What is the coefficient of thermal expansion of concrete?
The new (2002 Guide) pavement design procedures under development through NCHRP 1-37A consider the effects of thermal expansion and contraction….Typical α ranges for common PCC components.
| Coefficient of Thermal Expansion | ||
|---|---|---|
| w/c = 0.6 | 18-20 | 10-11 |
| Concrete | 7.4-13 | 4.1-7.3 |
| Steel | 11-12 | 6.1-6.7 |
What is thermal coefficient of concrete and steel?
The coefficients of thermal expansion of concrete and carbon steel bars are 1.1 × 10−5 ◦C−1 and 1.2 × 10−5 ◦C−1, respectively [8]. These close values imply an excellent thermal compatibility between the two materials.
What is a good coefficient of thermal expansion?
Common values for metals and alloys are in the range of 10 to 30×10–6/K (5.5 to 16.5×10–6/°F).
What is thermal expansion of concrete and steel?
The coefficient of thermal expansion of concrete and steel are alpha_concrete = 1.2 × 10−5/°C and alpha_steel = 1.1 × 10−5/°C, respectively. The length of the steel conforms to the size of the surrounding concrete.
What is thermal movement in concrete?
The thermal movement of concrete is the product of the temperature change times the coefficient of thermal expansion. The latter is generally taken to be 10 × 10–6 per °C, but it depends on the mix composition and on its moisture condition at the time of temperature change, which normally is within –30 to 65 °C.
What is thermal expansion concrete?
By. Coefficient of thermal expansion is defined as the change in unit length per degree of temperature change. In a concrete element, it is therefore a measure of the free strain produced in concrete subject to a unit change in temperature and is usually expressed in microstrain per degree centigrade (με/°C).
What does coefficient of thermal expansion mean?
When materials are heated, their size and volume increase in small increments, in a phenomenon known as thermal expansion. The coefficient ratio of thermal expansion indicates how much a material expands per 1℃ (2.2℉) rise in temperature.