Table below shows the result of sieve analysis test on a sample of fine aggregate. What is the fineness modulus for this aggregate? Sieve size, mm 9.5 4.75 2.36 1.18 0.6 0.3 0.2 0.15 Percent passing 100 89 61 29 18 14 10 9

Referring to the aggregate gradations A, B, and C in Figure P5.26, answer the following questions: a. What is the maximum size of each gradation? b. What is the nominal maximum size of each gradation? c. Classify each gradation as dense, open, or gap indicating the reason for each classification. 100 A 80- 60 40 0.075 0.30 1.18 2.36 4.75 9.5 12.5 19.0 25.0 0.15 0.60 Sieve sizes (mm) FIGURE P5.26 Percent passing 20

Coarse aggregate is placed in a rigid bucket and compacted with a tamping rod to determineits unit weight. The following data are obtained:• Volume of bucket = 0.5 ft3• Weight of empty bucket = 20.3 lb• Weight of bucket filled with dry compacted coarse aggregate = 76.8 lba) Calculate the dry-compacted unit weight of the aggregate.b) If the bulk dry specific gravity of the aggregate is 2.620, calculate the percent voids.

Void Content—Calculate the void content in the aggregate using the bulk densitydetermined by either the rodding, jigging or shoveling procedure, as follows:

Sieve analysis of a sample of fine aggregate resulted in the following data   No. Sieve number  4 8 16 30 50 100 Sieve opening (mm) 4.75 2.36 1.18 0.6 0.3 0.15 Weight retained (g) 13 75 120 126 105 61     A) The total weight of the sample, assuming no mass loss during the analysis, is______ (g) a) 505; b) 500; c) 550   B) The half sieve used in the experiment is________. a) No.8; b) No.50; c) none of the above   C) The fineness modulus of the aggregate________. a) 6.13; b) 3.16; c) 1.36   D) The average size of the aggregate___________. a) No.30; b) No.4; c) No.16