Oo viscous. Hence, the rubber-powder content should not be as well high.
Oo viscous. Thus, the rubber-powder content shouldn’t be as well high. We determined that the optimal quantity of rubber powder is 30 . three. Characterization and Overall performance Testing The properties from the rubber-modified asphalt and asphalt mixture had been then analyzed working with the multi-scale study idea. In this technique, asphalt acts as a binder to bond the aggregate into a entire, as a result providing the necessary structural strength. Therefore, we analyzed the microstructures of rubber-modified asphalt with distinct contents from a microscopic point of view. In this study, the efficient asphalt film thickness with the rubber-powder-modified asphalt mixture was analyzed to ensure the mixture’s general durability. A dynamic shear rheometer (The AR1500ex shear rheometer created by the TA firm, Boston, MA, USA) was, in addition, used to measure the rheological parameters in the asphalt. Dynamic modulus tests (Rambo Assume Material Testing Co., LTD, Shenzhen, Guangdong Province, China) were carried out on distinctive asphalt mixtures to figure out the dynamic moduli and phase angles at various temperatures and frequencies so as to discover the dynamic viscoelastic properties of your asphalt mixtures modified by rubber powder. three.1. Characteristic Test at a Micro Scale We carried out the microstructural analysis of rubber-powder-modified asphalt and its mixtures from a microscopic point of view. The surface in the sample was scanned with the electron beam of a Bomedemstat Autophagy scanning electron microscope (SEM) (SIGMA 300 scanning electron microscope developed by the Carle Carl Zeiss Company, Obercohen, Germany) to acquire a high-resolution image of your sample surface, which was then utilized to identify the surface structure of your sample and analyze the microstructure on the rubber-powder-modified asphalt. We then determined the asphalt film thickness with the rubber-powder-modified asphalt mixture and applied the electron-microscope-scanning system to examine and right the asphalt film thickness. The experimental style is shown in Table 2.Table 2. Micro-scale characteristic test Tenidap site scheme.ProjectTechnical Indicator SEM electroscope scanning testStandard MethodTest Material Rubber-powdermodified asphalt (25 , 30 , 35 rubber-powder content)Test Conditions The sample was frozen and brittle-fractured, after which the fracture surface was etched using a solvent We calculated the thickness with the asphalt film depending on the effective asphalt content determined utilizing the centrifugal separation process (correcting for the scanning electron microscope)JB/T 6842-Micro-Structural Evaluation Asphalt film thickness JTG E20-Stone Mastic Asphalt having a maximum dimension of aggregates of 13 mm (30 rubber-powder content material)Coatings 2021, 11,eight of3.two. Meso-Mechanical Evaluation 3.2.1. Dynamic Shear Rheological Test Procedures (DSR) To discover the influence of rubber powder on the higher temperature rheological properties of asphalt, a dynamic shear rheometer (TA business, Boston, MA, USA) was utilized to scan the asphalt at unique feed frequencies and temperatures. Linear viscoelastic parameters including the complicated shear modulus (G) and rutting aspect (G/sin ) had been obtained in the experiment. Amongst them, the complicated shear modulus (G) reflected the fatigue resistance on the asphalt. The bigger the complicated shear modulus (G) is, the far better the fatigue resistance might be. The rutting factor (G/sin ) represents the asphalt’s resistance to deformation, where the larger the rutting factor (G/sin ), the stronger the material’.
