EFFECTS PRODUCED BY VARIOUS PROPERTIES OF AGGREGATES

KVALTETSKRITERIER FOER GRUS-OCH MAKADAMMATERIAL

A literature review was made of the effects of certain properties of aggregates on road construction in Sweden. The survey covered petrographic composition, specific gravity, grading, particle shape, strength, bond to binders, durability (resistance to weathering), resistance to polishing (in road pavements), moisture content, thermal properties, percentage of organic impurities, degree of freedom from coatings of clay or the like, chloride content, and capacity of protection against radiation. Petrographic analysis is a valuable complement to the investigations of materials which are carried out in the manufacture of concrete and in road construction. In particular this applies to materials of comparatively low quality. In the manufacture of concrete and in road construction, the specific gravity and the porosity of natural aggregate materials are of importance in connection with mix design of concrete and bituminous compounds respectively. Particle size distribution or grading can be determined by means of a routine test which forms part of the processing of aggregates. The particle shape is usually not determined in the practical processing of aggregates for concrete in Sweden. On the other hand, the rock materials for road construction have to comply with requirements for certain difinite values of flakiness index and the ratio of crushed particles. Swedish experience related to strength, bond, durability and other concepts are also discussed.

  • Corporate Authors:

    Cement and Concrete Research Institute

    Drottning Kristinas Vaeg 26
    Stockholm 70,   Sweden 
  • Authors:
    • HOEBEDA, P
    • JOHANSSON, L
  • Publication Date: 1975

Language

  • Swedish

Media Info

  • Features: Figures; References;
  • Pagination: 156 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00139835
  • Record Type: Publication
  • Report/Paper Numbers: CBI 5:75
  • Files: TRIS
  • Created Date: Oct 6 1976 12:00AM