STUDY ON EVALUATION OF DE-BONDING OF CONCRETE PAVEMENT IN AIRPORT APRON OVERLAID BY CONCRETE PAVEMENT

Abstract

 The apron concrete pavement at the airport in this report has a structure in which a 350mm-thick original concrete pavement has been overlaid with 130mm-thick concrete. When replacing concrete pavement with a total thickness of 480 mm, We need to know the situation where delamination occurs between the overlaid concrete slab and the original concrete slab for the purpose of shortening the construction noise period at night by improving the efficiency of demolition work. The surface deflection was measured by FWD test at the centers and joints of concrete slab. Using the measured deflection values and the inverse analysis values, the extent of de-bonding was assessed for the concrete pavement. As a result, in the concrete slab with delamination, the ratio of the elastic modulus of the original concrete slab to the elastic modulus of the overlaid concrete slab analyzed in reverse tended to decrease.