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It was the purpose of this investigation to study the effect of crushed-gravel fine aggregate on the strength of some typical bituminous surfacing mixtures. These included a dense-graded bituminous concrete of controlled gradation, a sand-asphalt mixture in which the grading was kept constant and made equal to the sand fraction of the dense-graded bituminous concrete, and bituminous concrete mixtures in which the grading varied but was kept within ASTM specifications. The strength evaluation was based upon data obtained from three laboratory strength tests, namely: the Marshall stability test, a triaxial compression test, and the standard ASTM Compressive Strength Test for Bituminous Mixtures (ASTM Designation: D1074-52T). :

Effect of Crushed-Gravel Fine Aggregate on the Strength of Asphaltic Surfacing Mixture