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Key Words: whitetopping, steel fiber reinforced concrete, porous concrete, FEM model, FWD

LOADING PERFORMANCE OF WHITETOPPING USING SEVERAL TYPES OF CONCRETE

Takashi TOMOTO, Hiroji KOSEKI, Hidenori HAMADA and Tatsuo NISHIZAWA

Whitetopping is thin concrete overlay on asphalt pavements. However, the structural design method has not been established, because the bonding between concrete and asphalt layers is the important parameter and has not been cleared. In this study, we constructed the field trial of whitetopping using several types of concrete, conducted loading tests and measured strains in the concrete and asphalt layers. Through comparing the measured strains and the analyzed strains using FEM, we obtained the bonding parameters and elastic moduli of asphalt layers. Furthermore, we conducted the FWD tests and back-calculation of elastic moduli and calculation of transfer efficiency. Results showed that the structural evaluation of whitetopping would be possible by the FWD deflection.