The Assessment of Durability of Fibre Concretes with Dense Aggregate and Concrete Recyclate from the Results of Permeability and Diffusion Tests

Abstract:

The mechanical and deformation characteristics of mass concrete are considerably improved by adding long structural fibres. This addition, however, does not always extend the durability of concrete. One of the key factors in the evaluation of durability of fibre concretes is the assessment of permeability of their surface layer using one of the non-destructive methods. In this research, three of these methods were used: two permeation methods with a gaseous medium, TORRENT and CO₂ permeability method, and the British ISAT with a liquid medium, on the grounds of their simplicity of application and their possible combinability. The test results show that both TORRENT and ISAT methods can be used to assess the durability of both concrete and fibre concrete with dense aggregate. In the case of concrete containing concrete recyclate, however, the TORRENT method was not effective. Also the method of determining the permeability for CO₂ was not suitable for the concrete with concrete recyclate. Even for other concretes this method was too complicated and too dependent on the marginal conditions of the measurement.

• Periodical: Advanced Materials Research (Volume 1100)
• Pages: 106-111
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1100.106
• Online since: April 2015
• Authors: Tomáš Stavař*, Michal Stehlík
• Keywords: CO₂ Diffusion, Concrete Recyclate, Durability, Fibre Concrete, Permeability, Polymer Fibres

References

[1] ADÁMEK, J., JURÁNKOVÁ, V.: Durability of the concrete as a function of properties of concrete layer, Transactions on Transport Sciences, Vol. 2(4), pp.188-195, 2010a.

DOI: 10.5507/tots.2009.027

[2] CEP-FIP Model Code, Final Draft, Section 5. 1. 13.: Properties related to durability, pp.106-110, Ernst und Sohn, Germany, (2010).

[3] ADÁMEK, J., JURÁNKOVÁ, V., KUCHARCZYKOVÁ, B.: Fibre concrete and its air permeability, in Proceeding of 5th International Conference Fibre Concrete, CTU Praque, Czech Republic, pp.9-14, (2009).

[4] KIM, B., BOYD, A. J., LEE, J. Y.: Durability performance of fiber-reinforced concrete in severe environments, Journal of Composite Materials 4(23), pp.239-2389, (2011).

DOI: 10.1177/0021998311401089

[5] ADÁMEK, J., JURÁNKOVÁ, V., KADLECOVÁ, Z., STEHLÍK, M.: Three NDT methods for the assesment of concrete permeability as a measure of durability. In Nondestructive testing of materials and structures. Rilem Bookseries. Istanbul, Turkey, Springer in RILEM Bookseries. pp.32-38. (2012).

DOI: 10.1007/978-94-007-0723-8_42

[6] ADÁMEK, J., JURÁNKOVÁ, V.: Evaluation of durability of concrete by measurement of permeability for air and water, in the 10th International Conference Modern Building Materials, Structures and Techniques - Selected papers, Vol. 1, Lithuania, pp.1-5.

[7] EN 1062-6: Paints and varnishes. Coating materials and coating systems for exterior masonry and concrete. Determination of carbon dioxide permeability. August (2002).

DOI: 10.3403/02617562u

[8] KUCHARCZYKOVÁ, B., MISÁK, P., VYMAZAL, T. : Determination and evaluation of the air permeability coefficient using Torrent permeability tester, Russian Journal of Nondestructive Testing, Vol. 46(3), p.226 – 233, (2010).

DOI: 10.1134/s1061830910030113

[9] STEHLÍK, M., STAVAŘ, T.: Carbonation depth vs. physical properties of concretes with alternative additions of concrete recyclate and silicate admixtures, Advanced Materials Research, Vol. 89(1), pp.290-296, (2014).

DOI: 10.4028/www.scientific.net/amr.897.290

[10] STEHLÍK, M.: Enhancing the durability of concrete made of concrete recyclate by additives and admixtures, Journal of Civil Engineering and Management, Vol. 20(iFirst), pp.1-10, (2014).

DOI: 10.3846/13923730.2013.802708

[11] STEHLÍK, M.: Accelerated carbonation depth test in an atmosphere of 98% CO2, Engineering Structures and Technologies, Vol. 3(2), pp.51-55, (2011).