2020-2021 Flashcards
Which of the following is the basic definition of concrete
Artificially made rock
The capacity of a material to withstand pushing forces such that when exceeded the material is crushed is known as the material’s______.
Compression strength
The force of pressure applied to a material such that when exceeded the material fails by splitting in two with the parts sliding past each other is known as the material’s_______.
Shear strength
Concrete that will be subjected to tension must be _____.
Reinforced
Concrete is strong in ______.
Compression and shear, but weak in tension
What is the term for the weight of all moving and constantly acting loads?
Live load
The resistance to sliding between concrete and steel is known as____.
Bond
The phrase ?0Ò hydraulic cementing material?1Ó means that the material _____.
Hardens under water
How long has concrete been used as a building material?
Over 2000 years
Reinforcing steel is a product resulting from processing and reprocessing of _______.
Iron ore
The tensile strength of steel reinforcing bar is approximately
75000psi
Which of the following is the point at which, when reinforcing steel is pulled, the bar will begin to lengthen with very little increase in pull.
Yield point
What is the minimum yield strength of grade 60 bars?
60,000 psi or 420MPa
Which type of folding rule is preferred.
Inside reading
What size wire is used to tie most rebar
16
