A study of the mortar making qualities of Illinois sands . specific gravity is , the weight per lb., and the percentage of voids •Sample No. 11. (Fig. ii.) This is alsoa bar sand from near Alton. It is brownishgray in color and contains some flint and lime-stone. There is also a small amount of coaland cinders present, probably as the result oftransportation. The finer grains are wellrounded but the coarser grains are more angu-lar than usual. The sieve analysis (see FIG. FIG. 11, 54. Plate 11) shows this 3and to be quite fine, ^^ passing sieve. The amoun
A study of the mortar making qualities of Illinois sands . specific gravity is , the weight per lb., and the percentage of voids •Sample No. 11. (Fig. ii.) This is alsoa bar sand from near Alton. It is brownishgray in color and contains some flint and lime-stone. There is also a small amount of coaland cinders present, probably as the result oftransportation. The finer grains are wellrounded but the coarser grains are more angu-lar than usual. The sieve analysis (see FIG. FIG. 11, 54. Plate 11) shows this 3and to be quite fine, ^^ passing sieve. The amount of suspended matter is 0,2%, the specif-ic gravity , the weight per cu. ft. lb., and the per-centage of voids Sample No. 12. (Fig. 12.) This sand,used in large quantities in and about the cit-ies of Champaign and Urbana, is a bank sandfrom along the Wabash River near Covington, Ind*It is of a yellowish gray color and containssome flint, limestone and shale. The grains are well rounded. The sieve analysis (see FIG. 12. Plate 12) shows this sand to be fairly well graded and rather coarse, the excess of material being betweenthe and sievos. There is ^ of suspended roatter,principally clay which does not adhere to the grains. The specif-ic gravity is , the weight per cu. ft. lb., and thepercentage of voids • Sample No. 15. (Fig. 13.) This is abank sand from near Gladstone. It is gray incolor and contains some granite and grains are
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, bookyear1910
