Encapsulated asphalt

Stock material or miscellaneous articles – Sheet including cover or casing – Complete cover or casing

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Details

428403, 42840224, 428407, 428489, B32B 516

Patent

active

052543854

ABSTRACT:
This invention provides an encapsulated asphalt which is comprised of an asphalt cement or modified asphalt cement encapsulated by a polymeric coating (examples: ethylene vinyl acetate copolymer, ethylene-acrylic acid copolymer, polyethylene, polypropylene, etc.). The pellet of encapsulated asphalt is of such a size that it may be handled transported and stored at ambient temperatures and in much the same manner as grain, aggregate, or other granular materials. The encapsulated asphalt cement or modified asphalt cement will not suffer from degradation due to prolonged storage. The polymeric coating material and thickness may be chosen such that the coating will not alter the asphalt properties significantly, or may be used as a modifier for the asphalt which will be incorporated into the asphalt at the point of use.

REFERENCES:
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patent: 4460723 (1984-07-01), Rollmann
patent: 4873275 (1989-10-01), Moran et al.
patent: 5019610 (1991-05-01), Sitz et al.
ASTM Designation: D 3381-83.sup.E1, Standard Specification for Viscosity-Graded Asphalt Cement For Use in Pavement Construction.
AASHTO Designation: M 226-78, Standard Specification for Viscosity Graded Asphalt Cement.
Transportation Research Record No. 1342, Author-Joe W. Button, Title-"Summary of Asphalt Additive Performance at Selected Sites".
Canadian Technical Asphalt Association Proceedings-1986, Author-L. E. Moran Title-"Compatibility-The Key to Modified Asphalt Performance".
Asphalt Paving Technology 1991, Author-Tayebali et al., Title-"Relationships Between Modified Asphalt Binders Rheology and Binder Aggregate Mixtures Permanent-Deformation Response".
Asphalt Paving Technology 1991, Author-Rowlett, Title-"A Methodology for Evaluation of Performance-Based Tests Using Asphalt Modifiers".
Author-Joe Button, Title-"Methods to Determine Polymer Content of Modified Asphalt", Jan. 1991.
ASTM-June Meeting Agenda-1991.
Engineered Asphalt Products, Multigrade Modified Asphalt Cement Seminar Agenda.
Suit-Kote company literature.
Fina Oil and Chemical product literature, "Polymerized Asphalts--Putting the Stick'em Back in Asphalt".
Elf Aquitaine Asphalt product literature, "Styrelf-The Asphalt for Today's Hot Mix--Performance for the Long Road".
Shell Chemical Company product literature, "Inroads" vol. 5, No. 2, 1992.

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