jismart2019041: A Study on durability properties of Concrete with Admixture as A Part of Cement or Fine Aggregate

Abstract

In the Japanese construction industry it is important to replace industrial byproducts such as fly ash and blast furnace slag fine powder with cement. We think that it is one of the effective methods of resource saving and energy saving type environment reduction. In this study, it is necessary to clarify the influence of replacement rate on the curing characteristics of concrete and the environmental load reduction effect due to the use of admixture by dividing admixture into inner and outer parts. And, we aimed to examine the past prediction formula and the experimental result in this experiment. It was confirmed that with the age of 91 days, the pozzolanic reaction of the fly ash gave almost the same strength as concrete without fly ash. Regarding dry shrinkage, focusing on the FA series, the shrinkage rate was suppressed more than concrete without fly ash at all substitution ratios for both inner and outer division. Focusing on the BS series, contrary to the FA series, it was confirmed that shrinkage distortion is suppressed when the replacement ratio increases for both the inner and outer compartments. Regarding the measured and predicted values of unit creep strain, it was confirmed that the AIJ equation is the most adaptive in the preparation of concrete without fly ash.