Inventors:
Roger A. Pyle - Clarion PA, US
E. Frank Dalton - Mercer PA, US
Assignee:
Pine Instrument Company - Grove City PA
International Classification:
G01N 3/32
Abstract:
The moisture susceptibility material testing apparatus includes a specimen chuck, multiple rollers, a temperature controlled water bath, and a control system to automate the testing cycle and collection of data. The water bath is prepared at the desired testing temperature. A material specimen, such as a cylindrical hot mix asphalt (HMA) material specimen, is placed within the water bath on multiple rollers and a specimen chuck then clamps the specimen with an adjustable force. A first and second roller are positioned about the exterior circumference of the cylindrical specimen and a predetermined force is applied radially to the specimen through a third roller. The specimen is rotated about its cylindrical axis, driven by the rotation of the rollers and specimen chuck. A displacement sensor monitors the position of the third roller, yielding a measurement of the rut depth on the material specimen. The number of revolutions the specimen experiences while the force is applied and the rut depth are recorded during the test.