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A New Marketable Generation of the Integrated Non-Destructive Portable DIAS Measurement System

by George Exadaktylos, TUC. A New Marketable Generation of the Integrated Non-Destructive Portable DIAS Measurement System. http://minelab.mred.tuc.gr/dias/.

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A New Marketable Generation of the Integrated Non-Destructive Portable DIAS Measurement System

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  1. by George Exadaktylos, TUC A New Marketable Generation of the Integrated Non-Destructive Portable DIAS Measurement System http://minelab.mred.tuc.gr/dias/

  2. Modular advanced portable prototypes that may work in integrated form were developed in the frame of DIAS FP5 Project aiming at operational use in the building environment & cultural heritage spheres for the in situ or in lab mechanical characterization of geomaterials and artificial materials.

  3. Comparison of benefit/cost of Standard Testing & DIAS From DIAS final Report (December 2005) • Dynamic Elastic Modulus, 2. Static Elastic Modulus Additional work prescribed upon the Finalization of DIAS FP5 Project (DIAS Final Report, December 2005)

  4. DIAS original website and its logo

  5. More publicity of DIAS presented in its original website

  6. More publicity of DIAS presented in its original website

  7. Test site: Nidaros cathedral (Trondheim, Norway)

  8. The campaign of the last series of in situ measurements consisted of DIAS testing with its three modules at the selected monumental site of Aptera (i.e. Fig. 1.4a) in which destructive sampling has been previously carried out (e.g. see Fig. 1.14) for subsequent testing at the laboratory. Before testing with DIAS and in a preliminary visit at the site we also conducted ultrasonic measurements with commercial TiCO instrument. Hence, this site was chosen in order to compare also the negligible amage of the monumental stone caused by DIAS with the considerable damage produced by drill coring. The results of this comparison are listed in Table 1.2 below. The following immediate remarks may be made from this demonstration of DIAS, namely: • With DIAS and specifically with its microdrilling module we were able to measure the uniaxial compressive strength (UCS) and internal friction angle of the stone in situ; on the contrary no such evaluation was possible with the previously conducted destructive standard tests since the cored specimens didn’t fulfil the requirements of the standard procedure. • The uniaxial tensile strength of the stone is in reasonable agreement with the corresponding strength found from standard tests in lab. • The acoustical instrument of DIAS was able to estimate the dynamic Young’s modulus of the stone that clearly exhibits anisotropy. The corresponding value found from the commercial ultrasonic instrument is not reasonable and seriously underestimated; in addition the latter instrument was not able to determine the anisotropy of the stone which is very important for the restoration of the monument. • Moreover with the acoustical component of DIAS we were able to measure the dynamic Young’s modulus in two mutual perpendicular directions in consolidated part of the stone. These measurements revealed that the the consolidation increased significantly the strength of the stone in the vertical direction, whereas it didn’t affected the horizontal direction. This is a very important conclusion for the assessment of the quality control of the future consolidation measures for this monument. 5. Finally, it may be seen that the static Young’s modulus determined in situ with the indenter of DIAS is in very close agreement with the respective value determined with a standard UCS test.

  9. Objectives & expected impact of DIAS The above actions are aiming to the operational use and subsequent commercialization of DIAS. The impact will be the industrial production of DIAS instruments for the Construction industry, Tunnelling Industry, Building industry, Decorative Stone Industry and the Cultural Heritage Sector. Potential End-Users • Building & Construction Industries: SIKA, Spain • Decorative Stone Industry: IMM, Italy • Cultural Heritage sector: ICVBC, Italy • Tunnelling Industry:under investigation

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