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Using Scanning Electron Microscope and Computed Tomography for Concrete Diagnostics of Airfield Pavements

Authors: M. Linek

Abstract:

This article presents the comparison of selected evaluation methods regarding microstructure modification of hardened cement concrete intended for airfield pavements. Basic test results were presented for two pavement quality concrete lots. Analysis included standard concrete used for airfield pavements and modern material solutions based on concrete composite modification. In case of basic grain size distribution of concrete cement CEM I 42,5HSR NA, fine aggregate and coarse aggregate fractions in the form of granite chippings, water and admixtures were considered. In case of grain size distribution of modified concrete, the use of modern modifier as substitute of fine aggregate was suggested. Modification influence on internal concrete structure parameters using scanning electron microscope was defined. Obtained images were compared to the results obtained using computed tomography. Opportunity to use this type of equipment for internal concrete structure diagnostics and an attempt of its parameters evaluation was presented. Obtained test results enabled to reach a conclusion that both methods can be applied for pavement quality concrete diagnostics, with particular purpose of airfield pavements.

Keywords: Scanning electron microscope, computed tomography, cement concrete, airfield pavements.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1126882

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[1] Glinicki M. A., Durability of concrete in road surfaces. Effect of microstructure, materials design, diagnostics (in Polish), IBDiM, Warsaw, 2011, z. 66, p.1-286;
[2] Group work: Diagnosis of Concretes and High Performance Concrete by Structural Analysis (in Polish), Institute of Fundamental Technological Research Polish Academy of Sciences, Warsaw, 2003, p. 1-218;
[3] Bazant Z. P.: Analysis of pore pressure, thermal stresses and fracture in rapidly heated concrete, Int. Workshop on fire performance of high strength concrete, February 1997, NIST Maryland, p. 13-14;
[4] Linek M.: Airport concrete pavements with improved parameters of physical and mechanical properties on the loads caused by forced temperature (in Polish), doctoral thesis, Kielce, 2013, p. 1-216;
[5] Halverson A-C: Characterization of geomaterials with X-ray computed tomography (X-ray CT) Iowa State University, Ames, Iowa, 2008, p. 1-212;
[6] Linek M., Nita P.: The impact of the ceramic modifier on selected characteristics of the physical and mechanical properties of concrete pavement airport (in Polish), VII Conference Dni Betonu, Wisła, 2012, p. 83-92:
[7] Saleh H.H., Livingston R.: The Use of X-Ray Computed Tomography (CT) Techniques to Study the Internal Structures of Concrete, e-Journal of Nondestructive Testing, June 2004, Vol. 9, No. 06;
[8] Plessis A., Boshoff W. P.: Simple and fast porosity analysis of concrete using X-ray computed tomography, Materials and Structures, December, 2014, p. 1-12;
[9] Ratajczyk E.: X-ray computed tomography (CT) for industrial tasks (in Polish), Pomiary automatyka Robotyka, 2012, vol. 5, p.104-113;
[10] PN-EN 12390-1:2013 Testing hardened concrete - Part 1: Shape, dimensions and other requirements for specimens and moulds;
[11] PN-EN 12390-2:2011 Testing hardened concrete - Part 2: Making and curing speciments for strength tests;