Defect of cement. 
Too low i in initial tensile strength. 
Se 
“Too | low i in final tensile strength or -show- 
ke ing: a deterioration 1 in n strength. 
Correction. . 
Increase lime content and grind raw mix 
finer, or increase alumina somewhat 
grind clinker finer. 
Increase silica in clay base. 
