1990/01/01 by A. Atkinson, J. A. Hearne, C.F. Knights +1 · 1 citation
Chemistry · Engineering · Environmental Science · #Aluminium #Amorphous solid #Aqueous solution #Cement #Cementitious #Chemical engineering #Chemistry #Crystallography #Materials science #Metallurgical Processes and Thermodynamics #Metallurgy #Mineralogy #Minerals Flotation and Separation Techniques #Physical chemistry #Portland cement #Solid solution #Thermodynamics
paper · doi:10.1557/proc-212-395
crossref issued 1990/01/01 · crossref published 1990/01/01 · crossref published-print 1990/01/01 · openalex publication_date 1990/01/01 · crossref published-online 2011/02/28 · crossref created 2011/03/06 · crossref deposited 2021/02/24 · crossref indexed 2022/04/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/26
ABSTRACT The chemical properties of the CaO-Al 2 O 3 -SiO 2 -H 2 O system are important for understanding and predicting the behaviour of Portland cements in cementitious wasteforms and radioactive waste repositories. Solids of known average composition in this system have been synthesised by the co-hydrolysis of mixed alkoxides. The solids have been equilibrated with water at 25°C and the composition of the aqueous phase characterised. A thermodynamic model for the system has been developed by extending an earlier model of solid solutions in amorphous gels to include aluminium compounds. The model accounts for most of the experimental data and predicts that the main influence of aluminium is to form a hydrogarnet solid solution of general composition C 3 AH 6−2x S x The model can be used to predict the chemistry of hydrated cements and the interaction of cements with groundwaters.