Thermal strains,free thermal strain and short-time creep strain of self-compacting concrete(SCC) with addition of polypropylene fiber(PPF) were studied.Physical and chemical changes and microstructure during heating in concrete were studied by differential thermal and thermo gravimetric analysis,scanning electron microscopy and mercury instruction porosimetry.The influence of temperature and stress level on transient strain was investigated.Regular pattern and mechanism of transient strain were studied base...