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- W2158521639 abstract "A new hollow cylinder tensile test (HCT) device was developed, which can be used to obtain fundamental properties of asphaltic paving mixtures, such as creep compliance, tensile strength, and dynamic modulus, at low and intermediate temperatures. The device was originally developed to be a compact, portable, and operationally simple surrogate test to obtain similar properties as the Superpave Indirect Tensile Tester (IDT), but is capable of obtaining properties at both low and intermediate pavement service temperatures. The device produces strain in an asphalt cylinder by applying pressure to the inner cylinder wall, causing tensile or hoop stress to develop in the cylinder. The load system is also used to measure specimen deformation, which makes specimen preparation and device operation very simple. Three-dimensional finite element analyses were conducted to model practical test conditions in the HCT, including effects of eccentrically cored test specimens. A series of simple formulas are presented, which allow stresses and strains to be accurately determined from test measurements, based upon finite element results and the elastic-viscoelastic correspondence principle. Formulas for tensile strength and creep compliance are presented, the latter of which requires that creep tests are conducted in the linear viscoelastic range. Preliminary tests have been conducted using a prototype HCT, which have shown very promising results. A reference material was measured to within one percent of expected modulus, and tests on asphalt concrete have produced very reasonable properties. Measurement resolution, even for very stiff materials, has been found to be exceptionally good. This is due to the large gage area of HCT specimens, e.g., the cylindrical cavity wall. A comprehensive validation program is now needed to verify the accuracy and repeatability of the HCT." @default.
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- W2158521639 date "1999-01-01" @default.
- W2158521639 modified "2023-09-26" @default.
- W2158521639 title "Development of a Hollow Cylinder Tensile Tester To Obtain Mechanical Properties of Bituminous Paving Mixtures" @default.
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