ROOFING PRODUCT INCLUDING ROOFING-GRADE ASPHALT MIXTURE AND METHODS OF MAKING THE ROOFING PRODUCT AND THE ROOFING-GRADE ASPHALT MIXTURE

摘要

A method of forming a roofing-grade asphalt mixture can include mixing a bio-asphaltincluding a partially oxidized bio-source material, a bitumen source materialdifferentfrom the bio-asphalt, and particles to form the roofing-grade asphalt mixture.In anembodiment, the bitumen source material can have a softening point of at leastapproximately 102 °C and a penetration distance no greater thanapproximately 20 dmm. Inanother embodiment, the roofing-grade asphalt mixture can have a softeningpoint of at leastapproximately 104 °C, a penetration distance no greater thanapproximately 12 dmm, aviscosity of at least approximately 3000 cps at a temperature of 177°C, or any combinationthereof. The roofing-grade asphalt mixture can be applied to a base materialto form aroofing product.