Crack growth behaviour in geosynthetic asphalt interlayer systems

Geosynthetic interlayers in asphalt systems have become a convenient technology for lifetime prolongation in road construction engineering. Durability and lifetime prediction analysis of such systems can be obtained by fatigue crack growth testing. In this paper, the fatigue crack growth properties...

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Bibliographic Details
Published in:Road materials and pavement design 2012-01, Vol.13 (1), p.156-170
Main Authors: Tschegg, E. K., Jamek, M., Lugmayr, R.
Format: Article
Language:English
Subjects:
Alloys
Applied sciences
Asphalt pavements
Bitumen. Tars. Bituminous binders and bituminous concretes
Bond strength
Building failures (cracks, physical changes, etc.)
Buildings. Public works
Crack initiation
Crack propagation
Durability. Pathology. Repairing. Maintenance
Engineers
Exact sciences and technology
fatigue crack growth
geosynthetic interlayer
Laboratories
Maintenance costs
Materials
Materials fatigue
Propagation
Road construction. Pavements. Maintenance
road lifetime
Roads & highways
Temperature
Tensile strength
Transportation infrastructure
wedge splitting test
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Summary:Geosynthetic interlayers in asphalt systems have become a convenient technology for lifetime prolongation in road construction engineering. Durability and lifetime prediction analysis of such systems can be obtained by fatigue crack growth testing. In this paper, the fatigue crack growth properties of three different asphalt interlayer system groups with different interlayer functions: SAMI (=Stress Absorbing Membrane Interlayer), asphalt reinforcement and the combination of SAMI+asphalt reinforcement are reported. For comparison non-interlayer systems (reference) have also been tested. Instead of 3- or 4-point bending tests with beams, wedge splitting tests with drill cores from the field are used for analyzing the fatigue crack growth behaviour of these systems. Due to the temperature dependence of asphalt the tests have been performed in a climate chamber at−10°C, 0°C and+10°C. Crack growth propagation was determined visually. The results show that this new visual approach for evaluation of crack growth testing together with the wedge splitting test are practicable, reproducible and allow grading of geosynthetic asphalt interlayer systems.
ISSN:1468-0629
2164-7402
DOI:10.1080/14680629.2011.644414