CHEMICAL-MODEL FOR THE CARBONATION OF A GROUT WATER SLURRY

A series of experiments were undertaken to examine the effects of carbonation on the chemical composition of water in a grout/water slurry. Powdered grout samples were reacted with deionized water in sealed flasks. Progressive carbonation was induced by adding known weights of CO2 to the slurries at various times. Solution samples were withdrawn several days after each addition of CO2, filtered, and analyzed for major ions. A chemical equilibria model was used to simulate the reactions between water and grout during progressive carbonation. The equilibria model provides a good representation of the experimental data. Disparities between the simulated and experimental results provide important information on the inadequacies of the physico‐chemical model and suggest areas for further research to improve the description of chemical equilibria in cement/water systems. Copyright © 1990, Wiley Blackwell. All rights reserved