WASHING AND GRADING SAND FOR CONCRETE. XV. 
M.8.WS 4 S 
TENSILE STRENGTH IN LBS PER S@ IN 
“er2e | 3 6 9 T2 
MAYS MONTHS 
The Melbourne and Sydney experiments should be 
accepted as conclusive proof of the superiority of bluestone 
dust to sand for use in concrete. 
It may be of interest to give the results of washing and 
otherwise preparing two samples of crushed sandstone at 
the Water and Sewerage Board’s testing room. 
