A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
To evaluate the recycling potentials of the aged styrene-butadiene-styrene (SBS)-modified asphalt binder, effects of the short-term and long-term oxidative aging on the physical properties, rheological properties and microstructure characteristics of the aged SBS-modified binder were investigated. Results showed that the aging of SBS-modified binder consists of two parts: (i) the oxidative aging of the asphalt components and (ii) the degradation of the SBS modifier. The aging inevitably leads to a hardening and brittle binder. By characterizing the aging behaviors of SBS-modified binder, the recycling of aged SBS-modified binder was conducted by adding a recycling agent and a modifying additive. The recycling agent is normally used in unmodified binder for rejuvenation. The modifying additive can benefit the asphalt mixture performance. Results indicated that the commonly used recycling agent may not enhance the performance of the recycled polymer modified asphalt when it is used alone. The rejuvenation of aged polymer modified asphalt requires new additive with well-balanced modification effect. It is found that the recycling agent together with a modifying additive MATM are proved to be capable of restoring the durability of SBS-modified binder and eventually satisfying the desired road performance. Therefore, compound rejuvenation method of polymer modified asphalt was recommended.
To evaluate the recycling potentials of the aged styrene-butadiene-styrene (SBS)-modified asphalt binder, effects of the short-term and long-term oxidative aging on the physical properties, rheological properties and microstructure characteristics of the aged SBS-modified binder were investigated. Results showed that the aging of SBS-modified binder consists of two parts: (i) the oxidative aging of the asphalt components and (ii) the degradation of the SBS modifier. The aging inevitably leads to a hardening and brittle binder. By characterizing the aging behaviors of SBS-modified binder, the recycling of aged SBS-modified binder was conducted by adding a recycling agent and a modifying additive. The recycling agent is normally used in unmodified binder for rejuvenation. The modifying additive can benefit the asphalt mixture performance. Results indicated that the commonly used recycling agent may not enhance the performance of the recycled polymer modified asphalt when it is used alone. The rejuvenation of aged polymer modified asphalt requires new additive with well-balanced modification effect. It is found that the recycling agent together with a modifying additive MATM are proved to be capable of restoring the durability of SBS-modified binder and eventually satisfying the desired road performance. Therefore, compound rejuvenation method of polymer modified asphalt was recommended.
Aging Behavior Characterization of SBS-Modified Asphalt for Recycling Purpose
Second International Conference on Sustainable Construction Materials: Design, Performance, and Application ; 2012 ; Wuhan, China
Sustainable Construction Materials 2012 ; 261-275
2012-12-13
Conference paper
Electronic Resource
English
Aging mechanism and effective recycling ratio of SBS modified asphalt
| Online Contents | 2014
Aging mechanism and effective recycling ratio of SBS modified asphalt
| British Library Online Contents | 2014