Asphalt (paving): Difference between revisions
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Asphalt ist a mix of [[bitumen]], [[aggregate]] and additives. Usual asphalt consists to 90 to 95 [[percent by weight]] of aggregate and 5 to 10 % of [[bitumen]]. | Asphalt ist a mix of [[bitumen]], [[aggregate]] and additives. Usual asphalt consists to 90 to 95 [[percent by weight]] of aggregate and 5 to 10 % of [[bitumen]]. | ||
Revision as of 04:23, 23 November 2007
Asphalt ist a mix of bitumen, aggregate and additives. Usual asphalt consists to 90 to 95 percent by weight of aggregate and 5 to 10 % of bitumen.
The physical properties are dependent on the temperature of the material, as at high temperatures, asphalt has a very distinctive viscous behaviour, which becomes more and more elastic with dropping temperatures.
As the physical properties are mainly dependent on the used aggregates, they can vary in a large range. Typical values are:
- heat conductivity: 0.8 - 1.2 W/mK
- specific heat capacity: 850 - 1050 J/kgK