An aggregate sample was sieved with the following percent passing results: 100%

Question

An aggregate sample was sieved with the following percent passing results: 100% for 1.5-inch sieve, 95% for 1-in sieve, 81% for Y*-in, 56% for 3/8-inch, 44% for No. 4, 26% for No.30, 0.8% for No.200 sieve According to the traditional definition, the maximum aggregate size is A) 9.5 mm B) 19 mm C) 25 mm D) 37.5 mm According to the traditional definition, the nominal maximum aggregate size is A) 9.5 mm B) 19 mm C) 25 mm D) 37.5 mm The percent of deleterious material in the aggregate is: A) 0.8% B) 26% C) 44% D) 55%

Explanation / Answer

7) Max aggregate size is the size of the aggregate of maximum size present

Max aggregate Size is 1 in = 25 mm.

8) Nominal max aggregate size is the size of the first sieve through which less than 90% passes

Nominal max aggregate size is 3/4 in = 19 mm

9) Deleterious material is percentage passing No. 200 sieve

Deleterious material is 0.8%

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