INFLUENCE OF CHEMICAL CATALYSTS AND SELECTED ADDITIVES ON BEHAVIOR OF CRUMB RUBBER MODIFIED BITUMEN
Last modified: 2017-02-28
catalysts suitable for temporary devulcanization of the rubber. Further for improving the homogeneity and storage stability of the CRMB additional additives have been tested and their effects compared. For the bitumen samples traditional as well as performance-based tests
have been done. Within the traditional test softening point, penetration and elastic recovery test should be stressed out. For performance-based testing dynamic shear rheometer has been used for running frequency sweeps for temperatures between 20 and 60°C. At the same time multiple stress creep recovery test has been done for test temperature of 60°C. Dynamic viscosity has been assessed as well. Paper summarizes gained findings and recommendations made for most suitable combinations of bitumen – CR content – catalyst and additive.