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- W621821456 abstract "Reflective cracking of asphalt pavements depends among others on crack growth properties of the material. These properties are often described by Paris law. This empirical law has been demonstrated initially to be an acceptable description for crack growth in metals. The Stress Intensity Factor (SIF) K used is derived for linear elastic material behaviour. In this paper results are demonstrated to support the use of the SIF concept for the non-linear non-elastic asphalt material. The Paris law has been extended to incorporate effects of frequency and proportion of constant and cyclic fractions of the load. Tests have been carried out on Centre Cracked Tensile (CCT) and Four Point Bending (FPB) specimens. Three materials were tested: two artificial asphalt concretes 0/2 with different and relatively high percentages of bitumen and an asphalt concrete 0/8. The 0/2 asphalt was used to scale down the material in order to get insight in the behaviour of large cracks and the effect of the inherent inhomogeneous material while using specimens with typical dimensions of several decimeters. The 0/8 asphalt was used to match the result to practical mixes and to get insight in the effect of homogeneity. Several frequencies f and ratio of minimum - maximum values R of the cyclic load control were investigated. The result is the reduction of the measurements to a single mastercurve of the type of the Paris law with different shift factors for different materials and constant shift factors for f and R. For the covering abstract see ITRD E109276." @default.
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- W621821456 date "2000-01-01" @default.
- W621821456 modified "2023-09-27" @default.
- W621821456 title "THE STRESS INTENSITY FACTOR CONCEPT FOR CRACK GROWTH IN ASPHALT" @default.
- W621821456 hasPublicationYear "2000" @default.
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