Open AccessIndirect Tensile Test as a Simple Method for Rut Resistance Evaluation of Asphalt Concrete
Author(s) -
Piotr Zieliński
Publication year - 2019
Publication title -
archives of civil engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.208
H-Index - 15
eISSN - 2300-3103
pISSN - 1230-2945
DOI - 10.2478/ace-2019-0032
Subject(s) - rut , asphalt , geotechnical engineering , asphalt pavement , asphalt concrete , ultimate tensile strength , materials science , air temperature , regression analysis , environmental science , structural engineering , mathematics , composite material , engineering , statistics , geology , atmospheric sciences
The paper presents the dependence of ITS results at the elevated temperature (40°C) on rutting parameters, i.e. proportional rut depth (PRD AIR ) and wheel tracking speed (WTS AIR ), obtained at the temperature of 60°C. The asphalt mixture samples were prepared in the gyratory compactor, but ITS tests were conducted with typical Marshall press, at a loading rate of 50 mm/min. Correlation analyses show a strong relationships between ITS results and rutting parameters, whereby the correlation coefficients obtained are higher for the PRD AIR parameter (r = −0.88) than WTS AIR (r = −0.81). Using the obtained regression functions, the prediction limits as well as confidence limits were calculated, which allowed to develop criteria for assessing resistance to rutting on the basis of ITS test, and taking into account the technical requirements in Poland.