EFFECT OF PUMPING AND COMPACTION ON FROST DAMAGE RESISTANCE OF HIGHLY DURABLE RC ROAD BRIDGE DECK USING MICRO SPHERE

Abstract

On reinforced concrete（RC）road bridge deck in cold regions, highly durable RC road bridge deck with multiple defense concept introduced is proposed as a countermeasure for complex deterioration of salt damage, frost damage and alkali silica reaction（ASR）and its effectiveness are demonstrated. In this study, type IV fly ash and micro sphere made of resin are used in combination with highly durable RC road bridge deck, and the applicability is evaluated using a full-scale simulated road bridge deck assuming construction site. As a result, it was confirmed that the amount of air less than 0.15mm, which is effective for frost damage resistance, was uniformly entrained regardless of the effects of pumping and compaction, and that frost damage resistance was reliably ensured.