Abstract
Because there is a lack of studies on rubberized asphalt based on silane coupling agent modification, KH-550 modified crumb rubber and rubberized asphalts incorporating normal rubber and modified rubber were prepared, respectively. The rheological properties of asphalt samples were evaluated by a dynamic shearing rheometer and a bending beam rheometer; then, mechanisms of KH-550 on rubber surface and functional group changes were analyzed by a Brunauer–Emmett–Teller specific surface area measurement and a Fourier transform infrared spectroscopy. The results imply that: (i) rubber surface area rises and chemical reactions accrue between rubber and asphalt; (ii) modified rubber achieves a more stable state within asphalt, which helps to enhance the mechanical properties of asphalt; (iii) modified rubber helps asphalt to dissipate stress so as to resist the formation of cracks and deformation under low temperature conditions.
Highlights
Rubberized asphalt (AR) has been developed well in recent years, because of the huge consumption of waste tires for manufacturing the crumb rubber (CR), and the presentation of excellent road performance in the road engineering
The servicing performance under a high temperature environment was improved by a stronger interface adhesion state formed between modified CR (MCR) and asphalt through chemical reactions, which means the dynamic mechanical properties of rubberized asphalt are enhanced by KH-550
Most of the load is absorbed by rubber powder, combination of MCR and asphalt caused by chemical action, on the one hand, the movement of the so its S is smaller and m-value is larger [24]
Summary
Rubberized asphalt (AR) has been developed well in recent years, because of the huge consumption of waste tires for manufacturing the crumb rubber (CR), and the presentation of excellent road performance in the road engineering. Researchers and constructors find that CR would gradually segregate from the top asphalt and sink to the bottom during all mixing, transporting, and construction procedures, which results in uneven road performance of pavement, such as weeping (extensive oil), rutting, and aging. All these diseases may be accrued at the very beginning and be harmful to the long-term servicing [7,8,9]. When materials requiring silane modification are mixed with KH-550 solution, KH-550 grafts on the materials’ surface through chemical reactions by its organic functional groups. The present research provides an important approach for population and application of CR surface modifications in road construction
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
