METHOD OF PROPORTIONING PHOSPHOGYPSUM, FLY-ASH AND SLAG IN A MIXTURE BY MEASUREMENT OF THEIR NATURAL RADIOACTIVITY

METHODE DE DOSAGE DU PHOSPHOGYPSE, DES CENDRES VOLANTES ET DU LAITIER DANS UN MELANGE PAR MESURE DE LEUR RADIOACTIVITE NATURELLE

Three mixtures used in roadbases are considered: ash/phosphogypsum/lime, gravel/slag/phosphogypsum, sand/slag/phosphogypsum. A feasibility study of fine mixtures showed the mass effect and found a way of eliminating it. Tests on samples from experimental sections showed that proportioning of two radioactive components of the mixture (phosphogypsum ash or phosphogypsum slag) can be obtained in 15 minutes, the relative inaccuracy being less than 10%. The method proved to be operational, and a method applicable on site was developed, in which the photoscintillation detector is used. Measures made under these new conditions show satisfactory accuracy of proportioning (approximately 10%), the rate of measurement being approximately 3 proportioning operations per hour, allowing for handling. (TRRL)

• Corporate Authors:

  Laboratoire Central des Ponts et Chausees (LCPC)

  Boulevard Lefebvre 58
  Paris Cedex 15,   France  F-75732
• Authors:
  • Dufresne, D
• Publication Date: 1980-1-2

Language

• French

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 17-26
• Serial:
  • Bulletin de Liaison des Lab des Ponts et Chaussees
  • Issue Number: 105
  • Publisher: Laboratoire Central des Ponts et Chausees (LCPC)

Subject/Index Terms

• TRT Terms: Base course (Pavements); Chemical analysis; Fly ash; Gypsum; Measurement; Methodology; Nuclear radiation; Phosphoric acid; Phosphorus inorganic compounds; Proportioning; Radioactivity; Slag; Waste products (Materials)
• Old TRIS Terms: Phosphorus compounds
• ITRD Terms: 4563: By product; 7163: Chemical analysis; 4580: Fly ash; 9102: Method; 7330: Phosphoric acid; 6726: Radiation (nucl); 4561: Slag
• Subject Areas: Geotechnology; Highways; Materials; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 00325692
• Record Type: Publication
• Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
• Files: ITRD, TRIS
• Created Date: Sep 16 1981 12:00AM