Evaluation of ISO Long-Term Leach Data for Concrete Using Least-Squares Refinements of Parameters in a Simple Empirical Model

摘要

Leach data reported previously for cesium in concrete at room temperature have been used in least-squares refinements of the parameters a, b and c in the empirical model Q = a(tsup(b)-c) where Q is the total amount leached after time t. Systematic differences between the experimental and the calculated values were observed for the data obtained during the first few days. This contributed somewhat to the root mean square difference between the observed and calculated values which was finally about 25%. The values obtained for the parameters deviate substantially from those expected for a simple linear diffusion model. No interpretations are made as to the nature of the relevant mechanisms, but it can be concluded that the computer program and procedure used are suitable for such model studies. (Atomindex citation 13:695003)