Immersion Marshall test,vacuum water-saturated Marshall test and freeze-thaw splitting test for large stone porous asphalt mixtures(LSPM-30) with different asphalt content were conducted.Test results show that there is an optimum asphalt content at which retained stability and retained strength ratio of specimen reach the maximum.The immersion Marshall test and freeze-thaw splitting test have certain(limi-)(tation) to evaluate moisture susceptibility of LSPM-30.Comparative study on moisture susceptibility o...