抄録
This study focused to clarify the status of drying shrinkage in ready-mixed concrete via field study using simplified drying shrinkage testing method, which has not been sufficiently examined. The field study results revealed that significant variation in drying shrinkage properties for ready-mixed concrete. Furthermore, stochastic investigation for the field data demonstrated dominant influence of coarse aggregate type on drying shrinkage compared with other parameters like unit water content and led to establishing simple formula for predicting drying shrinkage. These results also inferred the risk in exaggerated expectation to restrict drying shrinkage only by selecting coarse aggregate type due to wide variety of drying shrinkage behavior among identical coarse aggregate type. Finally, mixing usage of multiple aggregate types was depicted effective via experiment to practically limit drying shrinkage.
