C - Chemistry – Metallurgy – 10 – C
Patent
C - Chemistry, Metallurgy
10
C
C10C 3/00 (2006.01) C10C 3/10 (2006.01) G01N 17/00 (2006.01) G01N 33/42 (2006.01)
Patent
CA 2368664
An improved method for simulating an oxidative aging of an asphalt sample comprises accumulating a number of samples from the asphalt load order test. The samples are initially heated by convection and microwave units to a common temperature. Subsequently, the samples are incrementally, as heated in a "ramp" control heating, from 27°C to 147°C over a 60-minute period. Subsequently, the samples are microwave heated for three successive 60-minute periods and one 30-minute period under a pressure of 440 psi. Upon pressure release, a subsequent short convection heating and subsequent degassing, a resulting aged residue is presented which is equivalent to residue provided by known conventional tests but at a reduced time period.
Moffat & Co.
The Kansas Department Of Transportation
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