SAND EQUIVALENT AND MEASUREMENT OF THE HARMFULNESS OF CRUSHED SAND

EQUIVALENT DE SABLE ET MESURE DE LA NOCIVITE DES SABLES CONCASSES

The sand equivalent test is used to show the possible harmfulness of the fines contained in sandy aggregates. The influence of the following parameters which influence the sand equivalent value determined in the test was studied: mass of the selected material and sample volume, moisture content and saturation time, granularity of sandy and fine elements, method of shaking the sample and sedimentation time. The results obtained proved that it is impossible to characterize the harmfulness of sand with a high fines content from sand equivalent test data. For such materials test procedure modifications were introduced: the percentage of elements smaller than 80 microns was reduced to 10% and bringing down the test material to 2 mm. Those modifications make it possible to place conditions of flocculation in the zone where the sand equivalent value is an approximately linear function of harmfulness. (TRRL)

• Corporate Authors:

  Laboratoire Central des Ponts et Chausees (LCPC)

  Boulevard Lefebvre 58
  Paris Cedex 15,   France  F-75732
• Authors:
  • Campanac, R
• Publication Date: 1980-5-6

Language

• French

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 122-129
• Serial:
  • Bulletin de Liaison des Lab des Ponts et Chaussees
  • Issue Number: 107
  • Publisher: Laboratoire Central des Ponts et Chausees (LCPC)

Subject/Index Terms

• TRT Terms: Crushed aggregates; Crushed rock; Fillers (Materials); Fine aggregates; Measurement; Modular structures; Percent saturation; Pollution; Sand; Sand equivalent test; Test procedures; Tests
• Uncontrolled Terms: Modifications
• ITRD Terms: 4173: Crushed stone; 4599: Filler; 6136: Measurement; 9048: Modification; 2453: Pollution; 4105: Sand; 6240: Sand equivalent; 6255: Test; 6288: Test method
• Subject Areas: Environment; Geotechnology; Highways; I36: Aggregates;

Filing Info

• Accession Number: 00331427
• Record Type: Publication
• Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
• Files: ITRD, TRIS
• Created Date: Aug 15 1981 12:00AM