Hydration and hardening process in 3CaO center dot Al2O3-CaSO4 center dot 2H(2)-plasticizer admixtures-water system

The hydration and hardening processes in C(3)A-C (S) over bar H-2-H system have been investigated in the presence of some plasticizer admixtures, like calcium lignosulfonate (LSC) and melamine formaldehyde sulfonated (MSF)-VI MC-11, condensates added in proportion of 0.1% to 1% solid substance. These plasticizer admixtures influence the kinetics of the hydration processes, the evolution of the hydrocompounds and formation of the hardening structur e in the C(3)A-C (S) over bar H-2-H system, in correlation with their propo rtion in the system and with the considered length of hardening. As a resul t of the manifestation of two different influences of the plasticizer admix tures upon the hydration and hardening precesses - a delaying action, gs a result of their adsorption on the surface of the anhydrous and hydrocompoun ds particles - and an intensifying action of the processes from the system, as a stronger dispersion of the particles in aqueous medium was pointed ou t also for the C(3)A-C (S) over bar H-2-H system.