TY - JOUR
T1 - An alternative analysis of indirect tensile test results for evaluating fatigue characteristics of asphalt mixes
AU - Barman, Manik
AU - Ghabchi, Rouzbeh
AU - Singh, Dharamveer
AU - Zaman, Musharraf
AU - Commuri, Sesh
PY - 2018/3/30
Y1 - 2018/3/30
N2 - Fatigue cracking is one of the major distresses responsible for the failure of asphalt pavements. The widely-accepted Superpave® volumetric mix design method does not consider screening the asphalt mixes based on their fatigue resistance. Based on a survey conducted in this study, it was found that many state Departments of Transportations (DOTs) do not perform a fatigue test during mix design, mainly due to lack of specialized equipment, trained personnel and consensus about the most appropriate test method. This present study was undertaken to suggest a simple, quick and effective fatigue test method and the corresponding data analysis procedure. It was found that the indirect tension test, which is usually conducted in the DOTs on a regular basis, can be used to characterize the fatigue resistance of asphalt mixes as well. A simplified data analysis approach has been proposed. The fatigue resistance of asphalt mixes can be determined by using a newly derived parameter called Fatigue Index (fi). Fatigue resistance of five different asphalt mixes were evaluated using this new parameter, fi. It was found that the fi parameter were able to statistically discriminate five selected asphalt mixes with respect to their fatigue resistance. The effectiveness of the fi parameter was verified by investigating its correlations with the results of the semi-circular bend and four-point beam fatigue test results.
AB - Fatigue cracking is one of the major distresses responsible for the failure of asphalt pavements. The widely-accepted Superpave® volumetric mix design method does not consider screening the asphalt mixes based on their fatigue resistance. Based on a survey conducted in this study, it was found that many state Departments of Transportations (DOTs) do not perform a fatigue test during mix design, mainly due to lack of specialized equipment, trained personnel and consensus about the most appropriate test method. This present study was undertaken to suggest a simple, quick and effective fatigue test method and the corresponding data analysis procedure. It was found that the indirect tension test, which is usually conducted in the DOTs on a regular basis, can be used to characterize the fatigue resistance of asphalt mixes as well. A simplified data analysis approach has been proposed. The fatigue resistance of asphalt mixes can be determined by using a newly derived parameter called Fatigue Index (fi). Fatigue resistance of five different asphalt mixes were evaluated using this new parameter, fi. It was found that the fi parameter were able to statistically discriminate five selected asphalt mixes with respect to their fatigue resistance. The effectiveness of the fi parameter was verified by investigating its correlations with the results of the semi-circular bend and four-point beam fatigue test results.
KW - Asphalt mix
KW - Fatigue
KW - Four-point beam fatigue (BF)
KW - Indirect tensile strength (ITS)
KW - Indirect tension (IDT)
KW - Semi-circular bend (SCB)
KW - Toughness index (TI)
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U2 - 10.1016/j.conbuildmat.2018.01.049
DO - 10.1016/j.conbuildmat.2018.01.049
M3 - Article
AN - SCOPUS:85043273719
VL - 166
SP - 204
EP - 213
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
ER -