Placement of Mass Concrete for Cast-in-Place Concrete Piling: The Effects of Heat of Hydration of Mass Concrete for Cast-in-Place Piles

摘要

This report describes models, ABAQUS and Schmidt, to predict the peak temperature in the center of cast-in-place concrete piling. Five concrete piles with varying diameters and made up of concrete mixes with different percentage of fly ash are used. The temperature profiles predicted using the finite element program, ABAQUS, are compared to temperatures predicted by the step-by-step method, ACI 207 Schmidt model. The results show that the ABAQUS model correlates better to experimental results and yields better predictions of the temperature profiles than the Schmidt model. The latter is faster to run but overestimates the peak temperature. Using the results from the ABAQUS model, a specification can be recommended that will result in acceptable concrete for large CIDH piles in the range of 6 to 14 feet in diameter.