Experimental Study on Mechanism, Aging and Fatigue Performance of Warm Mixing Speed Melting SBS Modified Asphalt Binders

Abstract

In this study, two kinds of quick melting modifier SBS-T and SBS-W, as well as the traditional SBS modifier, were used in the optimization design of asphalt binders. The changes in material structure and fatigue properties of three polymer-modified asphalt after adding 3% Sasobit to warm mix agent were investigated. The feasibility of SBS-T and SBS-W in asphalt binder was discussed from the modification mechanism and fatigue properties. In order to reveal the modification mechanism, the interaction mechanism between the fast-melting SBS modifier and the base asphalt was characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The temperature sensitivity and viscoelastic properties of SBS-T and SBS-W modified binders were determined by frequency scanning (FS). The fatigue properties of SBS-T and SBS-W modified binders were tested by linear amplitude scanning (LAS). The results of FTIR showed that there was no chemical reaction between the SBS-T and SBS-W and the base asphalt. XRD results showed that SBS-W-modified asphalt has stronger fluidity. The results of FS and LAS showed that the asphalt binder with Sasobit has good stiffness and elastic recovery ability, and the same SBS-T and SBS-W have better temperature sensitivity and deformation resistance. In addition, the fatigue life of asphalt binder under the linear viscoelastic continuous damage theory is increased 3.9 times by SBS-W.

Investigation on the technical performance and workability of hot-melting road marking materials using for the high-altitude area

“…When the cohesion of cementing material is greater than the adhesion, cracking and breaking will occur at the adhesion interface. When the adhesion is greater than the cohesion, cracking and breaking will occur inside the cementing material [41]. AC-13 matrix asphalt concrete interlayer shear strength is generally 500 kPa, when marking paint adhesion is less than the shear strength of asphalt concrete, marking off will occur [42].…”

The Microscopic Mechanism and Rheological Properties of SBS-Modified Asphalt with Warm Mixing Fast-Melting

“…This is due to dry SBS asphalt modification technology having some advantages in terms of energy savings and emission reduction [ 22 ]. Guolu Gaoke Engineering Technology Institute Co., Ltd. (Beijing, China) has effectively created a warm-melting SBS modifier (SBS-W) based on the research and development system of a fast-melting SBS modifier by fusing small-molecule SBS with organic viscosity reduction technology [ 23 , 24 , 25 ]. The industry used warm mixing and SBS modification integration technology for the first time.…”

Research on the Adhesion Properties of Fast-Melting SBS-Modified Asphalt–Aggregate Based on Surface Free Energy Theory

“…The key to the fast-melting modification process is to shorten the melting time of the modifier and to speed up the dissolution of the modifier in the asphalt [8]. Based on this, Guolu Hi-Tech optimized the structure of the SBS modifier, added components to enhance the quick-melting ability to achieve a balance between the melt index and modification effect, and prepared a quick-melting SBS modifier (SBS-T); the melt index is 100 times higher than that of ordinary SBS, and it can be used directly after being added to the mixture, realizing 1 min rapid melting [9]. Due to the problems of performance degradation in traditional modified asphalt, the addition of the SBS-T modifier can improve this phenomenon.…”