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Full-Text Articles in Engineering
Evaluation Of Stability And Rutting Potential Of Asphaltic Concrete Using Big-Stone Gradations, David L. Allen, Hossien Roghani
Evaluation Of Stability And Rutting Potential Of Asphaltic Concrete Using Big-Stone Gradations, David L. Allen, Hossien Roghani
Kentucky Transportation Center Research Report
Considerable interest has been generated in recent years in using big stone gradations to reduce rutting and shoving in asphaltic concrete. This report documents mix design procedures and a laboratory testing program to determine the stability and rutting potential of a big-stone gradation. A series of creep tests was performed on a big-stone gradation and the results were compared to creep tests performed on a Class I base mixture. The big-stone mix average approximately 50 percent rutting potential as compared to the Class I base. One creep specimen of the big-stone mixture was compacted using polymer-modified AC-20 grade asphalt cement. …
Shear Strength Of Compacted Shales, Tommy C. Hopkins
Shear Strength Of Compacted Shales, Tommy C. Hopkins
Kentucky Transportation Center Research Report
Some basic physical and engineering properties of a broad range of different types of shales located in Kentucky are examined. Physical testing included liquid limit, plastic limit, specific gravity, particle-size analysis, natural water content, and jar-slake determinations. These tests were performed on some forty different types of shales selected from various geological formations of different periods. Geological periods included Recent, Cretaceous, Tertiary, Pennsylvanian Mississippian, Silurian, Ordovician, and Devonian. Engineering tests included slake-durability, bearing ratio, consolidated-undrained triaxial compression tests with pore-pressue measurements, moisture-density relationships, well deflection and pressure, mineralogy, and Shore sclorescope. Ten different slake-durability testing procedures, including the original procedure …