| 摘要 |
<p>A method of preparing modified asphalt includes mixing polyethylene (12), such as linear high density polyethylene, with an asphalt composition and heating. The method optionally includes mixing a styrene butadiene rubber (13) with the polyethylene (12) and asphalt (26). The modified asphalt (30) is coated (38) on a substrate material, such as a fiberglass mat or other substrate, imparting strength, durability and waterproofing characteristics. The mixing process suspends the polyethylene and optional styrene butadiene rubber as a three dimensional, reinforcing matrix within the asphalt. One example of a source of polyethylene material (12) includes recycled polyethylene food containers. The recycled polyethylene material (12) is reduced to polyethylene chips (18) together with the optional styrene butadiene rubber (13) and maintained in suspension in the asphalt composition (30) with mixing and heating.</p> |
