Modification of bitumen with desulfurized crumb rubber in the present of reactive additives

Abstract

Bitumen was modified with desulfurized crumb rubber (DCR) in the present of reactive additives. The effect of the kinds and content of the reactive additive on properties of DCR modified bitumen (DCRMB) was investigated. The morphology of DCRMB was characterized by SEM and the changes of the chemical structure of DCRMB without and with the addition of the reactive additive were analyzed by FTIR. The experimented results show that the softening point, the elasticity recovery and the storage stability of DCRMB were improved significantly by the addition of the reactive additive. This is because that a network structure of rubber in DCRMB was formed and the chemical reaction between C=C double bonds in bitumen and DCR has happened after the reactive additive was added into DCRMB.

Keywords

crumb rubber / bitumen / desulfuration / modification

References

[1] Jiabin Yan. The Use of Waste Tire and Production and Application of Reclaimed Rubber. The World Rubber Industry, 1999, 26(1): 44-48.

[2] Hossain M, Swartz S, Hoque E. Fracture and Tensile Characteristics of Asphalt-rubber Concrete. Journal of Materials in Civil Engineering, 1999, 11: 287-294.

[3] Weimin Lu. Characteristic and Application of Rubber Bitumen. Petroleum Processing, 1992, 6: 10-13.

[4] Lougheed T J, Papaginannakis A T. Viscosity characteristics of Rubber-modified Asphalts. Journal of Materials in Civil Engineering, 1996, 8: 153-156.

[5] Zhigang Ye, Xianming Kong, Jianying Yu, . Investigation on Crumb Rubber Modified Asphalt. Journal of Wuhan University of Technology, 2003, 25(1): 11-14.

[6] Mull M A, Stuart K, Yehia A. Fracture Resistance Characterization of Chemically Modified Crumb Rubber Asphalt Pavement. Journal of Materials Science, 2002, 37: 557-566.

[7] Zhigang Ye, Xianming Kong, Jianying Yu. Investigation on Microstructure and Properties of Desulfurized Crumb Rubber Modified Bitumen. Journal of Wuhan University of Technology —Mater. Sci. Ed., 2003, 18(1): 83-85.

[8] Xiaohu Lu, Ulf Isacsson. Articial Aging of Polymer Modified Bitumens. Journal of Applied Polymer Science, 2000, 76(12): 1811-1824.