Abstract
Three types of high-strength and high-fluidity concrete and two types of lightweight high-strength and high-fluidity concrete with an artificial aggregate were prepared under a wide variety of placement conditions such as interval, ambient temperature, rodding and curing. Flexural strength and accelerated carbonation test were then performed with prism specimens having a placing-joint in each of them. Effects of causes of the cold joint on the flexural strength and carbonation depth of the placing-joints were discussed. Next, the limitations of placing interval was also investigated in terms of the multiple regression analysis and a limitations of placing interval for high-strength and high-fluidity concrete was proposed.
