10. Concrete Construction Flashcards
___ is the hardest form of cement produced from Portland cement, coarse and fine aggregates, and water
Concrete
___ can help tailor a bath of concrete for specific function
Admixtures
Vertical reinforcing bars are known as ___ and are provided to resist the diagonal tension
Stirrups
The technique of ___ is a more efficient use of concrete then ordinary reinforcing
Prestressing
Properly cured concrete continues to harden indefinitely at a gradual rate, normal design strength is reached after __ days
28
$$$
The single most important factor in determining the ultimate strength of concrete is the ___ to ___ ratio
Water to cement
Hardening of concrete involves a chemical process known as
Hydration
Between 50 and 70 F
$$$
The ___ test uses a standard size cone shaped mold and a sample of wet concrete
Slump test
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___
Heat sink effect
$$$
Supports for precast beams may include ___ cast into the columns
Corbels (brackets)
Produce a make sure that flows more freely
Superplasticizers
Like masonry, concrete is strong and compression but weaker in __
Tension
Concrete beams are frequently cast in the shape of a
Tee T
