Methods and systems for modifying asphalts

Mineral oils: processes and products – Products and compositions – Asphalts – tars – pitches and resins

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C208S044000

Reexamination Certificate

active

07374659

ABSTRACT:
A method for modifying asphalt comprises blowing an oxygen-containing gas through a base asphalt at a high gas flow rate while simultaneously agitating the base asphalt at a high shear rate and at an elevated temperature for a period of time that is effective to substantially improve at least two paving properties of the base asphalt. In preferred embodiments, modified asphalts are produced having both substantially improved rutting resistance and substantially improved fatigue resistance as compared to the base asphalt.

REFERENCES:
patent: 1782186 (1930-11-01), Abson
patent: 2179208 (1939-11-01), Burk et al.
patent: 2200914 (1940-05-01), Burk et al.
patent: 2370007 (1945-02-01), Carr
patent: 2375117 (1945-05-01), Lentz
patent: 2450756 (1948-10-01), Hoiberg
patent: 3126329 (1964-03-01), Fort
patent: 3462359 (1969-08-01), Hammond
patent: 3652445 (1972-03-01), Senolt et al.
patent: 3833528 (1974-09-01), Behling et al.
patent: 3923633 (1975-12-01), Senolt et al.
patent: 3935093 (1976-01-01), Senolt et al.
patent: 3952137 (1976-04-01), Turler
patent: 4338137 (1982-07-01), Goodrich
patent: 4436864 (1984-03-01), Grossi et al.
patent: 4440579 (1984-04-01), Eidem
patent: 4456523 (1984-06-01), Carlos et al.
patent: 4456524 (1984-06-01), Wombles et al.
patent: 4618373 (1986-10-01), Eidem
patent: 4750984 (1988-06-01), Ott
patent: 4882373 (1989-11-01), Moran
patent: 4975176 (1990-12-01), Begliardi et al.
patent: 5284509 (1994-02-01), Kamel et al.
patent: 5302638 (1994-04-01), Ho et al.
patent: 5336705 (1994-08-01), Gorbaty et al.
patent: 5342866 (1994-08-01), Trumbore et al.
patent: 5364894 (1994-11-01), Portfolio et al.
patent: 5397818 (1995-03-01), Flanigan
patent: 5421876 (1995-06-01), Janoski
patent: 5549744 (1996-08-01), Puzic et al.
patent: 5863971 (1999-01-01), Baanders et al.
patent: 5981632 (1999-11-01), Fields
patent: 6060542 (2000-05-01), Gooswilligen et al.
patent: 6087419 (2000-07-01), Fields
patent: 7060743 (2006-06-01), Deygout et al.
patent: 7202290 (2007-04-01), Stuart et al.
patent: 0 078 701 (1986-01-01), None
patent: 0 459 811 (1994-10-01), None
patent: 0 618 274 (1994-10-01), None
patent: WO 9317076 (1993-09-01), None
ASTM D8-97. Standard Terminology Relating to Materials for Roads and Pavements.Annual Book of ASTM Standards, vol. 04.03, American Society for Testing and Materials, West Conshohocken, PA, 1999.
Billiter, T.C., RR Davison,C. J. Glover, and J.A. Bullin. Production of Asphalt-Rubber Binders by High-Cure Conditions. InTransportation Research Record1586, TRB National Research Council, Washington D.C., 1997, pp. 50-56.
Billiter, T.C., J.S. Chun, R.R Davison, C.J. Glover, and J.A. Bullin. Investigation of the Curing Variables of Asphalt-Rubber Binder.Petroleum Science and Technology, vol. 15, No. 5&6, 1997, pp. 445-469.
Chipps, J.F., T.C. Billiter, RR Davison, and C.J. Glover. Oxidative Aging of Asphalt Rubber and Implications to Performance Analysis.ACS Preprint, vol. 43, No. 4, Boston, MA, Aug. 22-27, 1998, pp. 1057-1062.
Davison, RR, N.Y. Vassiliev, S.A. Williamson, and C.J. Glover. Producing Superior Asphalts Through Air Blowing. To be presented at the 218th ACS National Meeting in New Orleans, LA, Aug. 22-26, 1999.
Glover et al., A Comprehensive Laboratory and Field Study Of High-Cure Crumb-Rubber Modified Asphalt Materials, Report 1460-1, Jan. 2000.
Kamel, et al., “Critlcal Laboratory Evaluation of Asphalt Binders Modified by Refining Processes,” 49thAnnual CTAA Conference, Montreal, Nov. 22, 2004.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Methods and systems for modifying asphalts does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods and systems for modifying asphalts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and systems for modifying asphalts will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2804827

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.