Evaluation of the Engineering Characteristics of Rap/aggregate Blends : Project Summary Report 2005
Evaluation of the Engineering Characteristics of Rap/aggregate Blends : Project Summary Report 2005
Montana.Dept. of Transportation.Research Programs
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(1997) Crushed Stone, Hanks and Magni (1989) 9 *- j i ■ 1 □ 10 20 30 40 50 60 70 80 90 100 Percent RAP (%) FIGURE 3. Permeability versus percent RAP Figure 3. This is considered a desirable trait for material used to support asphaltic pavement surfaces. What the researchers recommend The outlook for the continued implementation of RAP as an additive to granular base and subbase materials for use in highway construction looks promising. Laboratory testing conducted during this study indicates ...that blending asphalt millings with granular cohesionless material like crushed aggregate or pit run gravel results in only minor changes to the engineering properties of the virgin material. Small changes to strength and compressibility were observed; however, the changes did not appear to increase or decrease in a regular manner. Measured R-values for two different virgin aggregates were acceptable even when as much as 75% millings were used to create the RAP blends.
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