ABSTRACT
Currently, admixtures that have an inhibitory effect against alkali-silica reaction (ASR) are stipulated as a measure to suppress ASR in new structures. One of the admixtures is blast furnace slag fine powder (BFS), but there have been cases where ASR occurred despite using concrete to which BFS was added. Further studies are needed on the ASR-suppressing effects of BFS. Therefore, in this study, the expansion and the decreasing rate of the strength characteristics was discussed. In the experiment, the expansion rate of concrete under different curing environments was measured by the concrete prism method with the addition rate of BFS as a parameter. In addition to clarifying the correlation between the addition rate of BFS and temperature, the spatial distribution of the gel generated around the aggregate was evaluated by the gel fluorescence method for specimens with remarkable expansion.
