ABSTRACT
Abstract In this paper, the effect of length and configuration of specimens and restraint steel areas on autogenous shrinkage stress were investigated. Based on measured distributions of steel strain, anchorage length and configuration of specimen were discussed. Shrinkage stress of concrete was 2.24 N/mm2 at 28 days, which was 0.44 of split tensile strength, when using a deformed bar 32 mm in nominal diameter as the restraint steel bars. Anchorage length was 30 cm, so specimen length of 1m in this test was considered long enough to be used. Shrinkage stress in specimens with enlarged section in anchorage zone was greater than in specimens with uniform section. Theoretical values calculated by an iterative approach method showed a good agreement with experimental data. Keywords: Autogenous shrinkage, shrinkage stress, restraint test, configuration of specimens, creep analysis, degree of restraint.
