A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Construction of Test Road to Evaluate Engineering Properties of Polymer-Modified Asphalt Binders
As polymers are being increasingly used for modification to enhance the properties of asphalt pavements, ASTM published its first specification for polymer-modified asphalts (PMA) in 1996. This paper reported the results of evaluating the ASTM specification of PMA mixed with styrene-butadiene-stvrene (SBS) copolymers. A 4-km in-service test road was constructed in this study to monitor the performance of asphalt pavements made of two straight and two PMA binders. The rheological properties of straight and PMA binders are discussed. Laboratory and field test results indicated that blending SBS with straight asphalt brought a range of performance benefits including higher elasticity, higher viscosity and less deformation. It was found that the ASTM specification tests including penetration, viscosity and elastic recovery provided good references to separate PMA from straight binders. The ASTM specification, however, appeared inadequate to predict deformation because binder properties at test temperatures could not discriminate between different circumstances. The results of the ASTM tests did not show good agreement with rut depth measured from the test road. The SHRP parameter, G*/sinδ, was shown to be a reliable indicator to correlate with pavement rutting. Furthermore, PMA binders in this study demonstrated relatively high aging resistance and continued elasticity after being exposed to in-situ conditions. The enhanced performance characteristics as a result of adding SBS to binders were shown to be helpful to meet the severe demands from increased traffic volumes and higher axle loadings.
Construction of Test Road to Evaluate Engineering Properties of Polymer-Modified Asphalt Binders
As polymers are being increasingly used for modification to enhance the properties of asphalt pavements, ASTM published its first specification for polymer-modified asphalts (PMA) in 1996. This paper reported the results of evaluating the ASTM specification of PMA mixed with styrene-butadiene-stvrene (SBS) copolymers. A 4-km in-service test road was constructed in this study to monitor the performance of asphalt pavements made of two straight and two PMA binders. The rheological properties of straight and PMA binders are discussed. Laboratory and field test results indicated that blending SBS with straight asphalt brought a range of performance benefits including higher elasticity, higher viscosity and less deformation. It was found that the ASTM specification tests including penetration, viscosity and elastic recovery provided good references to separate PMA from straight binders. The ASTM specification, however, appeared inadequate to predict deformation because binder properties at test temperatures could not discriminate between different circumstances. The results of the ASTM tests did not show good agreement with rut depth measured from the test road. The SHRP parameter, G*/sinδ, was shown to be a reliable indicator to correlate with pavement rutting. Furthermore, PMA binders in this study demonstrated relatively high aging resistance and continued elasticity after being exposed to in-situ conditions. The enhanced performance characteristics as a result of adding SBS to binders were shown to be helpful to meet the severe demands from increased traffic volumes and higher axle loadings.
Construction of Test Road to Evaluate Engineering Properties of Polymer-Modified Asphalt Binders
Chen, Jian-Shiuh (author) / Lin, Chih-Hsien (author)
International Journal of Pavement Engineering ; 1 ; 285-295
2000-11-01
11 pages
Article (Journal)
Electronic Resource
English
Polymer modified asphalt binders
| Online Contents | 2007
Polymer modified asphalt binders
| British Library Online Contents | 2007
Rheological Properties of Polymer-Modified Asphalt Binders
British Library Online Contents | 1999