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14: Know and Understand
Which of the following is not a characteristic of concrete?
A. Relatively inexpensive.
B. Fire resistant.
C. Low compressive strength.
D. Good tensile strength (with reinforcement materials).
What are the three distinct phases of concrete hydration?
What are some examples of course aggregates that can be used in making concrete?
What is the effect of adding an accelerating admixture to concrete?
What is the bearing capability of soil and why is this measure important to a builder?
What is the best way to estimate the amount of concrete needed for a project?
What is the common recipe or mix for creating concrete?
Why is it important to know the amount of water in sand that will be used to make concrete?
What are traditional and current recommendations for vapor barriers used with a concrete slab?
Tensile strength of concrete can be improved by placing wire mesh or _____ in the forms before the concrete is poured.
Why should bleed water be allowed to evaporate before final finishing of concrete takes place?
What are some examples of flatwork applications where the concrete may have a broom finish?
In what areas or situations is a slab-on-grade foundation typically used?
Where are pier footings for a foundation generally used?
What are some characteristics of good concrete forms?
Describe how an overlapping grid of rebar is placed to strengthen concrete.
Explain how to begin placing concrete in a form when rebar is used.
What are two methods that may be used to control the initial curing of concrete?
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