Solubility relationships between Friedel's salt and hydroxy AF, suggest an essentially complete solid solution with only minor discontinuities. Solid-aqueous partitions were determined by equilibration of 11 compositions at 10 mol % intervals at similar to 20 degrees C in experiments of 6-17 months' duration. Aqueous chloride concentrations >2mM, approximately, are required to incorporate significant Cl in hydroxy AF(m); the process is complete, giving essentially pure Friedel's salt, at a chloride content of similar to 14 mM. The self-generated pH of the solid solutions are high: pH >12 for all compositions. The implications for diffusion of chloride ions through cement paste are discussed. (C) 1998 Elsevier Science Ltd.
|Number of pages||11|
|Journal||Cement and Concrete Research|
|Publication status||Published - 1998|