Effectiveness of the steel mesh track in repairing asphalt pavements in Małopolska region
Autor
Zieliński, Piotr
Opublikowane w
IOP Conference Series: Materials Science and Engineering
Numeracja
Vol. 356 (012017)
Data wydania
2018
Wydawca
IOP Publishing
Język
angielski
ISSN
1757-8981
eISSN
1757-899X
DOI
10.1088/1757-889X/356/1/012017
Uwagi
Resilient and Safe Road Infrastructure 8–9 May 2018, Kielce, Poland
Słowa kluczowe
steel mesh track, FWD deflections basin, Bearing capacity of pavement, fatigue life of pavement, asphalt pavement strengthening
Abstrakt
The aim of this publication is to present and evaluate the effectiveness of the steel mesh track during reconstruction of the pavement on national roads in Małopolska. The paper presents the condition of the pavement before reconstruction, applied design solutions and the current state after 6-10 years of operation. To assess the effectiveness of pavement reinforcement, the results of central deflection tests using the FWD apparatus before and a few years after the reconstruction were compared, it was found that the reinforcement effect was achieved, what has been demonstrated by means of significance analysis of differences in Statgraphics program. Additionally the analyses were extended with parameters characterizing the FWD deflection basin. For selected parameters the values of tensile strains at the bottom of asphalt layers were determined on the basis of correlations given in literature and then the fatigue life was calculated using the criteria of the USA Asphalt Institute and compared with the results of design calculations. The pavement fatigue life estimated on the basis of FWD measurements is generally greater than the one calculated for the design solutions. The assessment of the influence of the steel mesh track on the bearing capacity of the pavement was carried out indirectly, by comparing the central deflections of the structures measured after the reconstruction, with theoretical deflections calculated using the pavement model in the BISAR program, without taking into account the presence of the steel mesh. In some cases the deflections measured are significantly smaller than the deflections calculated for the model without mesh, which can be explained by the reinforced effect of the steel mesh track, especially for sections with the lowest bearing capacity before reconstruction, and where the steel mesh track is placed in the tension zone of the asphalt layers.
