Determination of the type and thickness for impervious layer in RCC dam

The distribution of temperature is simulated using 3D finite element relocating mesh method (TDFERMM) for the third grader roller compacted concrete (TGRCC) dam with different material and different thickness of impervious layer, including conventional concrete (CC), grader-enrich-concrete (GEVRCC) and second grader roller compacted concrete (SGRCC) during construction period. The calculated results show that the different types of impervious layer have no impact on the temperature distribution of dam. However, the thickness of impervious layer has greatly influenced the temperature distribution of dam, and a conclusion can be drawn that the middle thickness from 3 to 5 m of SGRCC impervious layer can meet the demand of temperature control for third grader roller compacted concrete (TGRCC) dam.