RIGID PAVEMENTS. MAINTENANCE. CONTRIBUTION OF RADIO-ACTIVE TRACERS TO THE FOLLOW-UP STUDY OF CEMENT GROUTS USED IN THE STABILIZATION OF CONCRETE PAVEMENT SLABS OR RUNWAYS

CHAUSSEES EN BETON - ENTRETIEN - CONTRIBUTION DES TRACEURS RADIOACTIFS AU SUIVI D'INJECTIONS DE COULIS DE CIMENT POUR STABILISER DALLES DE CHAUSSEES OU PISTES EN BETON

EXISTING CONCRETE PAVEMENTS CARRYING HEAVY TRAFFIC SUFFER SERIOUS DAMAGE LINKED WITH DETERIORATION IN THE SUBBASE. IN ORDER TO REMEDY THESE DISORDERS INJECTION IS USED TO IMPROVE THE SLAB/SUBBASE INTERFACE. UP TO NOW THE EFFECTIVENESS OF INJECTION OPERATIONS WAS ESTABLISHED ONLY BY MEANS OF EXTERNAL OBSERVATIONS SUCH AS RECORDING OF DETERIORATION AND MEASUREMENT OF SLAB PLAY BEFORE AND AFTER INJECTION. THE USE OF RADIOACTIVE TRACERS FACILITATES A MUCH FINER STUDY OF THE PROBLEM. FOLLOWING LABORATORY STUDIES IT WAS FOUND THAT IT WAS POSSIBLE TO USE TIN-INDIUM GENERATORS FOR DETECTING THE INJECTED GROUT THROUGH CONCRETE THICKNESSES OF 30 CM. IN SITU TESTS MAKE IT POSSIBLE TO LOCATE THE DISORDERS AND, UNDER CERTAIN CONDITIONS, TO EVALUATE THE THICKNESS OF GROUT INJECTED UNDER THE SLAB. EXAMPLES OF THE TECHNIQUE ARE GIVEN. THIS METHOD ENABLES THE CONTRACTOR TO DETECT LOSSES OF GROUT IN THE SHOULDERS, EXCESSIVE SPREADING OF THE GROUT UNDER THE SLAB OR INADEQUATE FILLING OF CAVITIES.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/04585860
• Authors:
  • BELIN, J P
  • CHRISTORY, J P
• Publication Date: 1978-7

Language

• French

Media Info

• Pagination: 110-8
• Serial:
  • BULL LIAISON LAB PONTS CHAUSS
  • Issue Number: 96
  • ISSN: 0458-5860

Subject/Index Terms

• TRT Terms: Cement; Construction sites; Grout; Laboratories; Physical distribution; Rigid pavements; Slabs; Thickness; Tracers (Chemistry)
• Uncontrolled Terms: Injection (Materials)
• ITRD Terms: 4758: Cement; 3628: Construction site; 9016: Distribution (gen); 4729: Grout; 3617: Injection (mater); 6237: Laboratory (not an organization); 2964: Rigid pavement; 3491: Slab; 5933: Thickness; 6718: Tracer (nucl)
• Subject Areas: Freight Transportation; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 01288330
• 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 1:16AM