Identification and quantification of the extent of asphalt stripping in flexible pavements in Oregon : phase II.
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1985-06-01
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Abstract:This report is the second phase of a study in Oregon to evaluate the effect of material sources, void content, and additive type on retained strength (AASHTO T-165) or retained modulus (NCHRP Report 192). A total of 20 projects were evaluated in the laboratory as a part of Phase I. The results clearly indicated that material and additive type affect asphalt aggregate interaction.
The results of Phase II are presented herein. A total of 8 of the Phase I projects were sampled and tested for: 1) mix properties, and 2) asphalt and aggregate properties. The results of Phase II indicate: 1) there is evidence the IR and modulus ratios correlate with field performance; 2) there is substantial variation in IRS and modulus ratios between the mix design and field cores; and 3) the long-term effects of additives need to be determined.
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