Characterisation of Mortars Using Drilling Resistance Measurement System (DRMS): Tests on Field Panels Samples

  • Dória Costa
  • Ana Magalhães
  • Maria do Rosário Veiga
Conference paper
Part of the RILEM Bookseries book series (RILEM, volume 7)


Non-destructive or micro-destructive in situ tests are very relevant to the physical characterisation of materials used in historical buildings. “Controlled penetration,” “sphere shock” and “sonic methods” can be used to evaluate the mechanical resistance of mortars and renders or to monitor the hardening process after their application. Used to evaluate surface hardness, micro-drilling (DRMS) is a very sensitive technique, and its use in this field is expected to contribute to more precise results. However, the diversity of the composition of mortars and the systematic presence of abrasive components are limiting factors for the use of this method in this field. In this study, several mortars with different composition and hardness are compared using drilling resistance as the comparative parameter. The mortars were applied on-site aiming at their use in real situations. Extracted mortar samples were tested in the laboratory using resistance drilling which was complemented by additional methods currently used for in situ characterisation of these materials. The results highlight the need for an integrated perspective of laboratory and on-site information.


Compressive Strength Pulse Wave Velocity Silica Fume Ultrasonic Velocity Ultrasonic Pulse Velocity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. 1.
    Elsen, J.: Microscopy of historic mortars – a review. Cem. Concr. Res. 36, 1416–1424 (2006)CrossRefGoogle Scholar
  2. 2.
    RILEM TC 203-RHM – repair mortars for historic masonry. Testing of hardened mortars, a process of questioning and interpreting. Mater. Struct. vol. 42, No. 7, 2009, pp. 853–865Google Scholar
  3. 3.
    Magalhães, A., Veiga, M.R.: Physical and mechanical characterisation of ancient mortars. Application to the evaluation of the state of conservation. Mater. Constr. 59(295), 61–77 (2009). doi:10.3989/mc. 41907CrossRefGoogle Scholar
  4. 4.
    Veiga, M.R., et al.: Methodologies for characterisation and repair of mortars of ancient buildings. In: International Seminar Historical Constructions 2001. Universidade do Minho, Guimarães, November 2001Google Scholar
  5. 5.
    Magalhães, A.C., Veiga, M.R., Carvalho, F.: Diagnosis of anomalies of wall renderings. Experimental techniques for in situ application. In: Proceedings of XXX IAHS World Congress on Housing, Coimbra, Portugal, 9–13 Sept 2002Google Scholar
  6. 6.
    Magalhães, A., Veiga, M.R.: Comparison of in-situ mechanical tests on masonry mortars: sphere impact and controlled penetration test. In: International Conference on Heritage, Weathering and Conservation (HWC), Madrid, June 2006Google Scholar
  7. 7.
    Veiga, M.R., Velosa, A.L., Magalhães, A.C.: Experimental applications of mortars with pozzolanic additions. Characterization and performance evaluation. Construct. Build Mater. 23(1), 318–327 (2009)CrossRefGoogle Scholar
  8. 8.
    US Department Interior.: Nondestructive method for hardness evaluation of mortars (Project report). Preservation Technology and Training. Publication No 1999–02 (1999)Google Scholar
  9. 9.
    Tiano, P., Filareto, C., Ponticelli, S., Ferrari, M., Valentini, E.: Drilling force measurement system a new standardisable methodology to determine the stone cohesion: prototype design and validation. Int. J. Restor. Build. Monum. 6(2), 133–150 (2000)Google Scholar
  10. 10.
    EUROPEAN COMMITTEE OF STANDARDIZATION (CEN) – Methods of test for mortar for masonry – Bulk sampling of mortars and preparation of test mortars. CEN EN 1015–2 (1999)Google Scholar
  11. 11.
    Mimoso, J.M., Costa, D.: A new DRMS drilling technique for the laboratory. In: ART’05 – 8th International Conference on Non Destructive Investigations and Microanalysis for the Diagnostics and Conservation of the Cultural and Environmental Heritage, vol. 2, pp. 651–656 (2005)Google Scholar
  12. 12.
    Delgado Rodrigues, J., Costa, D.: A new method for data correction in drill resistance tests for the effect of drill bit wear. Int. J. Restor. 10(3), 219–236 (2004)Google Scholar

Copyright information

© RILEM 2012

Authors and Affiliations

  • Dória Costa
    • 1
  • Ana Magalhães
    • 2
  • Maria do Rosário Veiga
    • 2
  1. 1.National Laboratory for Civil Engineering (LNEC)LisbonPortugal
  2. 2.LNECLisbonPortugal

Personalised recommendations