The ability of PC grout to fill voids is an important property which governs the durability of a prestressed concrete structure. It cannot be said, however, that voids are always completely filled in actual constructions, and it is necessary for research work to be done to develop a high-quality PC grout. In the present study, therefore, retarded-foaming type aluminum powder, super-plasticizer, and segregation-inhibiting water-soluble high polymer were used as admixtures, while combinations of various types of cement, flyash, and silica fume were made and the qualities of the mixes were compared.
This report is on the results of laboratory tests which indicate the direction to be taken for PC grout of more complete void-filling capability.