Interface Roughness Parameters and Shear Strength

D’Andrea, Antonio; Tozzo, Cristina; Boschetto, Alberto; Bottini, Luana

doi:10.5539/mas.v7n10p1

Cited by 21 publications

(2 citation statements)

References 14 publications

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“…The Sapienza direct shear testing machine was designed and developed at the Road Materials Lab at Sapienza University in Rome. It represents the evolution of a previous prototype (26) and was improved to function better under dynamic loading. Special features were designed to allow the placement of the device under dynamic loading as well as to allow the shear sliding of one half-specimen against the other.…”

Section: Test Devicementioning

confidence: 99%

Prediction of Fatigue Failure at Asphalt Concrete Layer Interface from Monotonic Testing

Tozzo

D’Andrea

Al‐Qadi

2015

Transportation Research Record: Journal of the Transportation R

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This study investigated the characterization of interface shear behavior in asphalt concrete through the estimation of the stress ratio (SR). This parameter, originally identified as the ratio between predicted interface stress from a finite element model (FEM) and interface shear strength at the corresponding normal stress, was assumed to be dynamic. As part of the experimental plan, monotonic tests on double-layered asphalt specimens were performed. Dynamic evaluations of the number of repetitions to failure under several stress conditions, equal to or higher than stresses computed from an FEM of the pavement structure, were also performed. The failure curves of the two testing modalities show similar patterns on the Mohr plane. The Hoek–Brown shear strength failure criterion and the three-dimensional surface that best fits the dynamic outcomes\ud were considered. In this scenario, the SR referred to the proportion between the applied shear stress conditions in the dynamic modality and the maximum stress from monotonic tests. For the same predicted failure repetitions, SR assumed a constant value. Correlating monotonic and dynamic results could be an important approach both in furthering knowledge of interface shear strength and in predicting information\ud about failure under repetitive loading applications based on simple monotonic tests

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Section: Test Devicementioning

confidence: 99%

Prediction of Fatigue Failure at Asphalt Concrete Layer Interface from Monotonic Testing

Tozzo

D’Andrea

Al‐Qadi

2015

Transportation Research Record: Journal of the Transportation R

Self Cite

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“…[8,9] However, it is evident that the morphology of the contact surfaces plays a crucial role in determining the strength between layers. [10,11] Surface or texture characteristics in pavements are parameters that traditionally have been studied in pavement surface layers, given their relevance in the interaction with the tire. This interaction results in noise generation, friction, skid resistance, tire wear and other outcomes.…”

Section: Introductionmentioning

confidence: 99%

Characterization of interlayer bonding mechanism based on interface morphology between asphalt mix and electronics devices covers materials

Boada-Parra,

Apaza,

Gulisano

et al. 2023

Earth Resources and Environmental Remote Sensing/Gis Applications XIV

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The electrification and digitalization of transportation is one of the most important challenges in achieving sector decarbonization, which is responsible for nearly one-fifth of greenhouse gas emissions in Europe. One of the issues related to road electrification is the adherence between pavement surfaces and embedded electronic devices (sensors, charging units, etc.). This study presents a methodology for evaluating the adherence between asphalt surfaces and electronic elements, characterizing the morphology of surfaces using a laser scanner as a Non-Destructive Testing (NDT) technique. The main objective is to optimize the application of tack coat and define the appropriate adhesive type based on the specific surface type present on the road. Adherence tests were conducted using various types of adhesives with different surface morphologies, including asphalt mixtures and materials for electronic device coating. Surface texture measurement was performed using a laser scanner. The results of this study have direct implications for ecologically sustainable and efficient road management. Optimizing the application of tack coat based on texture measurement allows for timely maintenance interventions. Additionally, the incorporation of embedded electronic elements in the pavement for continuous monitoring of road conditions contributes to more sustainable and efficient management practices. Overall, this research provides valuable insights into adherence between asphalt surfaces and embedded electronic devices. The methodology utilizing a laser scanner offers a promising approach for optimizing adherence and contributing to efficient road management.

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Reliance of Pavement Texture Characteristics on Mix-Design and Compaction Process

et al. 2015

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The surface texture in Hot Mix Asphalt (HMA) pavements has an important role respect to all functional performances: wet and dry friction, rolling noise generation, tire wear, and so on. The texture of a new pavement is a consequence of HMA composition (mix-design) and of construction techniques, especially considering the compaction process. While numerous studies have investigated the effect of mix design on texture, it is still unclear the effect of construction techniques. In this research, some experimental results coming from on-site investigations during the HMA construction, were processed, in order to determine the texture characteristics of pavement surfaces, in terms of mega, macro and micro-texture, using both volumetric and profilometric measures. Furthermore, the asphalt mix composition (grain size, void ratio, bulk density, percentage of bitumen, etc.) were assessed on pavement cores. Some statistical correlations between texture and asphalt mix composition were also carried out. The results confirm that the main influence on the pavement texture level is related to the aggregate maximum dimension, but also the void percentage has a significant influence. The compaction conditions, instead, seem to determine a lower effect, but nevertheless some observations can be deducted. More general, the presented

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Interface Roughness Parameters and Shear Strength

Cited by 21 publications

References 14 publications

Prediction of Fatigue Failure at Asphalt Concrete Layer Interface from Monotonic Testing

Prediction of Fatigue Failure at Asphalt Concrete Layer Interface from Monotonic Testing

Characterization of interlayer bonding mechanism based on interface morphology between asphalt mix and electronics devices covers materials

Reliance of Pavement Texture Characteristics on Mix-Design and Compaction Process

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