Core samples can be considered acceptable so long as:
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They are transported in watertight containers and cure at least 48 hours prior
to breaking
,Air-entraining admixtures must conform to:
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ASTM C260
A beam is primarily subject to _____ while a column is primarily subject to ______.
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Flexure, compression
Air content required for a 5,000 psi, 3/8 inch aggregate mix of concrete exposed to very
severe cycles of freezing and thawing is:
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7.5%
The welding of intersecting cross bars when erecting reinforcing steel should
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, Never be permitted unless authorized by engineer
Placement tolerances of #8 bars within a 24 inch thick footing are:
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+/- 1/2 an inch
An ASTM A615 #7 bar has the diameter of
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7/8 of an inch (#22)
Concrete with the most severe sulfate exposure will be in contact with a percentage of
soil containing water-soluble sulfate:
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Greater than 2.00
When using and removing formwork, the contractor should:
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They are transported in watertight containers and cure at least 48 hours prior
to breaking
,Air-entraining admixtures must conform to:
Give this one a try later!
ASTM C260
A beam is primarily subject to _____ while a column is primarily subject to ______.
Give this one a try later!
Flexure, compression
Air content required for a 5,000 psi, 3/8 inch aggregate mix of concrete exposed to very
severe cycles of freezing and thawing is:
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7.5%
The welding of intersecting cross bars when erecting reinforcing steel should
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, Never be permitted unless authorized by engineer
Placement tolerances of #8 bars within a 24 inch thick footing are:
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+/- 1/2 an inch
An ASTM A615 #7 bar has the diameter of
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7/8 of an inch (#22)
Concrete with the most severe sulfate exposure will be in contact with a percentage of
soil containing water-soluble sulfate:
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Greater than 2.00
When using and removing formwork, the contractor should:
