Strength and Durability of Roller-Compacted HVFA Concrete Pavements

This investigation was conducted to collect state-of-the-art information on the strength and durability of roller-compacted concrete (RCC) for pavement construction made with and without supplementary cementitious materials, and to describe the construction experience gained in two pavement projects (Projects I and II) recently completed in Wisconsin. Project I deals with performance of conventional high-volume fly ash (HVFA) concrete pavement having a roller-compacted, no-fines permeable base course containing fly ash obtained from an SO2 control technology (dry desulphuring process), and Project II deals with RCC pavement (RCCP) containing 30% ASTM Class C fly ash. Past studies have shown that mechanical behavior of RCCP is similar to that of conventional paving concrete. However, nonair-entrained RCC is susceptible to freezing and thawing (F and T) damage if critically saturated when subjected to freezing actions. Laboratory testing of specimens derived from the pavements showed excellent results for conventional HVFA pavement, and satisfactory performance of the RCCP except for F and T resistance. Specimens from the RCCP performed poorly in laboratory freezing and thawing testing according to ASTM C 666, Procedure A. However, they showed adequate performance for up to 210 cycles of F and T when tested in accordance with ASTM C 666, Procedure B.