Durability of In-Place Concrete Containing High-Range Water-Reducing Admixtures

摘要

The report documents and presents the results of a field study of the durability of portland cement concrete highway wearing surfaces containing high-range water-reducing admixtures. Durability surveys were carried out on 12 structures ranging from 4 to 12 years of age. These structures include highway bridges decks, bridge deck overlays, and pavements. The total area affected by very light to moderate scaling, where coarse aggregate particles were significantly exposed. A three-parameter performance model including water-cement ratio, amount of entrained air removed from the surface, and air-void spacing factor was developed and offered reasonable correlation with the field observations. The findings of the study indicate that high quality, durable concrete can be produced using high-range water-reducing admixtures.