401. A Characterization of Occupational Exposures to Crumb Rubber Modified Asphalt and Conventional (Nonrubber Containing) Asphalt During Road Paving

1999 ◽  
Author(s):  
G. Burr ◽  
A. Miller
Keyword(s):  
Occupational Exposures ◽  
Crumb Rubber ◽  
Modified Asphalt ◽  
Road Paving

Microstructure and Temperature Characterization of Compound Crumb Rubber Modified Asphalt

2014 ◽  
Vol 1052 ◽  
pp. 382-386 ◽  
Author(s):  
Lan Wang ◽  
Jiang San Hu ◽  
Gang Chen
Keyword(s):  
Complex Modulus ◽  
Crumb Rubber ◽  
Dynamic Shear ◽  
Rotational Viscometer ◽  
Rubber Powder ◽  
Modified Asphalt ◽  
Rubber Particles ◽  
Powder Content ◽  
Rotary Viscometer

Compound Crumb Rubber Modified Asphalt (CCRMA) is a mixture of waste rubber tire powder, SBS modifier and asphalt in order to modify the characteristics of asphalt. The application of using crumb rubber powder in making CCRMA is important in improvement of working characteristics of asphalt as well as in pollution control and environment protection. CCRMA, crumb rubber particles, SBS modifier and base asphalt have been examined by Scanning Electron Microscope (SEM) to observe the microcosmic appearance and the characteristic distribution of crumb rubber particles and SBS modifier in asphalt. The rotary viscometer test and dynamic shear test of CCRMA were carried out by rotational viscometer and Dynamic Shear Rheology (DSR). The influences of rubber powder content and reaction time to viscosity of CCRMA have been studied. In the stage of current study, complex modulus and phase angle of CCRMA are parameters reflecting viscoelasticity, the relation between them and temperature are researched.

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