Raw Asphalt temp vs viscosity
Raw Asphalt temp vs viscosity
(OP)
I was wondering if anyone has any information on the relationship between temperature and viscosity for raw asphalt. The asphalt I am specifically looking for is Citgo 180 Pen asphalt. I could run the tests and make my own graph. I was just hoping someone else might have already done the same information.
Thanks
Thanks





RE: Raw Asphalt temp vs viscosity
log10.log10(ν+0.7)= A-B.log10(T+273)
where ν = kinematic viscosity in cSt and T is temperature in °C.
In the process environment this seems to work i.e within acceptable error.
You need the viscosity at two different temperatures to solve for A & B for every sample.
You can try the spreadsheet at www.ViscoAnalyser.com (follow the link on the homepage) which solves this equation at various temperatures.
This equation is the key to some effective process viscosity measurements for asphalt blending.
JMW
www.viscoanalyser.com
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RE: Raw Asphalt temp vs viscosity
RE: Raw Asphalt temp vs viscosity
I think you got your answer for your viscosity question in the other thread you posted.
rmw
RE: Raw Asphalt temp vs viscosity
Here, this link is to the Engineering toolbox. You will also find lots of calculators there.
http://www.engineeringtoolbox.com/21_412.html
More difficult to find are relationships between PEN and kinematic viscosity. There are various papers on this around but mostly proprietary. Maybe someone else can point out an internet source.
However, PEN is not the only way to grade ashphalts, sample tresting often uses cone plate laboratory viscometers which heat the sample to a reference temperature. Experience suggests that modern process measurements can be more accurate with these difficult materials (unless you resort to exceptional sample handling and use statistical methods).
JMW
www.viscoanalyser.com
Eng-Tips: Pro bono publico, by engineers, for engineers.
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Raw Asphalt temp vs viscosity
Otherwise one can use ASTM D 341 charts (middle or high range) for the purpose of plotting kin. viscosities vs temperatures.