5-7 December 2018 - Hong Kong, China

CONFERENCE PAPERS

Ninth International Conference on Advances in Steel Structures (ICASS 2018)


IDENTIFICATION OF PITTING CORROSION IN STEEL BARS AND REBARS EMBEDDED IN CONCRETE USING ULTRASONIC GUIDED WAVES

 

Rajeshwara C. Sriramadasu 1, 2, 3, Ye Lu 2* and Sauvik Banerjee 3

1 IITB-Monash Research Academy, Indian Institute of Technology Bombay, Powai, Mumbai 400076 – India

E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

2 Department of Civil Engineering, Monash University, Clayton, VIC 3800 - Australia

E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

3Department of Civil Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076 - India

E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

DOI:10.18057/ICASS2018.P.163

ABSTRACT:

In this paper ultrasonic guided waves generated by surface bonded piezoelectric wafer transducers (PWTs) are deployed to identify localised corrosion in steel bars, which is simulated in the laboratory using the impressed current method. It is observed that flexural mode F(1,1) has high sensitivity to the corrosion in simple steel bars as well as embedded steel reinforcement bars (rebars). The variation of group velocity of F(1,1) mode for various level corrosion is studied. Group velocity has direct linear correlation with the mass loss in steel bars while corrosion in embedded rebars has a complex nature. However, various phases of corrosion in embedded steel rebars can still be interpreted using the change in wave velocity.

Keywords:

Corrosion; Guided waves; Piezoelectric wafer transducers (PWTs); Steel bars; Flexural mode; Impressed current method.

Download PDF:

IMPORTANT DATES

First call for paper:
1 January 2018
Abstract submission: (CLOSED)
1 April 2018
Notification of abstract acceptance:
on or before 16 April 2018 
Full paper submission: 
15 July 2018
Online Registration Begins:
1 August 2018
Notification of full paper acceptance:
31 August 2018
Early bird registration:
on or before 7 September 2018
Online Registration Closes:
31 October 2018
Announcement of programme:
1 November 2018
ICASS2018 December 05, 2018 08:00 AM Time's Up