The effect of cement content on drying shrinkage of roller compacted concrete pavement

Roller compacted concrete pavement (RCCP) became a proper alternative to conventional concrete pavement due to its cost-effectiveness and easier production. RCCP is a zero slump concrete with appropriate mechanical properties which make it to be a durable rigid pavement. It has lower drying shrinkage due to its lower water demand and less cement content compared to normal vibrated concrete. In this research, the drying shrinkage behavior of two type of RCCPs with two different cement dosages of 12% and 15% (of dry materials) was investigated. The experimental test results were also compared with ACI 209.2R-08 drying shrinkage strain prediction model. The test results show that increasing cement content from 12% to 15% has not significant increasing on drying shrinkage strain of the RCCPs at early ages, while, the mix with 15% cement content showed 6% higher drying shrinkage strain in long-term.