Sensitivity analysis of dynamic response and fatigue behaviour of various asphalt concrete mixtures

Abstract

A B S T R A C T This paper presents the dynamic response (|E*|) and fatigue behaviour of various asphalt concrete mixtures subjected to sinusoidal compressive loading. Eight different wearing and base mixtures including Superpave, Asphalt Institute, British Standard dense bituminous macadam and Pakistan's National Highway Authority gradations were selected, and gyratory compacted specimens were fabricated. Laboratory investigations of |E*| at various temperatures (4.4 to 54.4°C) and loading frequencies (0.1 to 25 Hz) were used to construct stress-dependent master curves separately, for wearing and base course mixtures. The indicators of dynamic response and viscous (or elastic) properties of the mixtures were used to derive fatigue parameter to estimate the resistance to fatigue, and results revealed that Superpave wearing and NHA-B base course had better resistance to fatigue for evaluated mixtures. Also, the sensitivity of the dynamic modulus to the variation in hot mix asphalt mix properties using different aggregate gradation, diverse loading frequencies and temperature were evaluated.

Investigation of fatigue and fracture properties of asphalt mixtures modified with carbon nanotubes

“…Based on the concepts of viscoelastic continuum damage mechanics, they evaluated the fatigue resistance of different asphalt mixtures as a function of loading rate and asphalt modification. Ali et al studied the fatigue behaviour of different asphalt mixtures under sinusoidal compressive load for utilizing dynamic modulus test. The four‐point flexural beam fatigue test can well simulate the fatigue response of asphalt mixtures because of its similarity to the tensile forces in the pavement structures induced by bending stresses of the moving vehicles.…”

“…Based on the concepts of viscoelastic continuum damage mechanics, they evaluated the fatigue resistance of different asphalt mixtures as a function of loading rate and asphalt modification. Ali et al48 studied the fatigue behaviour of different asphalt mixtures under sinusoidal compressive load for utilizing dynamic modulus test.…”

Rutting and Fatigue Properties of Cellulose Fiber-Added Stone Mastic Asphalt Concrete Mixtures

“…Numerous studies indicated the use of the various additives in SMA apart from cellulose fiber [4-6, 9, 11, 13-15]. Different research demonstrated the evaluation of |E * | and development of master curves [14,[16][17][18][19][20][21][22][23][24][25][26][27][28].…”

Quantification of different effects occurring during fatigue tests on bituminous mixtures

“…Between 2 consecutive fatigue lags, a 24 hour rest period was imposed (axial stress was maintained at 0 MPa). During each rest period, 16 measurements of E* were performed after, respectively, 10, 20, and 30 minutes and 1,2,4,6,8,10,12,14,16,18,20,22, and 24 hours. The duration of these measurements, for which only 100 cycles were applied at 10°C and 10 Hz, is insignificant about the global rest period duration.…”