Leaching Modeling and Evolution of pH in Cementitious Materials of Radioactive Waste Repository Facilities

Abstract

This paper covers required functions and performance with regard to the performance evaluation of cementitious materials over an ultra-long term on the order of 10,000 years, discusses the need for leaching modeling and aqueous alteration evaluation of cementitious materials, and presents concepts. The positioning of leaching modeling and the state of knowledge about the aqueous alteration of cement hydrates based on a survey of the existing literature are described. Further, the results of an investigation of concrete structures in long-term contact with water, and the results of accelerated leaching tests and electrical migration tests are reported.