Influence of acetic acid modification on the performance of steel slag asphalt mixture and its microscopic mechanism
This study aims to evaluate the effects of acetic acid modification on the properties of steel slag and its asphalt mixtures,and to explore the micro-mechanisms of modification.Steel slag is treated with different concentrations(5%,10%,and 15%)of acetic acid solution,and compared with untreated steel slag and basalt.This research comprehensively employs macro and micro experi-mental methods.On the microscopic level,Scanning Electron Microscope(SEM)and X-ray Fluores-cence Spectroscopy(XRF)techniques are used to reveal the changes in chemical composition and micro-morphology of the modified steel slag.On the macro level,the focus is on evaluating the road performance and volumetric expansiveness of the steel slag asphalt mixture.The results show that ace-tic acid treatment significantly reduced the expansive substances(f-CaO and f-MgO)on the surface of steel slag,effectively inhibiting its volumetric expansion.At an acetic acid concentration of 15%,the volumetric expansion rate of the steel slag asphalt mixture can be reduced to 0.3%.Moreover,acetic acid modification has little impact on the physical and mechanical properties of steel slag,and the adhe-sion between the modified steel slag and asphalt is good,resulting in excellent road performance of the modified steel slag asphalt mixture.
万方数据
维普
