Development of a Hollow-Cylinder Tensile Tester to Obtain Fundamental Mechanical Properties of Asphalt Paving Mixtures

Abstract

259 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2001.The HCT device was found to be both accurate and repeatable. The coefficient of variation was measured for the HCT and IDT tensile strength results. In general, the coefficient of variation of the HCT strengths was found to be lower than that of the IDT strengths, particularly for ultimate tensile strengths. The HCT and IDT were found to compare favorably in the determination of creep compliance at higher loading times, and first-failure strength. Thus a fundamental, test-independent strength property can be obtained with either device. On the other hand, ultimate tensile strength was found to be test mode and mixture-dependent. In general, ultimate tensile strengths were considerably higher in the HCT than the IDT, particularly for polymer-modified mixtures. The HCT ultimate strength was found to be strongly correlated to modification level, as opposed to the IDT ultimate strength, which was very weakly correlated to modification level.U of I OnlyRestricted to the U of I community idenfinitely during batch ingest of legacy ETD