10. Concrete Construction Flashcards

1
Q

___ is the hardest form of cement produced from Portland cement, coarse and fine aggregates, and water

A

Concrete

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2
Q

___ can help tailor a bath of concrete for specific function

A

Admixtures

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3
Q

Vertical reinforcing bars are known as ___ and are provided to resist the diagonal tension

A

Stirrups

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4
Q

The technique of ___ is a more efficient use of concrete then ordinary reinforcing

A

Prestressing

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5
Q

Properly cured concrete continues to harden indefinitely at a gradual rate, normal design strength is reached after __ days

A

28

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6
Q

$$$

The single most important factor in determining the ultimate strength of concrete is the ___ to ___ ratio

A

Water to cement

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7
Q

Hardening of concrete involves a chemical process known as

A

Hydration

Between 50 and 70 F

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8
Q

$$$

The ___ test uses a standard size cone shaped mold and a sample of wet concrete

A

Slump test

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9
Q

Because concrete has relatively good insulating properties, it tends to retain the heat of an exposing fire and release it slowly, in an effect referred to as the___

A

Heat sink effect

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10
Q

$$$

Supports for precast beams may include ___ cast into the columns

A

Corbels (brackets)

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11
Q

Produce a make sure that flows more freely

A

Superplasticizers

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12
Q

Like masonry, concrete is strong and compression but weaker in __

A

Tension

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13
Q

Concrete beams are frequently cast in the shape of a

A

Tee T

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