Concrete and Reinforcing Steel
18 important questions on Concrete and Reinforcing Steel
What are the main components of hardened concrete?
How is compression strength of concrete found?
Why is NSC heterogeneous?
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Why is the HSC stress strain response curve linear and brittle?
What is the typical compression strength of beams and slabs?
Why does concrete density influence the elastic modulus?
The modulus of elasticity intersects the non-linear stress strain curve at which level?
At what compression stress is the linear approximation given by modulus of elasticity an unsafe estimate?
How is tension strength measured?
Why is bending tension higher than direct tension strength
For 30 MPa concrete what are the bending and direct tension strengths?
- Direct tension = 0.33*sqrt(30)
What physical phenomena cause creep and shrinkage?
How large can creep strain become as a portion of elastic strain?
What three factors influence creep AND shrinkage
- Humidity level/temperature
- Strength of paste
- Aggregate to cement ratio
What factor only influences creep and not shrinkage?
Why do reinforcing bars have deformations
What is the linear portion of the stress strain curve of steel?
What is strain hardening?
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