TWO APPARATUS FOR MEASURING THE FINENESS OF POWDERS

DEUX APPAREILS POUR MESURER LA FINESSE DES POUDRES

The grinding fineness of cement influences all properties of pastes and fresh or hardened concrete; it can be checked by analyzing the grading or the overall specific surface value. The CERILH has developed two apparatus based on the equation of permeability derived by Lea and Nurse: the first is a laboratory device which measures a very wide range (20 to 20000 cm 2/g) and can be used for all kinds of powdery materials; the second is an industrial device which requires a sample of approximately 150 g and gives a direct reading of the specific surface between 700 and 900 cm 2/g, for materials, the bulk density of which is between 2.5 and 4. /TRRL/

• Corporate Authors:

  Septima

  Rue Lafayette 19
  Paris,   France 
• Authors:
  • Bombled, J P
• Publication Date: 1974-7-8

Language

• French

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 237-241
• Serial:
  • Ciments, Betons, Platres, Chaux
  • Issue Number: 689
  • Publisher: Septima

Subject/Index Terms

• TRT Terms: Cement; Cement paste; Concrete hardening; Equations; Fineness; Fines (Materials); Grading (Earthwork); Measurement; Measuring instruments; Permeability; Powders; Specific surface
• Uncontrolled Terms: Grading; Hardened concrete
• Subject Areas: Highways; Materials; Planning and Forecasting; I32: Concrete; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00157476
• Record Type: Publication
• Source Agency: Central Laboratory of Bridges & Highways, France
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: Dec 8 1977 12:00AM