THE SPECIFIC GRAVITY OF AGGREGATES AND ITS USE TO COMPUTE VOIDS IN ASPHALTIC MIXTURES

EL PESO ESPECIFICO DE LOS ARIDOS Y SU EMPLEO EN EL CALCULO DE MEZCLAS ASFALTICAS. PUESTA A PUNTO DE UN NEUEVO PROCEDIMENTO DE ENSAYO

Important errors which are frequently made in the determination of the voids content in asphaltic mixtures can influence the computation of the optimum binder content. The errors derive from different factors, for instance, type of specific gravity adopted, separation of the aggregates into several fractions, and kind of liquid used for the determination of the specific gravity. A detailed study of the common procedures for the calculation of specific gravity, and of the usual standards, show the inconvenience of using water as the immersion medium; a liquid more similar in character to bitumen at mixing temperature is more satisfactory. Details are given of a method for the determination of specific gravity of aggregate mixtures (including filler) using a picnometer and paraffin oil as immersion medium. The repeatability of the method is greater than 0,0003 unit of specific gravity. For the covering abstract of the conference, see IRRD Abstract No. 207931. /TRRL/

  • Authors:
    • Munoz
  • Publication Date: 1971

Language

  • Spanish

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00082767
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Conf Paper
  • Files: ITRD, TRIS
  • Created Date: Jul 15 1975 12:00AM