Abstract
The test basis is provided for the development of high performance concrete of metakaolin through studying the performance of metakaolin in high performance concrete, which is to meet the demand of high performance concrete in modern industry. The experiment shows that the incorporation of metakaolin has a great influence on the strength of concrete. The compressive strength of concrete increases with the increase of the content of metakaolin. And the strength increases slowly as the content is more than fifteen percent. From the overall test data, the strength of 3 days is not very stable. But the strength of 7 days and 28 days can be increased about 20%, and the effect is significant. It can be sure that the optimum content of metakaolin in the concrete is 15% of the cementitious material. The durability of concrete mixed with kaolinite is better than that of non-adobe kaolin concrete. The metakaolin has abilities to improve the strength and compactness of concrete, to improve the frost resistance of concrete and impermeability and the resistance to chloride ion permeability. According to the advantages of metakaolin concrete in durability, the application of it to roads, bridges and water conservancy projects in the South - to - North Water Diversion Project is generalized to provide a broad prospect for the utilization of metakaolin. And it is also imperative to bring considerable social and economic benefits.
