| 摘要 |
<p>The addition of from about 0.1 to about 1 parts by weight of a natural polyphenolic-containing vegetable extract (1), extracted from plants including quebracho, chestnut, wattle and sumac, per 100 parts of bitumen (6) modifies the characteristics of the treated product (3) to enhance its performance as hot-melt adhesives, coatings, sealants, roof-coatings, and road-coatings as compared to the base bitumen. The anti-stripping agent may be mixed directly with the tars or put into a water solution and then added to hot tars with the water being driven off. Alternately, the anti-stripping agent may be applied to the aggregate to be mixed with the asphalt so as to produce a pretreated, anti-stripper coated aggregate.</p> |
