| The objective of this study is to investigate the creep behavior of high-performance concrete (HPC) in the following areas: (1) Creep recovery of HPC loaded at normal (early) ages and unloaded at very old ages, (2) Creep of HPC loaded at very old ages, (3) Comparison of different creep prediction models with long-term creep test data on HPC (creep of HPC of normal loading ages), and with the results of the experimental work of this project (creep of HPC at old ages).; It has been found that HPC has virtually no creep recovery at old unloading ages when loading started at normal early ages, which also means the principle of superposition is invalid for old HPC. The Dilger Model which was formulated for predicting creep of HPC, works very well for HPC loaded at normal ages, although modifications are needed in order to make it agree with test results on creep of HPC at very old ages. (Abstract shortened by UMI.)... |
