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Assignment of PCC deisgn

1)The field mix proportions using the data below:

Concrete is used for pavement-mild exposure

Specified compressive strength of concrete = 3,000 psi

Cement: Type I, no air-entrained mixture

Nominal maximum size of coarse aggregate = 1.0 in.

Items measured

SG of CA

MC of CA

Abs. % CA

SG of FA

Dry-rodded weight of CA

MC of FA

Abs.% FA

Fineness modulus of FA

Values

2.65

2.1%

0.9%

2.68

1001b/ft³

3.0%

0.4%

3

2) The weights of the materials (cement, CA, FA and water) for a batch

producing three cylinders (6"x12") (assume with a margin of 30%)

Fig: 1