Filtering by
- All Subjects: Roads
- All Subjects: Hayden, Carl Trumball, 1877-1972
- Creators: Potter, A. F.
- Creators: Arizona. Department of Transportation. Research Center
The objective of this study was to evaluate the effect of typical chemical winter maintenance practices on Arizona Department of Transportation pavements. A review of previous studies on the effect of deicing/anti‐icing chemicals did not yield definitive recommendations, especially for DIAICs typically used by ADOT. Researchers conducted a laboratory study evaluating the effects of magnesium chloride, potassium chloride, sodium chloride, and distilled water on eight different open‐graded rubber‐modified asphalt concrete mixes using the boiling test. All experimental factors were found to be statistically significant, and the researchers provide recommendations on which DIAICs should be used for different binder and aggregate types.
Letter from A. F. Potter to Carl T. Hayden describing John H. Page's request to build a railway for the Canyon Copper Company as "impractical."
Letter from A. F. Potter to Carl Hayden regarding W. W. Bass's livery permit. Bass's fee to maintain the roads has been reduced to $50 per year, but he will still need to keep his business at least a hundred feet from the Grand Canyon rim so as not to disturb visitors.