USE OF CONTAMINATED GRAVEL IN PAVEMENT ROADBASES - THE MEUSE GROUINE

UTILISATION DE GRAVES POLLUEES EN ASSISES DE CHAUSSEES - LA GROUINE DE MEUSE

GROUINE IS A TYPE OF SILTY GRAVEL ORIGINATING FROM LIMESTONE WEATHERED THROUGH PERIGLACIAL PHENOMENA. LABORATORY STUDIES HAVE SHOWN THAT STABILIZATION WITH 6% CEMENT (CPALC) LED TO USEFUL CHARACTERISTICS AND THAT PRELIMINARY TREATMENT WITH LIME WAS NOT NECESSARY. DURING STRENGTHENING AND IMPROVEMENT OPERATIONS ON THE RN64 IN 1973, CEMENT-STABILIZED GROUINE WAS USED AS SUBBASE AND, EXPERIMENTALLY AS A 20 CM-THICK STRENGTHENING LAYER; SO FAR, RESULTS ARE SATISFACTORY. THE NON-DESTRUCTIVE TESTING OF THIS SECTION WITH A LIGHTWEIGHT VIBRATOR HAS SHOWN THAT RAYLEIGH SPEEDS NEAR THOSE NORMALLY OBTAINED ON GRAVEL CEMENT, COULD BE REACHED. THE STUDY OF STABILIZATION WITH GRANULATED OR PRECRUSHED SLAG GAVE ENCOURAGING RESULTS; HOWEVER THIS TYPE OF WORK MUST NOT BE CARRIED OUT IN LATE AUTUMN SO THAT THE STABILIZED MATERIAL MAY HAVE SUFFICIENT STRENGTH TO WITHSTAND THE EFFECTS OF FROST. ATTENTION IS DRAWN TO THE FACT THAT IN 1962 A LOCAL MATERIAL SIMILAR TO THE MEUSE GROUINE WAS STABILIZED WITH CEMENT AND USED FOR THE PAVEMENT OF THE MONTPELLIER-CARNON MOTORWAY AND THAT UP TO THE PRESENT TIME THE BEHAVIOUR OF THIS PAVEMENT IS SATISFACTORY.

Language

  • French

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Filing Info

  • Accession Number: 01297226
  • Record Type: Publication
  • Source Agency: Institut Francais des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)
  • Files: ITRD
  • Created Date: Nov 21 2010 6:16AM