PSI - Issue 73

Robert Jurczak et al. / Procedia Structural Integrity 73 (2025) 45–50 Robert Jurczak/ Structural Integrity Procedia 00 (2025) 000–000

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 In the case of joints between old and new mastic asphalt with the use of self-adhesive bitumen tape, failure consistently occurred at the interface between the old and new layers. This failure was of an adhesive nature, indicating a lack of monolithic behavior in such joints. In summary, it can be concluded that insufficient care in the execution of joints between protective layers made of mastic asphalt may lead to a reduction in the overall structural integrity of the pavement on engineering objects. The methods currently employed on construction sites for forming such joints often fail to ensure adequate strength in the interface zone between the existing and newly applied mastic asphalt. According to the author, the most effective solution is to apply the protective mastic asphalt layer across the full width of the carriageway, continuously from expansion joint to expansion joint, without interruptions. However, in cases where uninterrupted application is not feasible, a more favorable approach appears to be the use of infrared heaters to preheat the edge of the previously laid layer, without the application of self-adhesive tape. Nonetheless, this method requires further investigation to validate its effectiveness. References Radziszewski, P., Piłat, J., Sarnowski, M., Król, J., Kowalski, K. J. (2016). Nawierzchnie asfaltowe na obiektach mostowych [Asphalt pavements on bridge structures]. Oficyna Wydawnicza Politechniki Warszawskiej. Jurczak, R. (2014). Asfalt naturalny w nawierzchniach mostowych [Natural asphalt in bridge pavements]. Mosty, 4, 30–32. Kołodziej, K., Bichajło, L., Siwowski, T. (2021). Influence of composition and properties of mastic with natural asphalt on mastic asphalt mixture resistance to permanent deformation. Roads and Bridges – Drogi i Mosty, 20(1), 57–73. https://doi.org/10.7409/rabdim.021.004 Sybilski, D. (2008). Stosowanie asfaltu lanego [Application of mastic asphalt]. Magazyn Autostrady, 5, 52–59. Hering, M., Ruttmar, I. (2014). Nowoczesne nawierzchnie z asfaltu lanego na obiektach mostowych w Toruniu [Modern mastic asphalt pavements on bridge structures in Toruń]. Mosty, 4, 34–38. Jurczak, R. (2024). Bridge deck drainage system failure as a cause of pavement distress – a case study. In Proceedings of the 31st International Conference on Structural Failures, Międzyzdroje, Poland. European Committee for Standardization. (2020). EN 12697-1: Bituminous mixtures – Test methods – Part 1: Soluble binder content. European Committee for Standardization. (2020). EN 12697-20: Bituminous mixtures – Test methods – Part 20: Indentation using cube or Marshall specimens. Generalna Dyrekcja Dróg Krajowych i Autostrad. (2014). Wymagania techniczne. Nawierzchnie asfaltowe na drogach krajowych. WT-2 2014 – część I: Mieszanki [Technical requirements. Asphalt pavements on national roads. WT-2 2014 – Part I: Asphalt mixtures]. European Committee for Standardization. (2016). EN 196-1: Methods of testing cement – Part 1: Determination of strength. Stefańczyk, B., Mieczkowski, P. (2008). Mieszanki mineralno-asfaltowe. Wykonawstwo i badania [Bituminous mixtures: Construction and testing]. Wydawnictwa Komunikacji i Łączności.