Damage detection in cemented pavement materials using distributed fibre optic sensors

This paper aims to examine the viability of damage detection in cement stabilised pavement materials (CSPMs) using surface-bonded distributed fibre optic sensors (DFOSs) as a non-destructive monitoring technique. In this study, an optical frequency domain reflectometry (OFDR)-based distributed fibre optic sensing system was exploited to perform continuous real-time distributed strain measurement on CSPM beam samples subjected to cyclic dynamic flexural loading. The beam samples for flexural tests were manufactured using two different locally-sourced pavement materials stabilised with 3% general purpose (GP) cement. The critical response of the cement-treated base (CTB) under standard axle loading (i.e., single axle with dual tyres carrying an axle load of 80 kN) was evaluated using the computer program CIRCLY, and an appropriate load pulse shape that simulates the critical CTB response was then generated to perform stress-controlled cyclic four-point bending tests in the laboratory. The analysis of recorded strain and midspan deflection data showed a fair agreement between experimentally measured and theoretically computed flexural stains in the CSPM beams. Moreover, the evolution of the strain profiles of CSPM beams recorded by DFOSs during cyclic four-point loading undoubtedly demonstrated the capability of DFOSs to detect the initiation and growth of cracks in CSPMs. The findings of this study indicated that the applied flexural stress level significantly influences the initial shakedown of CSPMs. On the basis of the behaviour of CSPMs under different loading conditions, an approach was proposed for the estimation of the design flexural modulus of CSPMs to apply in practical pavement designs.

• Record URL:
  • https://arrbknowledge.com
• Authors:
  • Sounthararajah, A
  • Kodikara, J
• Conference:
  • ARRB International Conference, 28th, 2018, Brisbane, Queensland, Australia
• Publication Date: 2018-5

Language

• English

Media Info

• Pagination: 14p
• Monograph Title: Next generation connectivity: 28th ARRB International Conference, Brisbane, 29 April-2 May, 2018

Subject/Index Terms

• TRT Terms: Accuracy; Bituminous materials; Cement; Cracking; Errors; Fiber optics; Mix design; Pavements; Sensors; Tests for suitability, service and quality
• Uncontrolled Terms: Damages; Pavement technology; Road design and asset management
• Geographic Terms: Australia
• ATRI Terms: Accuracy; Cement; Cracking; Fibre optics; Mix design; Pavement; Pavement evaluation; Sensor
• ITRD Terms: 9115: Detection
• Subject Areas: Pavements; I31: Bituminous Binders and Materials; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 01678412
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, ATRI
• Created Date: Aug 23 2018 2:30PM