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Mechanisms of asphalt blistering on concrete bridges
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Highway and Railway Engineering.
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Highway and Railway Engineering.
2012 (English)In: Journal of ASTM International, ISSN 1546-962X, E-ISSN 1546-962X, Vol. 9, no 3Article in journal (Refereed) Published
Abstract [en]

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
Keyword [en]
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
National Category
Infrastructure Engineering
Identifiers
URN: urn:nbn:se:kth:diva-99591DOI: 10.1520/JAI104135Scopus ID: 2-s2.0-84860147699OAI: oai:DiVA.org:kth-99591DiVA: diva2:542438
Note
QC 20120801Available from: 2012-08-01 Created: 2012-08-01 Last updated: 2017-12-07Bibliographically approved
In thesis
1. Mechanisms of Blister Formation on Concrete Bridge Decks with Waterprooving Asphalt Pavement Systems
Open this publication in new window or tab >>Mechanisms of Blister Formation on Concrete Bridge Decks with Waterprooving Asphalt Pavement Systems
2013 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Bridge decks are commonly subjected to harsh environmental conditions that often lead to serious corrosion problems triggered by blisters under the hot mix asphalt bridge deck surfacing and secretly evolving during weather exposure until damage is often detected too late. Blisters may form under both the waterproofing dense mastic asphalt layer or under the waterproofing membrane which is often applied as additional water protection under the mastic asphalt (MA). One of the main technical issues is the formation of blisters under the membrane and asphalt-covered concrete structures caused by a complex mechanism governed by bottom-up pressure and loss of adhesion.

A linear viscoelastic finite-element model was developed to simulate time-dependent blister growth in a dense mastic asphalt layer under uniformly applied pressure with and without temperature and pressure fluctuation. A finite element model was developed using ABAQUS with linear viscoelastic properties and validated with a closed form solution from first-order shear-deformation theory for thick plates. In addition, the blister test was conducted on different samples of MA in the laboratory and digital image correlation measurement technique was used to capture the three-dimensional vertical deflection of the MA over time. It was found that the blister may grow continuously under repeated loading conditions over subsequent days.

With respect to blistering under waterproofing membranes, mechanical elastic modeling and experimental investigations were performed for three different types of membranes under in-plane stress state. The orthotropic mechanical behavior of a polymer modified bitumen membrane (PBM) was determined from biaxial test data. Finally, blister tests by applying controlled pressure between orthotropic PBMs and concrete plates were performed for studying the elliptical adhesive blister propagation using digital 3D image correlation. The energy calculated from elliptical blister propagation was found comparable to the adhesive fracture energy from standard peeling tests for similar types of PBMs. This indicates that the peeling test assists to evaluate and rank the adhesive properties of different types of membranes with respect to blister formation at room temperature without conducting time consuming and complicated pressurized blister propagation tests using digital 3D image correlation.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2013. x, 97 p.
Keyword
blister growth, PBM waterproofing membrane, orthotropic material, biaxial test, peeling test, elliptical blister growth
National Category
Civil Engineering
Identifiers
urn:nbn:se:kth:diva-124078 (URN)
Presentation
2013-06-13, B25, Brinellvägen 23, KTH, Stockholm, 09:30 (English)
Opponent
Supervisors
Note

QC 20130625

Available from: 2013-06-25 Created: 2013-06-25 Last updated: 2013-06-25Bibliographically approved

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