Pore solution composition of calcium sulfoaluminate cement

The chemical compositions of the pore solution expressed from commercial ca lcium sulfoaluminate-belite cement paste at selected intervals of 1, 3, 7, 14, 30 and 60 days, cured at 20 degrees C, have been determined, pH was mea sured in the range 12.8-13.1, changes in concentrations of Na, K, Ca, Al, S i, CI, Br and SO42- were determined between I and 60 days of curing. The ma in components in the pore solution were Al and K: Na, Ca, CE, Br and SO42- concentrations were low, and the Si concentration was below the detection l imit. Potassium is slowly sorbed by the solids, and its concentration passe s through a maximum at similar to 3 days.