2025 Volume 36 Pages 27-36
In this study, we investigated the influence of the type of post-added chemical admixture on the properties of plasticized concrete controlled by slump flow. The change in slump flow (SF) over time was smaller for chemical admixtures with a smaller SF increments per addition ratio, and setting time tended to be delayed as SF increments from the base concrete increased. In this experiment, the plastic viscosity of mortar taken from plasticized concrete was higher when using admixture including viscosity agents (VSP, VSPF). Additionally, it may be possible to secure frost resistance by increasing the air volume after plasticization to 5% or more, or by using a post-added admixture that includes an air-entraining agent.
