Resistance to Ultraviolet Aging of Nano-SiO2 and Rubber Powder Compound Modified Asphalt

Abstract

Ultraviolet (UV) aging degrades the life span of asphalt pavement, nanomaterials used as modifiers exhibit good shielding function on UV light, but generally degrade the low-temperature property of asphalt, a compound modification was found to be a solution. In this study, nano-SiO2 and rubber powder were blended together with base asphalt to prepare compound modified asphalt. Compound modified asphalt with different blending dosages were subjected to UV light via a self-made UV aging simulation chamber. Basic performance tests and rheological tests were conducted including the UV aging influence. An optimum compound ratio was finally recommended based on the goal to remove the adverse effect of nano-SiO2 on the thermal cracking. Results show that the anti-UV aging property of asphalt is improved obviously due to the blocking function of nano-SiO2 and carbon black in rubber powder, and the enhancing effect of nano-SiO2 is found to be the most significant.

Mechanical Properties of the Interfacial Bond between Asphalt-Binder and Aggregates under Different Aging Conditions

“…Qian et al [ 21 ] found the anti-ultraviolet aging performance of asphalt was obviously improved because of the barrier effect of nano-SiO 2 and carbon black in rubber powder. Cheraghian et al [ 22 ] found the clay and fumed silica nanoparticles could reduce the index of carbonyl and oxidation degree, thus improving aging resistance to ultraviolet (UV) radiation.…”

Rheological Properties of Graphene/Polyethylene Composite Modified Asphalt Binder

“…As a novel asphalt modifier, nanomaterials have attracted a lot of attention from pavement researchers. Research results have shown that specific nanomaterials such as nano-clay [ 17 ], nano-TiO2 [ 18 ], nano-SiO2 [ 19 ], carbon nanotubes (CNTs) [ 20 ], graphene nanoplatelets (GNPs) [ 21 ], and graphene oxide (GO) [ 22 ], can greatly improve the mechanical properties, aging resistance, fatigue resistance, and adhesion properties of asphalt binders. Although the above-mentioned nanomaterials improved some properties of asphalt binders, the improvement varied.…”

Environment Effect on the Rutting Resistance of Nano‐SiO2‐Modified Asphalt Concrete: Temperature and Water

“…Shafabakhsh et al explored the effects of nano-SiO 2 on low-temperature cracks in asphalt mixtures, using a semicircular bending test (SCB) under the loading of I/II mixture [20]. Qian et al showed that the anti-UV aging property of asphalt is improved obviously due to the blocking function of nano-SiO 2 and carbon black in rubber powder, and the enhancing effect of nano-SiO 2 is found to be the most significant [21]. Yang et al investigated the effects of nano-SiO 2 content on the Engler viscosity and storage stability of asphalt emulsion as well as the performances of asphalt emulsion residue [22].…”