Reinforced concrete Flashcards
1
Q
How is reinforced concrete made?
A
> steel bars are inbedded in concrete at locations exposed to tension
2
Q
What kinds of bars are good for reinforcing concrete?
A
> ribbed bars with rusty surfaces=good mechanical bond, but ends must be covered to prevent corrosion
3
Q
What is pre-stressing?
A
> puts the reinforced region under COMPRESSION-tensile loads must overcome these internal stresses before concrete experiences tension
allows longer spans with reduced thicknesses, reducing cost
4
Q
What is pre-tensioning?
A
> pouring concrete around high yield-point steel tendons anchored in TENSION
after concrete sets, tendons are cut from anchorages, putting the slabs in compression
can also be done ON SITE with POST-TENSIONING
