Patent ID: 6221428
Filing Date: 2001-04-24
Classification: C08L,E01C,Y10T

Abstract:
A method for improving the structural stability and durability of an overlay comprising:(a) applying an effective amount of overlay composition to a base, the overlay composition comprising, in combination:(A) a base component containing an asphalt-type material selected from the group consisting of asphalt, asphalt/rubber, rubber, acrylic copolymer, and asphate/acrylic copolymer;(B) up to about 10 weight percent, by weight of said base component, of a water-soluble material;(C) about 0.25-10 weight percent, by weight of said base component, of reinforcing fiber, about 25%-100% by weight of which is a bicomponent fiber comprising:(i) a first component containing polyolefin; and(ii) a second component which can be wet by said first component, said second component having a higher softening point and a higher melting point than said first component;effective to favor softening or melting and migration of the first component about the second component;(D) up to about 3000 weight percent aggregate material by weight of said base component;(E) up to about 5 weight percent of a curing and thickening agent by weight of said base component; and(b) heating and working said overlay composition to favor softening or melting arid migration of the first component about the second component of said bicomponent reinforcing fiber within said overlay composition to form clumps or beads thereon.