关键词: 沥青混合料, 单轴贯入蠕变试验, 蠕变劲度

Abstract: Asphalt mixture is a viscoelastic material with grain composition. Grain composition of asphalt mixture determines the higher stress level is adopted in uni-axial creep test at normal temperature. Only lower stress level can be adopted at high temperature, or the sample will be undermined in advance. However, the load is always heavier than 0.8 MPa and the pavement temperature is over 60℃ in the service period. Therefore, the thick rutting plats（30cm × 30cm × 10cm）are used in uni-axial penetration creep test（ that is, single axis penetration creep test）. Making use of the lateral restraint thick rutting plats provide for the asphalt mixture under load, a reasonable test method for the investigation of viscoelastic proper- ties of asphalt mixture under heavy load and at high temperature is obtained.

Key words: asphalt mixture , uni-axial penetration creep test , creep stiffness ;