Investigation on the Composition Design and Performance of OGFC-5 Steel Slag Asphalt Mixture
By adding steel slag aggregate into asphalt mixture,different types of OGFC-5 asphalt wear layers were prepared,the composition design of wear layers was explored,and the flying loss,leakage rate,water stability,high and low temperature performance,anti-sliding performance and shear per-formance of wear layers were tested.The results show that the asphalt-aggregate ratio of OGFC-5 as-phalt mixture is slightly increased by adding steel slag,and the effect of steel slag fine aggregate is more obvious.Compared with basalt wear layer,the flying loss and leakage rate of steel slag wear layer are obviously reduced,and the residual stability and freeze-thaw tensile strength ratio are im-proved.The dynamic stability and low-temperature bending and tensile strain of the all-steel slag wear layer are the largest,which are 8750 times/mm and 3150pe respectively.Adding steel slag aggregate into the wear layer can improve the structural depth,pendulum value and shear strength of the mix-ture,and significantly improve the anti-sliding performance and shear performance.
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