Ditapis dengan
Field validation and parametric study of a thermal crack spacing model
It was found that model predictions compared favorably with field section observations. Also the crack spacing derived by the model was most influenced by the stiffness of the asphalt concrete and supporting layer, the thermal coefficient of contraction of the asphalt concrete, and the frictional properties of the unbound supporting layer. In the future, the model could be used to predict crack…
Forensic investigation of a rich-bottom pavement under accelerated loading
Perpetual pavements are a viable method for prolonging the life of asphalt pavements in the U.S these pavements combine a rut resistent surface layer with a fatigue resistent bottom layer to provide adequete capacity to ensure the pavements long life . In the 2003 test cycle at the National Center for Asphalt Technology (NACT) Test Track, a fatigue resistant bottom layer was used to investigate…
A Modular Data Acquisition System for Heavy Vehicle Simulator Tests
This paper describes the design and fabrication of a Data Acquisition (DAQ) system that uses the latest hardware and software technology. Two systems were built to work with two active Heavy Vehicle Simulators (HVS) at the University of California Pavement Research Center (UCPRC). The new DAQ systems replaced the old ones that were built in 2005. The upgrade was considered necessary because the…
Simulating the Effects of Instrumentation on Measured Pavement Response
Asphalt strain gauge installation procedures have typically used hot mix sieved through a 4.75 mm screen, hand placed over the gauges and hand compacted prior to roller compaction which has led to a high gauge survival rate. This finer mix in the immediate vicinity of the gauge could theoretically yield lower moduli and higher strains. The objective of this study was to evaluate the potential e…
Structural Evaluation and Short-term Performance of Sustainable Pavement Sect…
As state agencies have started to transition from an empirical pavement design method to a Mechanistic-Empirical (ME) approach, it has become necessary to further evaluate the material properties and structural characteristics of newer sustainable pavement technologies. The objective of this study was to evaluate pavement responses and short-term performance for different sustainable pavement s…
