Roads and Bridges - Drogi i Mosty
19, 1, 2020, 27-49

Application of the new viscoelastic method of thermal stress calculation to the analysis of low-temperature cracking of ashpalt layers

Józef Judycki Mail
Gdańsk University of Technology, Faculty of Civil and Environmental Engineering, 11/12 Narutowicza Str., 80-233 Gdańsk
Published: 2020-03-31

Abstract

High Modulus Asphalt Concrete base course of a motorway under construction cracked severely during the first winter after paving. The new viscoelastic method of thermal stress calculation was used to gain a better understanding of the mechanism of thermal stresses and development of low-temperature cracking in asphalt layers. This paper presents pavement structure and materials, thermal cracks intensity assessment, field and laboratory testing and the outline of the new viscoelastic method. Thermal stresses in the HMAC base course were calculated at its surface and at the depth of 5 cm at the time when transverse cracking occurred. The calculated thermal stresses were compared with tensile strength of the material. Probability of low-temperature cracking was determined. The results presented in the paper confirmed that the new method of thermal stress calculation was a valuable tool for analysis of low-temperature cracking. Several uncertainties and unsolved issues related to low-temperature cracking, which were discovered during the analysis, were described.

Keywords


High Modulus Asphalt Concrete, low-temperature cracking of asphalt layers, probability of cracking of asphalt, theory of viscoelasticity, viscoelastic stress analysis in asphalt layers.

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References


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Application of the new viscoelastic method of thermal stress calculation to the analysis of low-temperature cracking of ashpalt layers

  
Judycki, Józef. Application of the new viscoelastic method of thermal stress calculation to the analysis of low-temperature cracking of ashpalt layers. Roads and Bridges - Drogi i Mosty, [S.l.], v. 19, n. 1, p. 27-49, mar. 2020. ISSN 2449-769X. Available at: <>. Date accessed: 20 Oct. 2020. doi:http://dx.doi.org/10.7409/rabdim.020.002.