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Evaluation of masonry consolidation by geo-electrical relative difference resistivity mapping

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Abstract

A methodology was developed to clean geo-electrical measurements on masonry structures from geometrical and other disturbing factors such as moisture and salts.

Only relevant information about the internal structural situation of the masonry remains.

This paper shows the practical applicability of cement grout consolidation as well as its control by means of resistivity measurements. A plain brickwork test wallet is used in the experiment. Controlled cracking is made in the initially sound wallet and repair is done by cement grout injection. Resistivity values are measured in the sound, cracked and repaired situation. Relative difference mapping of these resistivity measurements shows a clear picture of the internal situation in the masonry and can serve as a basis for design decisions.

Résumé

Une méthodologie a été développée pour supprimer les perturbations provenant de l'humidité et des sels dans la maçonnerie sur les mesures géo-électriques de la résistivité de ces constructions en maçonneries. Ainsi, seule l'information concernant la structure interne de la maçconnerie reste. L'applicabilité d'une injection de coulis à base de ciment et le contrôle de cette injection en mesurant la résistivité de la maçonnerie sont démontrés. Un muret de maçonnerie plein est utilisé dans les essais de performance de l'injection et du contrôle géo-électrique. Une fissure contrôlée est opérée dans le muret sain. Ensuite, la réparation est faite par injection d'un coulis à base de ciment. Les valuers des résistivités sont mesurées pour le muret sain, fissuré puis injecté. Des cartes de différences relatives de résistivité démontrent clairement la condition interne de la maçonnerie et peut servir de base à des décisions de projets.

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Authors and Affiliations

  1. Department of Civil Engineering, Catholic University of Leuven, Kasteelpark Arenberg 40, B-3001, Heverlee, Belgium

    L. Schueremans, F. Van Rickstal, K. Venderickx & D. Van Gemert

Authors
  1. L. Schueremans
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  2. F. Van Rickstal
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  3. K. Venderickx
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  4. D. Van Gemert
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Additional information

Editorial Note Prof. Dr. Dyonis van Cemert is a RILEM Serior Member, He is the Serreary of both RILEM TCs EMC ‘Emimement-conscious construction ..... and systems’, and TDP ‘Application of titamium dioxide photanadpe to construction material’.

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Schueremans, L., Van Rickstal, F., Venderickx, K. et al. Evaluation of masonry consolidation by geo-electrical relative difference resistivity mapping. Mat. Struct. 36, 46–50 (2003). https://doi.org/10.1007/BF02481570

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  • DOI: https://doi.org/10.1007/BF02481570

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