Load dependent loading Flashcards

1
Q

Important properties of hardened concrete.

A

Strength, Deformation under load, Durability, Permeability, Shrinkage

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2
Q

What is compressive strength?

A

The max load that can be carried per unit area of concrete.

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3
Q

Tensile strength?

A

Flexural strength of concrete.

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4
Q

What specimen shapes are used in testing?

A

Cube, cylinder, square prism

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5
Q

Types of deformation

A
Load dependent (Elastic, Creep)
Load independent (shrinkage, Thermal expansion/contraction)
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6
Q

Is concrete elastic and why?

A

It is not truly elastic due pore structure, microcracks and irreversible response to loading.

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7
Q

Factors influencing E? (E=stress/strain)

A
  1. Concrete strength
  2. aggregate amount, nature, shape, size
  3. Rate of loading
  4. Moisture of specimen
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8
Q

Types of creep recovery.

A

instantaneous, creep

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9
Q

Factors affecting creep?

A
  1. applied stress
  2. w/c ratio
  3. temperature
  4. change in relative humidity
  5. Aggregate content
  6. Aggregate type
  7. geometry
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