Load dependent loading Flashcards
1
Q
Important properties of hardened concrete.
A
Strength, Deformation under load, Durability, Permeability, Shrinkage
2
Q
What is compressive strength?
A
The max load that can be carried per unit area of concrete.
3
Q
Tensile strength?
A
Flexural strength of concrete.
4
Q
What specimen shapes are used in testing?
A
Cube, cylinder, square prism
5
Q
Types of deformation
A
Load dependent (Elastic, Creep) Load independent (shrinkage, Thermal expansion/contraction)
6
Q
Is concrete elastic and why?
A
It is not truly elastic due pore structure, microcracks and irreversible response to loading.
7
Q
Factors influencing E? (E=stress/strain)
A
- Concrete strength
- aggregate amount, nature, shape, size
- Rate of loading
- Moisture of specimen
8
Q
Types of creep recovery.
A
instantaneous, creep
9
Q
Factors affecting creep?
A
- applied stress
- w/c ratio
- temperature
- change in relative humidity
- Aggregate content
- Aggregate type
- geometry