| 摘要 |
<p>Polyurethane composites comprising a coarse aggregate and certain polyurethane binders. The composites are particularly useful for filling voids in roads, runways, and other structures made of asphalt, concrete, or similar building materials. The composites can be added to such open spaces after premixing or by allowing the binder to percolate through an aggregate already in place. Certain embodiments of the invention are effective in aqueous conditions.</p> |
