Study on Rheological Properties of Graphene Oxide/Rubber Crowd Composite-Modified Asphalt

Abstract

In order to improve the durability of asphalt pavement and prolong the service life of heavy traffic asphalt pavement, graphene oxide (GO) and rubber powder (RP) were used as composite modifiers to modify matrix asphalt. The high-temperature rheological properties of composite-modified asphalt at different temperatures and frequencies were analyzed. The influence of different stress levels on the viscoelastic properties of composite-modified asphalt was evaluated. The low-temperature rheological properties of composite-modified asphalt were studied. The difference between RP-modified asphalt and GO/RP composite-modified asphalt was analyzed, and the mechanism of GO and RP on asphalt modification was explored. The results show that the composite-modified asphalt has good rheological properties at low temperature, relatively smooth surface and stable network structure, which improves the segregation problem of RP in matrix asphalt. At present, GO and RP are rarely used as composite modifiers to modify matrix asphalt at home and abroad, which is an innovation in material selection.

Rheological Behavior and Characterization of Drinking Water Treatment Sludge from Morocco

“…During this process, sludge tended to be less viscous, demonstrating shearthinning (pseudoplastic) behavior. Similar rheological behaviors have been reported for sewage sludge [9], ink [27], foam [27], clay [29], paint [30] and chocolate [30], among others [30,31].…”

“…During this process, sludge tended to be less viscous, demonstrating shearthinning (pseudoplastic) behavior. Similar rheological behaviors have been reported for sewage sludge [9], ink [27], foam [27], clay [29], paint [30] and chocolate [30], among others [30,31]. The apparent viscosity of DWTS at the beginning of the test (lowest shears rates) dropped dramatically, and then tended to a relatively constant value (highest shears rates) (Figure 5b).…”

Evaluation of Fatigue Properties of Mixed Asphalt Based on Linear Amplitude Scanning Test

“…As can be seen from figure 2 (c), the slope of the damage curve when SBS modified asphalt is involved is significantly lower than that when the first two groups of matrix asphalt is involved, which further indicates that the stress sensitivity of the matrix asphalt is stronger, and the value of the damage factor is not completely near zero after the amplitude test. [7] It indicates that the strain range of the LAS test involving SBS modified asphalt needs to be expanded. In the figure, the effect of NRA and NRB on the damage curve is almost the same with staggered phenomenon, and the effect of PR and BR is second only to NRA and NRB.…”

Preparation and Road Performance Study of Rubber–Diatomite Composite-Modified Asphalt Mixture

“…To further enhance the performance of rubber-modified asphalt, researchers have made significant efforts. For instance, De Albornoz [14] and Qian [15] investigated the synergistic Materials 2023, 16, 7359 2 of 19 effects of CR and SBS and showed that the aging and mechanical performance of asphalt mixtures produced with rubber-modified asphalt was very similar to that of asphalt mixtures based on traditional SBS-modified asphalt. Li [16] found that oxidized graphene and rubber powder, as composite materials, improved the rheological properties of asphalt at low temperatures.…”

“…For instance, De Albornoz [14] and Qian [15] investigated the synergistic Materials 2023, 16, 7359 2 of 19 effects of CR and SBS and showed that the aging and mechanical performance of asphalt mixtures produced with rubber-modified asphalt was very similar to that of asphalt mixtures based on traditional SBS-modified asphalt. Li [16] found that oxidized graphene and rubber powder, as composite materials, improved the rheological properties of asphalt at low temperatures. In addition, with reduced rubber particle size, rubber-modified asphalt has been proven to exhibit better low-temperature performance, elasticity, and adhesion [17,18].…”