1993 Volume 31 Issue 9 Pages 18-27
In Japan, cement companies have produced three types of clinker for ordinary, early high strength and moderate heat portland cement for many years. These clinkers have been ground with gypsum and/or mineral additives such as blastfurnace slag and fly ash, and supplied in aforesaid portland cements and blended cements. In recent years, however, concrete constructions have become larger and higher and are demanding high performance concrete with lower heat, far greater workability, high strength and durability. With these points as background, research and development on belite portland cement, in which more belite is contained than in moderate heat portland cement, is being carried out and its effectiveness on thermal, rheological and strength properties is being recognized. The basic properties of belite portland cement are explained here and its quality as cements for low heat and super workable high strength concrete is introduced, together with its application to actual constructions.
