PROPERTIES OF PORTLAND CEMENT. PART III. 



233 



CUm^R AS R£C5/VfD. 



°\o PI as 



J5 



JU 



l?0 



ISO 



180 



CL/m^R AERATED 3 MONT/IS IN LABORATORY. 



170 ISO 



180 



CLINKER WE AT ME RED 3 MONT/13 0OT3/DE 



20 



30 



O 60 120 150 



, , ^ TIME IN MINUT5S, 



(MAX )=M<iximum Retardation. 



Fig. 19. 



