Effect of SBR/Waste Ceramic Powder Nanocomposite on High Temperature Performance of Asphalt Binder

Abstract

Modifying asphalt binder with styrene butadiene rubber (SBR) improves low temperature performance (resistance to cracking), elastic recovery, and ductility of binder. However, some of difficulties were found at high temperatures susceptibility (Rutting), and low storage stability (compatibility). Therefore, the aim of this study is to resolve these defects (rutting and compatibility) by formulating SBR/ waste nanoceramic powder (WNCP) nanocomposites. Three nanocomposites formulations are fabricated from SBR/WNCP with mass ratios (90:10), (80:20), and (70:30) respectively. The prepared nanocomposites are assessed by XRF, XRD, and DLS. Asphalt binder is modified by 5wt% from each fabricated nanocomposite. Physical tests of modified asphalt binder including softening point, penetration, and penetration index are measured. The high temperature performance; rutting factor (G*/sindelta) is studied with DSR before and after exposure to short term aging. The compatibility of modified binder was studied by conducting storage stability test. Results confirmed that fabrication of SBR/WNCP nanocomposite enhance the compatibility, storage stability, and stiffness of blended binder. Also, DSR results approved that the rutting resistance of binder is enhanced.

Rheological Performance Analysis of Different Preventive Maintenance Materials in Porous High-Viscosity Asphalt Pavements

“…The preventive maintenance method mainly utilizes preventive treatments to delay the drainage pavement damage, extend its service life, and maintain or improve the anti-skid, drainage, anti-glare and noise reduction requirements without increasing the structural load-bearing capacity [18,19]. Maintenance materials are critical to improve the effectiveness of preventive maintenance, which are mainly to added with special ingredients through the void penetration dispersed in the structural layer to restore the aging properties of asphalt or heal asphalt cracks [20,21]. To prevent cohesive damage within the drainage pavement and delay the deterioration of high-viscosity asphalt, preventive maintenance materials need to provide the following properties: (1) significant age-reducing ability; (2) compatibility with high-viscosity asphalt; (3) spreading and flowing easily in the pavement; (4) effective viscosity enhancement; and (5) fast curing.…”