70 Rankin and Wright — Ternary System CaO-Alfi^-SiO^. 



reactions to go to completion. In the problems to which we 

 wish to apply this diagram, we know that the reactions involved 

 are not always completed, that equilibrium conditions are not 

 attained. It does not follow, however, that this diagram is 



Fig. 19. 



CS 



m 3 



JS. 

 CAS, 



US; 



C 3 S 2 ; 



C 2 S; 



C 3 S; 



C 3 S 

 C 3 A 



C 3 S 2 

 C 2 S 



£1 

 C 3 S 2 



i& 



iA& 



f~ 



C,S 



s 3 s 



vC 3 A N 



Ci 



US, 



JCaAl 



_C 2 Ai. 

 C 2 S 



-CiS 2 



?AS. 



£AS 2 _ 



C 2 S 

 C 3 A 

 vC 5 A a 



^A 

 C,S 



C 5 A, 



CA 



&AT 



CA 



Ms 



JUA1 



C 3 A 5 



C 3 A 



C 5 A 3 



CA 



C 3 A 5 



Fig. 19. Diagram to show final products of crystallization of solutions 

 of CaO, A1 2 3 and Si0 2 . 



worthless in its application to such problems. On the contrary, 

 it simply means that this diagram must be studied in order to 

 determine the possible conditions which may exist if equi- 

 librium is not reached. For example, if one possessed a charge 

 of material whose CaO, A1 2 3 , Si0 2 content approximated that 

 of some point within the diagram tig. 19, one might expect 

 that the compounds of these three oxides present would be, to 



