| ABSTRACT: To improve the fatigue durability of steel slab decks on long-span bridges、 high-performance fiber-reinforced cementitious composite (HPFRCC) has been used. The composite is used to thicken the upper surface of the slab. However、 deterioration of such slabs from block cracking of the composite、 probably attributable to water、 has been reported. We conducted a field survey of deteriorated deck slabs and various lab tests to identify the mechanism of HPFRCC deck slab deterioration and to propose countermeasures and retrofit methods. Here we report our predictions for the mechanism of HPFRCC deck slab deterioration. |
