Asphalt Mixture Behavior in Repeated Flexure,

摘要

The report describes research completed during the 1968-69period on this continuing research project concerned with (1) factors affecting the fatigue response of asphalt paving mixtures (2) incorporation of the fatigue factor in the design of asphalt concrete pavements. During this period investigations were concentrated in three areas,namely: (1) development of fatigue data for an in-service pavement near Folsom,California; (2) development of a simplified representation of the fatigue response of California type mixes as input to a fatigue subsystem for pavement design;and (3) definition of a relationship between direct tensile and fatigue response of asphalt mixtures recognizing that direct tensile testing offers a potentially useful and simple means by which the fatigue factor can be incorporated in the materials control process. Reasonable agreement between data obtained from the laboratory compacted and the field specimens was observed. Accordingly the data will serve as a reasonable basis for the prediction of service life of the Folsom pavement. (Author)