Because base-course aggregate gradations frequently have aggregate top sizes greater than 1 in. , the use of the standard Marshall procedure in characterizing black-base mixtures has been questioned. A laboratory investigation was performed to evaluate the effect of increasing specimen size on the Marshall test results of emulsified-asphalt mixtures with an aggregate top size of 1. 5 in. Two specimens sizes, 4- and 6-in diameters, were fabricated and tested with Marshall equipment at 72 degree F. The effects of other factors such as aggregate type, aggregate gradation, and emulsion content were investigated. The modified Marshall stability and flow values increased because of increasing specimen size. Large specimens displayed a slow rate of curing that resulted in larger values of bulk specific gravity, retained moisture, and total liquid and a smaller percentage of air voids than the standard-size specimens.
|Original language||English (US)|
|Number of pages||3|
|Journal||Transportation Research Record|
|State||Published - Jan 1 1983|
ASJC Scopus subject areas
- Civil and Structural Engineering
- Mechanical Engineering