"Portland cement concrete." . . "Asphalt content." . . "National cooperative highway research program report" . "Evaluation of construction control procedures; aggregate gradation variations and effects" . . . . . . . . . . . . . "4 individual studies concerned with the gradation of aggregates used in highway construction were conducted on: (1) effect of variations in gradation of coarse aggregate on characteristics of Portland cement concrete. (2) variation in gradation of aggregates in bituminous hot-mix plants, (3) effect of increment size on sampling accuracy, and (4) mathematical study of the pattern of variations in gradation of aggregates." . "Evaluation of construction control procedures : aggregate gradation; variations and effects" . . . . . . . . "Publications officielles" . . "Evaluation of construction control procedures : aggregate gradation variations and effects" . . "Evaluation of construction control procedures : aggregate gradation variations and effects"@en . . . . "Materials Research and Development." . . "Aggregate gradation." . . "National Research Council (É.-U.). Highway Research Board." . .