Report on the building and ornamental stones of Canada (1912)
Parks, William A, Canada. Mines Branch · Ottawa : Dept. of Mines · leaf 204
a little hornblende and minute grains ofmagnetite. Corrosion produces no appreciable change in colour.The physical properties are:— Specific gravity 2. 789 Weight per cubic foot, lbs 171.363 Pore space per cent 0.432 Ratio of absorption, per cent, one hour 0.133 two hours 0.133 ,low immersion 0.133… … Robeival Blue Granite. Berniers quarry, Roherval, Que. 145 Crushing strength, lbs. per sq. in., dry 28,150. wet 23,100. wet after freezing.. . Transverse strength, lbs. per sq. in Shearing strength, lbs. per sq. in Loss on corrosion Drilling factor, mm 22,290.1,810.1,305.0,000 5.7 Two horse…
Building stones
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