Campus Units

Civil, Construction and Environmental Engineering, Electrical and Computer Engineering, Center for Nondestructive Evaluation (CNDE)

Document Type

Conference Proceeding

Conference

ASNT Annual Conference 2017

Publication Version

Published Version

Publication Date

10-30-2017

Journal or Book Title

2017 Annual Conference Proceedings

First Page

253

Last Page

265

Research Focus Area

Structural Engineering

Conference Title

2017 Annual Conference Proceedings

Conference Date

October 30-November 2, 2017

City

Nashville, TN

Abstract

The authors recently investigated the use of conductive concrete to enhance nondestructive evaluation (NDE) capa- bilities. Preliminary results have shown that a conductive concrete can facilitate the utilization of an eddy current technique, where damages in a conductive specimen were easier to detect compared with a non-conductive substrate. While such results demonstrated the promise of using conductive concrete to facilitate and potentially accelerate the NDE process, the fabrication of an homogeneous conductive concrete is technically or economically challenging, depending on the conductive filler used in the process. In this paper, we propose a new cementitious composite to accelerate NDE. The composite uses inexpensive carbon black particles (CB) and a block-copolymer. The purpose of the block co-polymer, a styrene-ethylene-butylene-styrene (SEBS), is to facilitate the creation of conductive chains, therefore reducing the necessary concentration of conductive filler required to achieve electrical percolation. Several cementitious composite specimens of various concentrations of CB are fabricated, and results show that the utilization of SEBS reduces the electrical percolation threshold by approximately 50% with a gain on electrical conductivity relative to a non-conductive specimen mix of approximately 33%. Strain-sensing tests also demonstrate that SEBS-based specimens have good sensing properties, but lag behind those of conductive concrete specimens fabricated with CB only.

Comments

This article is published as Pinto, Irvin, Kejin Wang, Simon Laflamme, David Eisenmann, Akira DeMoss, and Filippo Ubertini. "Smart Concrete for Enhanced Nondestructive Evaluation." In 2017 Annual Conference Proceedings, pp. 253-265. ASNT Annual Conference, Nashville, TN, October 30–November 2, 2017. ISBN: 978-57117-436-9. Posted with permission.

Copyright Owner

The American Society for Nondestructive Testing, Inc.

Language

en

File Format

application/pdf

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Article Location

 
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