Mechanisms of asphalt blistering on concrete bridges
2012 (English)In: Journal of ASTM International, ISSN 1546-962X, Vol. 9, no 3Article in journal (Refereed) Published
Blistering is a major problem in asphalt-covered concrete structures, such as multi-storage parking buildings, built-up roofs, tunnels, pedestrian areas, or concrete bridge decks. In this particular research, a linear viscoelastic finite-element model is developed to simulate time-dependent blister growth in an asphalt layer under uniformly applied pressure with and without temperature and pressure fluctuation. Indirect tensile tests on mastic asphalt (MA) are performed at three different temperatures to characterize and determine the material properties for the model. A three-dimensional thick-plate axisymmetric finiteelement model is developed using ABAQUS with linear viscoelastic properties and validated with closedform solution from first-order shear-deformation theory for thick plates. Elastic-viscoelastic analogy is used to find an analytic solution for the time-dependent deflection of the blister. In addition, the blister test is conducted on different samples of MA in the laboratory and digital image correlation measurement technique is used to capture the three-dimensional vertical deflection of the MA with time. Finally, the results from image correlation are compared with the finite-element simulation and thick-plate theory analytic solution. The finite-element model simulation shows that the daily temperature variations may have a significant influence on blister growth in asphalt pavements. It is found that the blister can grow continuously under repeated loading conditions over subsequent days. The study concludes that temperature fluctuation in the blister has more influence on blister growth than fluctuation of the pressure inside the blister.
Place, publisher, year, edition, pages
2012. Vol. 9, no 3
ABAQUSTM, Blister growth, Closed-form solution, Creep, Finite-element method, Indirect tensile test, Master curve, Prony series, Relaxation, Sigmoidal function, Closed form solutions, Finite element methods (FEM), Sigmoidal functions, Asphalt, Asphalt pavements, Concrete bridges, Concrete construction, Image analysis, Loading, Temperature distribution, Three dimensional, Finite element method
IdentifiersURN: urn:nbn:se:kth:diva-99591DOI: 10.1520/JAI104135ScopusID: 2-s2.0-84860147699OAI: oai:DiVA.org:kth-99591DiVA: diva2:542438
QC 201208012012-08-012012-08-012013-06-25Bibliographically approved