Concrete with Addition of Super Retarder and its Practical Use for Pier Foundation

Abstract

This paper report the charactalistics of super retarder added concrete and outline the pier construction for Sophia University Central Libraly in Tokyo. These piers were constructed by means of reverse circulation method or “TBW” process. And into each pier concrete, steel column to support floating slab had to be settled immedietly after concreting. In order to plumb each steel column and keep it in position, concrete require high workability and rigidity. Therefor most effective admixture contents at various concrete temperature were decided through pre-construction experiment and we have aquired desirable result in the actual construction.