BEHAVIOR OF CA(OH)(2) IN THE PRESENCE OF THE SET STYRENE-ACRYLATE DISPERSION

The action of the saturated Ca(OH)(2) solution on the surface of the s et styrene-acrylate dispersion was studied by scanning electron micros cope and infrared spectroscopy. The slices of the set dispersion were immersed into the saturated Ca(OH)(2) solution. Action in such conditi ons on and near to the set dispersion surface was investigated in comp arison with that in the saturated Ca(OH)(2) solution. The obtained res ults indicate, that first spherical and globular Ca(OH)(2) particles a rise in the form, of long fibres and of cluster habits on the set disp ersion surface. Ca(OH)(2) is converted continually to the carbonate ph ase. The carbonate crystallization proceeds first through the aragonit e-like and lately through the calcium-like carbonate rise. It is suppo sed, that air voids formed in the set dispersion surface serve as the CO2-giving supplies, in which the carbonation proceeds preferentially compared to the Ca(OH)(2) solution. Copyright (C) 1996 Elsevier Scienc e Ltd