A study of the mortar making qualities of Illinois sands . FIG. 40. principal ones aro quartz, flint, limestone, granite, oandatone,shale, cinders, and coal. The last two are present to such anextent as to indicate that their presence is due to some othercause than transportation. There is barely a trace of suspendedmatter. The sieve analysis (see Plate 22.) shows this sand to bequite fine, ^ passing the sieve. The specific gravityis , the weight per cu. ft! lb., and the voids ^. Sample No. 25. (Fig. 23.) This is abank sand from limted but fairly uniform de-posits
A study of the mortar making qualities of Illinois sands . FIG. 40. principal ones aro quartz, flint, limestone, granite, oandatone,shale, cinders, and coal. The last two are present to such anextent as to indicate that their presence is due to some othercause than transportation. There is barely a trace of suspendedmatter. The sieve analysis (see Plate 22.) shows this sand to bequite fine, ^ passing the sieve. The specific gravityis , the weight per cu. ft! lb., and the voids ^. Sample No. 25. (Fig. 23.) This is abank sand from limted but fairly uniform de-posits near Paris. As shown by the sieve an-alysis (see Plate 23) this sand is very fine,^ passing the sieve, there beingbut an occasional large grain. It is very light yellow in color and contains some lime- FIG. 23. stone and chert with ^ of suspended matter. The grains are all well rounded. The specific gravity is ,the weight per cu. ft. lb., and the percentage of voids Samplo No. 24. (Fig. 24.) This is a banksand from limited but vary un
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, bookyear1910
