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A concrete mix design is needed for a residential street paving project in Detroit, Michigan. Pavement...

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Civil Engineering

A concrete mix design is needed for a residential street pavingproject in Detroit, Michigan. Pavement thickness is 8”,unreinforced, subjected to freezing and thawing and deicing agentsare anticipated. The specified compressive strength is 4000 psi.Assume both Fine Aggregate (FA) and Coarse Aggregate (CA) are insaturated surface dry condition.

Specific Gravity of Fine Aggregate (FA) = 2.71

Fineness Modulus (FM) of Fine Aggregate (FA) = 2.70

Specific Gravity of Coarse Aggregate (CA) = 2.65

Bulk Density of Coarse Aggregate (CA) = 105 pcf

Nominal Maximum Size of Coarse Aggregate = ¾”

Specific Gravity of Cement = 3.15

Fill in ALL boxes in the tables below:

Slump (Table 9-6)

3''

Maximum size of aggregate (Page 152, 2ndParagraph)

3/4

Air entrainment (Yes/No)

yes

Air content (Table 9-5)

6%

Required Compressive Strength (Table 9-11)

5200

w/c ratio (Table 9-3)

0.42

Material

Weight (lbs)

Volume (ft3)

Water (Table 9-5)

295

Cement

CA (Table 9-4)

1956.15

FA

Air

Total

Answer & Explanation Solved by verified expert
4.2 Ratings (583 Votes)
Ans Let the total volume of trial mix be 1 cubic yard 27then according to ACI 211191 Table 631 slumprequired for pavement and slab is 1 to 3 inAns Maximum size of aggregate is equal to nominal maximum size 34 inAns Since concrete is exposed to freezing and thawing anddeicing agents yes air entrainemet should presentAns According to ACI    See Answer
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