A knowledge of the variation in fundamental engineering properties of the construction materials is essential to a comprehensive evaluation of the performance of various road sections. This study supports the louisiana experimental base project, an in-service experimental road project that aids in an evaluation of design-performance characteristics of a number of experimental test sections. The expected variation in the static and resilient (fatigue) properties of thematerials in the layers of the pavement structure can provide an inherent variation data base from which continuing evaluation and analysis of pavement behavior and performance of these layers could be undertaken. A material characterization and inherent analysis of a resilient (fatigue) test program was undertaken to establish the magnitude, scope, and expected variation in fundamental engineering properties of laboratory-prepared specimens and field cores of the asphaltic materials used in the wearing, binder, and black base layers of the test sections of the base project. Variation analyses were completed for such fundamental properties as modulus, poisson's ratio, and fatigue cycles to failure. Regression analysis techniques were also used to quantify those factors that significantly affect the fatigue life of the various construction materials used in the louisiana experimental base project. This information, when combined with the in-service performance results from the base project, should improveknowledge of the important mix variables affecting the fundamental engineering-performance properties and result in improvements in quality control measures. This paper appears in transportation researchrecord no. 1317, Asphalt mixtures: design, testing, and evaluation 1991.
Samenvatting