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Concrete Mix Design

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Hi everyone,

There are 3 concrete mix design samples, all have same
AMOUNT of cement, water, fine aggregate (in VOLUME),
coarse aggregate (in VOLUME), etc., except that
SAMPLE A: well-graded combination of max. 1" crushed
rock coarse aggregate
SAMPLE B: well-graded combination of max. 3/8" crushed
rock coarse aggregate
SAMPLE c: max. 3/8" pea gravel coarse aggregate

Question:
1. Which one is cheapest in cost? and the next?
2. Which one is strongest (in compression)? and the
next?
3. Which one will shrink least? and the next?
4. Which one is the structural engineer's best choice?
and the next?

Thanks for your opinion,

James Lin
IDS, Inc.

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