Evaluation of Interlayer Shear Bond Devices for Asphalt Pavements

Raab, Christiane; Partl, Manfred N.; Halim, A O Abd El

doi:10.3846/1822-427x.2009.4.186-195

Cited by 57 publications

(31 citation statements)

References 8 publications

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“…Here, the effect of a given interlayer system may depend on the exact loading conditions (repeated thermal loading, traffic loading). Raab et al (2009), shear testing is recognized as a good and effective method for testing the interlayer bond of asphalt pavements. A first interlaboratory test was organized during the TC 206-ATB of the RILEM in order to compare the different shear test procedures to assess interlayer bonding properties in asphalt pavements (Piber et al 2009).…”

Section: Laboratory Testsmentioning

confidence: 99%

Review of glass fibre grid use for pavement reinforcement and APT experiments at IFSTTAR

Nguyen¹,

Blanc²,

Kerzreho³

et al. 2013

Road Materials and Pavement Design

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Reinforcement using an interlayer system has been demonstrated for more than four decades as a multi-purpose solution to improve performance, to extend service life and thus to reduce maintenance costs of road pavements. Among a large number of existing interlayer systems, glass fibre grids have shown effective use in pavement reinforcement with a hot mix asphalt overlay. Recently they have received increasing attention from the pavement community. However, as for other types of interlayer systems, the mechanisms underlying the effectiveness and proper installation of this type of reinforcement system are still not fully understood, and the choice of the most appropriate grid (e.g. mesh size, tensile strength) and its optimal location in the pavement system are mainly based on experience. This article presents firstly a literature review on the use of glass fibre grids in pavement reinforcement. Then some results of recent full-scale tests on the accelerated pavement testing facility of the IFSTTAR are presented. They confirm that glass fibre grid properly installed near the bottom of the asphalt layer improves significantly the fatigue life of the reinforced pavement. They also demonstrate the efficiency of glass grid use under only a thin asphalt overlay. Finally, first results obtained using an original instrumentation of glass grid strands by means of strain gages, to understand better the mechanical behaviour of the glass fibre reinforcement in a new pavement structure are described

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Section: Laboratory Testsmentioning

confidence: 99%

Review of glass fibre grid use for pavement reinforcement and APT experiments at IFSTTAR

Nguyen¹,

Blanc²,

Kerzreho³

et al. 2013

Road Materials and Pavement Design

View full text Add to dashboard Cite

show abstract

“…Currently, tests available for pavement layer interface evaluation mainly focus on interface shear resistance. In addition, most existing tests are performed in monotonic mode, which is not representative of the pavement interface loading conditions under traffic [7]. Also, tests used to evaluate cracking resistance of interlayer materials require large specimens, which are relatively difficult to fabricate in the laboratory and more difficult to obtain from the field [8][9][10][11][12].…”

Section: Overviewmentioning

confidence: 99%

Test Method to Evaluate the Effect of Interface Bond Conditions on Top-Down and Reflective Cracking

Chen¹,

Lopp²,

Roque³

2012

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A composite specimen interface-cracking (CSIC) test was developed to evaluate the effect of the characteristics of the interface between asphalt layers on resistance to topdown and reflective cracking. The system involves repeated tensile loading and monitoring of the rate of damage development (reduction in stiffness) on composite specimens specifically designed for this purpose. Top-down cracking tests were performed on opengraded friction course (OGFC) mixtures placed on dense-graded mixtures using both a conventional tack coat and a polymer-modified asphalt emulsion (PMAE) at a higher application rate. Reflective cracking tests were performed on dense-graded mixtures. Results clearly indicated that use of polymer-modified bonding material significantly reduced the rate of damage development for both top-down and reflective cracking. The testing and interpretation methods developed can be used to optimize bonding materials and application rates for enhanced cracking performance. The methods may also provide a suitable specification test for bonded systems.

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“…Different devices and testing procedures have been presented, divided in several types: Torque Test; Tensile Test (Pull-off Test); Pure Direct Shear Test and Direct Shear Test with Normal Stress Applied, but the lack of standards on these procedures allows the diffusion of ever new prototypes, typically used to better investigate the different factors affecting shear interface strength. The comparison between the proposed devices has shown that the shear test is a good and effective method for testing the interlayer bond of asphalt pavements (Raab et al, 2009). …”

Section: Introductionmentioning

confidence: 99%

“…Several factors concerning the surface, such as cleanness, dryness, roughness and age have been considered in the experimental plan to define the interaction between different surface characteristics of the underlying layer and the adhesion properties (Raab et al, 2009;Tashman et al, 2006). This result is also confirmed by Santagata et al (2008) that showed an increasing interlayer shear resistance for higher macro-texture.…”

Section: Introductionmentioning

confidence: 99%

Interface Roughness Parameters and Shear Strength

D’Andrea

Tozzo

Boschetto³

et al. 2013

MAS

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The interlayer bond strength between binder and wearing course and several possible treatments of enhancing the contact surface roughness and the interlocking are investigated. For this purpose, conventional methods, such as shear tests, but also laser image acquisition of the binder upper surface have been used. The mechanical outcomes of a shear test device and the binder surface roughness parameters, have been compared looking for a relation between the shear performance and the surface characteristics. The comparison between the roughness average and the root mean square of the profile heights with the maximum shear stress shows the achievement of the same strength level for treatments with similar roughness parameters, as proved by the statistical analysis. Furthermore, the comparison between the roughness parameter kurtosis and the maximum height of the profile with the slope of the response curve before the peak and residual shear stress, demonstrates a better locking for more high peaks.

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Evaluation of Interlayer Shear Bond Devices for Asphalt Pavements

Cited by 57 publications

References 8 publications

Review of glass fibre grid use for pavement reinforcement and APT experiments at IFSTTAR

Review of glass fibre grid use for pavement reinforcement and APT experiments at IFSTTAR

Test Method to Evaluate the Effect of Interface Bond Conditions on Top-Down and Reflective Cracking

Interface Roughness Parameters and Shear Strength

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