Complex Modulus Testing of Asphaltic Concrete: RILEM Interlaboratory Test Program

Abstract

An interlaboratory test on bituminous materials was initiated in 1990 to promote and develop mix design methodologies and associated significant measuring methods. The exercise was carried out on materials obtained from a full-scale test site. Repeated loading tests were performed in this program by 15 participating laboratories to determine two basic material properties: the complex modulus and the fatigue law. The main conclusions derived from the analysis of complex modulus measurements and further discussions of the summary report with the participants are summarized. This intensive common effort has allowed several participants to make substantial improvements in their procedures and equipment. Recommendations are expected to induce further progress in the harmonization of different test methods.