Synthesis and Utilization of Mesoporous Hollow Silica Particles for Bitumen
In recent years, nanoparticles with special structures have been widely used in the traditional building material bitumen. For that, mesoporous hollow silica (MHS) particles were synthesized in this work. Scanning electron microscope, transmission electron microscope, and Brunauer Emmett Teller tests were conducted to characterize the specific structure. Then, MHS was used to improve the properties of the traditional construction binder material bitumen. Penetration, softening point, and dynamic shear rheometer tests were performed to study the physical and rheological properties of MHS modified bitumen. A pyrolysis gas chromatography mass spectrometry test was used to evaluate the inhibition effect of MHS on the emission of the bitumen volatile organic compounds (VOCs) The results showed that MHS with continuous distributed pore diameters were simply synthesized in one step by hydrothermal method. MHS as a kind of additive could improve the high temperature rutting resistance of bitumen. In addition, because of the higher specific surface area and massive micropores, MHS had a significant inhibition effect on the emission of bitumen VOCs.
Journal of Testing and Evaluation