DURABLE PAVEMENT WITH ECC

摘要

While jointed plain concrete pavement (JPCP) has been extensively used in highwayconstruction due to the wide availability of concrete materials, brittle fracture failure due torepeated loadings remains the major limitation to its durability and service life. The use ofductile concrete named Engineered Cementitious Composite (ECC) as an alternate pavementmaterial should arrest such failure mode and greatly enhance its long term durabilityperformance. In this paper, we introduce and demonstrate this concept via experimental studyof the fatigue performance of ECC beam and FEM analysis of pavement structures. The ECCspecimens totally eliminate the single fracture mode in concrete by developing extensivemicro-cracks under flexural fatigue loading, in addition to a much enhanced modulus ofrupture compared to controlled concrete specimen. Based on FEM analysis of the ECCpavement and fatigue performance of the ECC beam, a simplified design chart for ECCpavement is presented to facilitate the implementation of the proposed technology.