Silane Modification of Crumb Rubber on the Rheological Properties of Rubberized Asphalt

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.

Chemical characteristics, leaching, and stability of the ubiquitous tire rubber-derived toxicant 6PPD-quinone

“…, the surface area of crumb rubbers is measured at hundreds to thousands of cm 2 g −1 (ref. 44–46)). The high specific surface area indicates a porous structure which can retain inaccessible or kinetically limited 6PPDQ mass during equilibration 47–49 compared to smooth surface materials ( e.g.…”

“…For instance, although it is highly variable and depends upon material type and sizes, the surface area of rubbers is typically high (e.g., the surface area of crumb rubbers is measured at hundreds to thousands of cm 2 g −1 (ref. [44][45][46]). The high specic surface area indicates a porous structure which can retain inaccessible or kinetically limited 6PPDQ mass during equilibration [47][48][49] compared to smooth surface materials (e.g., glass).…”

Waste Not, Want Not: Sustainable Use of Anti-Stripping-Treated Waste Ceramic in Superpave Asphalt Mixtures

“…The synergic effect of incorporating waste ceramic (untreated and treated) in asphalt mixtures was evaluated through ATR-FTIR analysis. As shown in Figure 13, some characteristic peaks can be observed in the tested mixtures: 2922 cm −1 produced by the aliphatic CH 2 bond [47,48]; 2360 cm −1 representing antisymmetric stretching of the CO 2 bond [49]; 1418 cm −1 and 1459 cm −1 generated by the CH bond [50,51]; 1032 cm −1 referring to Si-O-Si bonds [18]; 1015 cm −1 and 933 cm −1 stimulated by the S=O bond (sulfoxide group) [52][53][54]; 872 cm −1 generated by the C-H bond [47]; and 795 cm −1 , 776 cm −1 , and 774 cm −1 referring to Si-O bonds [55].…”

Evaluación experimental de la resistencia del concreto modificado con caucho

“…A diferencia de otras investigaciones, en las que se aplicó un tratamiento químico a las partículas de caucho (Youssf et al, 2016;Zhang, Liu & Peng, 2019;Li et al, 2004), y con el objetivo de reducir el costo económico generado por el uso de caucho como agregado en el concreto, en este estudio experimental no se les trató de forma especial. Además, se retiraron los alambres de acero de los neumáticos triturados, como se observa en las figuras 2 y 3.…”