自密实高性能混凝土短期高温徐变性能试验研究

hermal strains of self-compacting concrete with addition of polypropylene fiber (PPF) at different stress levels and temperatures were studied in this paper. Experiments of short-time creep strain at constant temperature and load were performed at high temperature. The influence of temperature and stress level on short-time creep strain was investigated based on the results of experiments. And the mechanism behind the short-time creep was discussed. The results offer a theory and test basis for the constitutive model of self-compacting concrete under high temperature, and design and analysis of self-compacting concrete structure.