Viscous, damping, and mechanical properties of epoxy asphalt adhesives containing different penetration‐grade asphalts

Abstract

Epoxy asphalt adhesive (EAA) is a thermosetting polymer modified asphalt that has been widely applied on steel bridge decks as a strong adhesive and waterproof layers. In this study, the influence of the asphalt penetration grade on the viscosity, damping and mechanical properties, bond strength, and microstructures of EAAs was investigated. The viscosity of the EAAs increased with increasing asphalt penetration grade. The presence of base asphalt increased the glass-transition temperature (T g ) of the neat epoxy. The asphalt penetration grade had a negligible effect on the T g values of the EAAs. The existence of base asphalt improved the damping behaviors of the neat epoxy. Moreover, the damping properties of the EAAs increased with increasing asphalt penetration grade. The tensile strength, elongation at break, and bond strength values of the EAAs increased with increasing asphalt penetration grade. The bond strengths of the EAAs were 7-to 10-fold higher than that of the neat asphalt. The asphalt penetration grade had a negligible effect on the bond strengths of the EAAs. Morphological observations revealed that the average size of the dispersed asphalt particles in the epoxy decreased with increasing asphalt penetration grade. A more homogeneous phase separation was formed in the EAA with a higher penetration-grade asphalt.

Application of Epoxy-Asphalt Composite in Asphalt Paving Industry: A Review with Emphasis on Physicochemical Properties and Pavement Performances

“…e damping properties of EA correlated well with noise and vibration reduction capability, which have often been characterized by tanδ at room temperature ((tan δ) RT ) [7,69] or maximum tan δ ((tan δ) max ) [7,16,72,129], temperature range (ΔT) for effective damping (tan δ > 0.3), and the area under tan δ versus temperature curve (TA) [7,16,72,129] (see Table 2). Large values of (tan δ) RT , (tan δ) max , TA, and ΔT indicate better damping properties for EA [69].…”

“…e tensile strength was increased, and the elongation was decreased while the asphalt content was reduced [16,73,81,113] (see also Figure 26) or curing time was increased in EA [5,20,113,124]. With the increase of penetration grade, tensile strength and elongation for EA were both increased [129] and this increase might be attributed to better dispersion of asphalt particles within the epoxy matrix for softer binder. A peak tensile strength value of epoxy repair materials was obtained when 10 phr asphalt was added to ER [84].…”

“…With the increase in the asphalt content, superior damping properties were reported due to improved flexibility of EA [7,16]. For EA, damping properties were also found to increase with increasing asphalt penetration grade [129]. As compared with styrenic polymer-modified EA, neat EA showed superior damping properties [80].…”

“…However, as the curing reaction progresses, the viscosity of EA decreases with increasing asphalt content [7,15,32,56,79,81,113], which indicates that asphalt binder can delay the curing reaction of EA in the later stage by diluting ER and curing agents [56]. On the other hand, viscosity of EA was reported to decrease with increasing penetration grade in the initial curing stage and it was lower than that of pure ER [129]. Afterwards, viscosity of EA increased with the increasing penetration grade and it was higher than that of pure ER.…”

The Reduction in the Deformation of HDPE Composites Using Self-Lubricating Fillers in an Aqueous Environment

“…Tetra-needle-like ZnO whiskers (T-ZnOw) can reduce the surface deformation of high-density polyethylene (HDPE) composites due to its unique three-dimensional structure which can restore worn surfaces [ 25 , 26 ]. In addition, the utilization of flower-like fillers, such as MoS 2 , can transform an applied external force into internal friction within the polymers by increasing the contact area, which decreases the surface deformation tendency [ 27 , 28 , 29 , 30 ]. Furthermore, a few particles with chemical potential have been studied to improve the lubricating effects of polymers in particular lubricating conditions.…”