A treatise on concrete, plain and reinforced : materials, construction, and design of concrete and reinforced concrete; 2nd ed. . Fig. 55.—Compressive Strength in Poundsper Square Inch of Mortars vrithVarious Mixtures of Sand, after OneYear in Fresh Water. Proportions100 lb. Portland Cement to cu. Sand. {See p. 148.) Fig. 54.—Compressive Strength in Poundsper Square Inch of i: 3 (by Weight)Mortars \vith Different Mixtures olSand, after q Months in Air and 3Months in Sea Water. {See p. 148.)

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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1912