A description of a test method considered appropriate for construction control of asphaltic paving mixtures is presented in this report. The test is for obtaining a measure of the debonding susceptibility of paving mixtures as obtained at the time of production at theplant. The testing method is comparable to most debonding tests in that the results are expressed as /etaid strength that is the ratio of the "exposed" strength to the "unexposed" strength. The main differences of the new test are that the exposure of the compacted specimen is to a repeated pore water pressure, the strength test is done by a double-punch loading, and, most important, the results can be obtained within 6 hr of receiving the hot mixture immediately prior to compaction. The laboratory results obtained with the testing system indicate that a minimum retained strength should be 70%. This paper appears in transportation research record no. 1228, Asphalt mixtures and asphalt chemistry.
Abstract