Fast Falling Weight Deflectometer (FastFWD) for Accelerated Pavement Testing (APT)

Manosalvas-Paredes, Mario; Comes, Albert Navarro; Francesconi, Marco; Khosravifar, Sadaf; Ullidtz, Per

doi:10.1201/9781315100333-296

Cited by 2 publications

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“…Some recent studies have shown that the FastFWD could be used as an intermediate tool between small-scale laboratory tests (bending beam, shear, and triaxial tests) and full-scale accelerated pavement tests to characterize material for road use and consequently estimate the useful life of a road pavement [ 10 , 11 , 12 , 13 ].…”

Section: Methodsmentioning

confidence: 99%

Preliminary In-Situ Evaluation of an Innovative, Semi-Flexible Pavement Wearing Course Mixture Using Fast Falling Weight Deflectometer

et al. 2018

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In the last forty, years semi-flexible pavements have been successfully employed, especially in those areas subjected to heavy and slow-moving loads. They usually comprise a wearing course of Grouted Macadam, a composite pavement material that provides significant advantages in comparison to both concrete and asphalt pavements. On the other hand, the laying process of this material is a two-stage operation, and the realization complexity leads to long realization times and high initial costs. Therefore, the use of semi-flexible pavements has been limited to some fields of application and areas. Recently, an innovative material has been developed to be used as an alternative to Grouted Macadam for semi-flexible pavement wearing course realization. This material should provide similar or even superior characteristics compared to traditional Grouted Macadam. This will reduce semi-flexible pavement construction time and avoid the need for dividing the laying process. This paper presents an experimental program involving the use of FastFWD, as an APT device, to evaluate in-situ properties and performance of this material. The achieved results regarding the validation of this new material by means of FastFWD appear promising both in terms of the material’s properties and resistance to dynamic load repetitions.

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Section: Methodsmentioning

confidence: 99%

Preliminary In-Situ Evaluation of an Innovative, Semi-Flexible Pavement Wearing Course Mixture Using Fast Falling Weight Deflectometer

et al. 2018

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Validation of a Novel Sensing Approach for Continuous Pavement Monitoring Using Full-Scale APT Testing

Manosalvas-Paredes

Aono

Chakrabartty

et al. 2023

J. Transp. Eng., Part B: Pavements

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The objective of this paper is to present a novel approach for the continuous monitoring of pavement condition through the use of 7 combined piezoelectric sensing and novel condition-based interpretation methods. The performance of the developed approach is validated 8 for the detection of bottom-up fatigue cracking through full-scale accelerated pavement testing (APT). The innovative piezoelectric sensors 9 are installed at the bottom of a thin 102 mm (4 in.) 4 asphalt layer. The structure is then loaded until failure (up to 1 million loading cycles in this 10 study). The condition-based approach, used in this work, does not rely on stain 5 measurements and allows users to bypass the need for any 11 structural or finite-element models. Instead, the data compression approach relies on variations in strain energy harvested by smart sensors to 12 track changes in material and structural conditions. Falling weight deflectometer (FWD) measurements and visual inspections were used to 13 validate the observations from the sensing system. The results in this paper present a first large-scale validation in pavement structures for a 14 piezopowered sensing system combined with a new response-only based approach for data reduction and interpretation. The proposed data 15 analysis method has demonstrated a very early detection capability compared to classical inspection methods, which unveils a huge potential 16 for improved pavement monitoring.

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Fast Falling Weight Deflectometer (FastFWD) for Accelerated Pavement Testing (APT)

Cited by 2 publications

References 0 publications

Preliminary In-Situ Evaluation of an Innovative, Semi-Flexible Pavement Wearing Course Mixture Using Fast Falling Weight Deflectometer

Preliminary In-Situ Evaluation of an Innovative, Semi-Flexible Pavement Wearing Course Mixture Using Fast Falling Weight Deflectometer

Validation of a Novel Sensing Approach for Continuous Pavement Monitoring Using Full-Scale APT Testing

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