Desert Varnish, Rocky Point Viaduct. Experimental Features No. 94-02B

摘要

In 1995, ODOT sprayed the reinforced shotcrete slope stabilization project near211u001ePort Orford on US 101 with Permeon, rock coloring material also called desert 211u001evarnish. The application colored the shotcrete to a weathered-looking dull brown, 211u001emasking its gray-white concrete appearance. Some weathering in the last three 211u001eyears has changed the color. Water and mud running from the above cliff have 211u001eadded white and brown streaks. Also, wind and salt air erosion have faded some of 211u001ethe coloring. The test area is still darker than the control section which 211u001ereceived no application. The value of the desert varnish appears to be marginal. 211u001eIf the three-year trend continues, the salt air and strong winds will discolor 211u001ethe entire treatment.