MEASUREMENT OF THE THICKNESS OF THE WATERPROOFING COURSE OF ENGINEERING STRUCTURES BY MEANS OF A NEUTRON PROBE
MESURE DE L'EPAISSEUR DES CHAPES D'ETANCHEITE D'OUVRAGES D'ART A L'AIDE D'UNE SONDE NEUTRONIQUE
This note describes the adaptation of a neutron probe, developed for measuring the thickness of water films on the pavement, to the measurement of the thickness of waterproofing courses, using the principle of the marked slowing down of the neutrons by the hydrogen of the pitch-epoxy waterproofing course. Details are given of the prototype apparatus, calibration and nature of the support, sensitivity and accuracy of the probe, influence of the mesh effect, variations in the thin layer of air and influence of surface conditions, extension of the use of the probe, application to surfacings on metal bridge decks. This measuring technique can be used for any spreading process and for whatever type of support of the hydrogen film (concrete, metal, even bituminous mixture). On a material which is not of a mesh-type, the measurement is non-destructive, the layer closes itself as soon as the probe is withdrawn. On an interwoven type of material, it is necessary to make holes in the layer. /TRRL/
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Corporate Authors:
Laboratoire Central des Ponts et Chausees (LCPC)
Boulevard Lefebvre 58
Paris Cedex 15, France F-75732 -
Authors:
- Bergue, J M
- Publication Date: 1976-5-6
Language
- French
Media Info
- Features: Figures; Photos; References; Tables;
- Pagination: p. 143-149
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Serial:
- Bulletin de Liaison des Lab des Ponts et Chaussees
- Issue Number: 83
- Publisher: Laboratoire Central des Ponts et Chausees (LCPC)
Subject/Index Terms
- TRT Terms: Backscattering; Bridge decks; Construction sites; Epoxy resins; Films (Coatings); Measurement; Neutrons; Pavements; Pitch (Dynamics); Polymerization; Probes (Measuring devices); Seal coats; Surfaces; Thickness; Water; Waterproofing
- Old TRIS Terms: Pitch; Probes; Water film
- ITRD Terms: 6160: Back scattering apparatus; 3482: Bridge deck; 3628: Construction site; 7468: Epoxy resin; 6136: Measurement; 4950: Pitch (mater); 7481: Polymerization; 6438: Surface; 5933: Thickness; 3492: Waterproofing course (bridge)
- Subject Areas: Bridges and other structures; Construction; Highways; Pavements; I53: Construction of Bridges and Retaining Walls;
Filing Info
- Accession Number: 00152546
- Record Type: Publication
- Source Agency: Central Laboratory of Bridges & Highways, France
- Report/Paper Numbers: Analytic
- Files: ITRD, TRIS
- Created Date: Jul 2 1977 12:00AM