Dissolution phenomena of CaO-SiO2-H2O gel at Ca/Si>1 coexisting with ettringite system

We have studied the influence of interaction between CaO-SiO 2 -H 2 O (C-S-H) gel and ettringite (AFt) on their dissolution regarding the initial chemical feature of degraded, cement pore water. In this work, firstly dissolution experiments were performed in C-S-H gel at Ca/Si=1.0, 1.2 and 1.47 coexisting with AFt of which amount was 5% of mol corresponding to each C-S-H gel. Secondly, assuming the congruent dissolution of AFt, dissolution of the same system was calculated by combining with the dissolution model of C-S-H gel at 1

Keywords:

• Nuclear chemistry
• Dissolution
• Solubility
• Chemical reaction
• Ettringite
• Analytical chemistry
• Portland cement
• X-ray crystallography
• Chemistry
• Solid solution
• Calcium oxide

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