A study of the mortar making qualities of Illinois sands . It is quite uniform in quality andhas been used a great deal in pavement found-ations and brickwork but has been consideredunfit for concrete on account of its dirtycondition. It actually contains ^ ofsuspended matter, but the tensile tests (see Table 1, pp. 44.) shows that it makes a stronger mortar than sev-eral of the very cleanest sands tested. It is fairly well gradedas shown by the sieve analysis (see Plate 7.) and is rather coarse,^ passing the sieve. The specific gravity is , theweight per cu. ft. lb. an
A study of the mortar making qualities of Illinois sands . It is quite uniform in quality andhas been used a great deal in pavement found-ations and brickwork but has been consideredunfit for concrete on account of its dirtycondition. It actually contains ^ ofsuspended matter, but the tensile tests (see Table 1, pp. 44.) shows that it makes a stronger mortar than sev-eral of the very cleanest sands tested. It is fairly well gradedas shown by the sieve analysis (see Plate 7.) and is rather coarse,^ passing the sieve. The specific gravity is , theweight per cu. ft. lb. and the percentage of voids •. Sample No. 8. (Fig. 3.) This is abank sand from near Rockford. The deposits are large and quite uniform in quality. The o sand is light gray in coir and contains oon- A siderable chert with some limestone and sieve analysis (see Plate 8) shows it tobe fairly well graded. The amount of sus-pended matter is ^, the specific gravity , the weight per cu. ft. 113. lb., and the percentage ofvoids. •. FIG. 8. 33,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, bookyear1910
