakar G. Evaluation of Properties and Microstructure of SBS and EVA Polymer Modified Bitumen[J]. Construction Building Material, 2007, 22: 1897-905.

[8] Lu X. Ulf Isacsson. Chemical and Rheological Evaluation of Aging Properties of SBS Polymer Modified Bitumens[J]. Fuel, 1998, 77: 961-972.

[9] M S Cortizo, D O Larsen, H Bianchetto, et al. Effect of the Thermal Degradation of SBS Copolymers During the Ageing of Modified Asphalts[J]. Polymer Degradation and Stability, 2004(86): 275–282

[10] Daranga C. Characterization of Aged Polymer Modified Cements for Recycling Purposes[D], 2005 USA Louisiana State University

[11] Diego O. Larsen, Jose Luis Alessandrini, Alejandra Bosch. Micro-structural and Rheological Characteristics of SBS-asphalt Blends during Their Manufacturing[J]. Construction and Materials,2009: 2769–2774

[12] Masson J.F., Pelletier L., Collins P. Rapid FTIR Method for Quantification of Styrene-butadiene Type Copolymers in Bitumen[J]. Appl. Polym. Sci., 2001, 79: 1034-41.

[13] Lu X., Isacsson U. Modification of Road Bitumens with Thermoplastic Polymers[J]. Polym. Testing, 2001, 20(1): 77-86.

[14] Wang S., Chang J., Tsiang R. Infrared Studies of Thermal Oxidative Degradation of Polystyrene-block-polybutadiene-Block-polystyrene Thermoplastic Elastomers[J]. Polymer Degradation and Stability, 1996, 52: 51-7.

[15] Peterson J.C. A dual, Sequential Mechanism for the Oxidation of Petroleum Asphalt[J]. Petroleum Sci. Technol., 1998, 16(9–10): 1023-1259.

[16] Ali M.F., Siddiqui M.N. Changes in Asphalt Chemistry and Durability During Oxidation and Polymer Modification[J]. Petroleum Sci. Technol., 2001, 19(9–10): 1229-1249.

[17] Mohamed Ali Dhalaan. Characterization and Design of Recycled Asphalt Concrete Mixture Using Indirect Tensile Test Methods[D]. The University of Texas at Austin, 1982

[18] He L. Y., Button J. W. Methods to Determine Polymer Content of Modified Asphalt[J]. Transportation Research Record, 1991, 1317: 23-31.