Rutting Development and Model Prediction of Steel Slag Asphalt Concrete
Volume expansion tests under long-term water immersion and accelerated loading rutting tests were per-formed on steel slag asphalt concrete.Test results indicate that steel slag asphalt concrete designed by using crumb rub-ber composited modified asphalt and gap gradation has an accumulated rutting depth smaller than 5 mm and the rutting was mainly induced by densification effect.The 60 ℃ water immersion test for 7 d were used to investigate the effects of volume expansion of steel slag asphalt concrete.It indicates that after water immersion,the rutting depth increases 22％,while it increases 8％under heavy loading.The combined effect of moisture and heavy loading results in 32％in-crease on rutting depth.The proposed rutting model can well predict the development of rutting depth and thus can be used for the durability design of steel slag asphalt concrete.
NETL
NSTL
万方数据
