Best Value Granular Material for Road Foundations

Status:  Complete
Report Date:  01/04/2012


Researchers evaluated how mechanistic-empirical design procedures can be used to make effective use of local Minnesota aggregates in the unbound pavement layers of flexible pavements by determining how aggregate properties such as angularity and surface texture affect aggregate quality as measured by resilient modulus and shear strength. Results showed that aggregate angularity and surface texture were more important to determining the resilient modulus of aggregates than gradation alone, and that use of locally available materials can be cost-effective for low-volume roads with 20-year design traffic level and no more than 1.5 million equivalent single-axle loads.

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