Road Performance of Asphalt Mixture with Steel Slag
Taking steel slag,Reclaimed Asphalt Pavement(RAP)and ordinary basalt macadam as research objects,the influence of steel slag and RAP content on asphalt pavement design standard is evaluated based on volume index.Through immersion Marshall test,rutting test and pendulum test,the feasibility of high content application of steel slag and RAP in asphalt mixture is quantitatively stud-ied,and compared with pure natural aggregate asphalt mixture.The results show that the mixing of steel slag and RAP does not affect the design standard of the mixture.The high temperature stability and skid resistance of the three types of mixtures can meet the re-quirements of the specification;Compared with the pure natural aggregate asphalt mixture,the Residual Marshall Stability(RMS)gradu-ally decreases with the increase of RAP and steel slag content.When the RAP and steel slag content is60%,the RMS is78.7%and 84.3%respectively.When the steel slag content is60%,the dynamic stability of asphalt mixture is1.21 times that of ordinary basalt mixture.When the steel slag content reaches60%,the British Pendulum Number(BPN)is95.4,which is8%higher than the sliding resistance of ordinary basalt mixture.
万方数据
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