Speaker
Description
Abstract. Many types of nanomaterial, such as nano-TiO2, nano-Al2O3 are frequently used for modifying asphalt to enhance its pavement performance. However, conventional nanomaterials often exhibit limited compatibility with asphalt. This problem can be improved by using solvent-free nanofluids. Solvent-free nanofluids are engineered by surface functionalization of conventional nanomaterials, allowing them to manifest liquid-like characteristics without the use of solvents. In this study, solvent-free SiO2 nanofluid (SiO2 NFs) was used to modify asphalt, in order to improve the performance of asphalt road while improving the compatibility between nanomaterials and asphalt. Fourier Transform Infrared spectroscopy (FTIR) was used to explore the mixing mechanism of solvent-free nanomaterials and asphalt. The storage stability of modified asphalt has been investigated, and the aging performance of the modified asphalt has been studied from a rheological perspective. Results show that the surface functionalization enhances the dispersion and compatibility of nanomaterials in asphalt, resulting in a homogeneous blend system. The introduction of SiO2 NFs improves the short-term and long-term aging properties of asphalt. Furthermore, the modified asphalt demonstrates some improvements in storage stability. These results highlight the significance of employing SiO2 NFs for asphalt modification to enhance compatibility between nanomaterials and asphalt.
