Crack depth determination at large concrete structures using scanning impact-echo-techniques

M. Krüger, C. U. Grosse, H. W. Reinhardt

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Abstract

In reinforced concrete structures concrete cracking is an aspect to be further analyzed, because concrete cracking often results in stiffness loss and also in corrosion of the steel reinforcement. The corrosion rate strongly depends on the crack width and the crack depth so there is the need to measure and to characterize its dimensions. The impact-echo technique is a useful non-destructive test method for the detection of diverse faults in concrete structures. Unfortunately, the existing instruments and analysis tools designed for measurements were lacking of several features in the past detaining the extensive use. A new concept for impact-echo testing systems is presented in this paper. A new device was developed, which is small, robust and easy to handle. The system utilizes advanced impact generation for fast scanning techniques and reproducible impacts. The data acquisition, filtering and visualization of data are optimized for the inspection of large structures with a large number of measurement points. A new option is the estimation of crack parameters like crack depth. In this paper fundamental principles and the combination of the different measurement techniques as well as details of the measurement system are described and some test results are shown.

Original languageEnglish
Title of host publicationProceedings of the 3rd International Conference on Bridge Maintenance, Safety and Management - Bridge Maintenance, Safety, Management, Life-Cycle Performane and Cost
Pages937-939
Number of pages3
Publication statusPublished - 1 Dec 2006
Externally publishedYes
Event3rd International Conference on Bridge Maintenance, Safety and Management - Bridge Maintenance, Safety, Management, Life-Cycle Performance and Cost - Porto, Portugal
Duration: 16 Jul 200619 Jul 2006

Conference

Conference3rd International Conference on Bridge Maintenance, Safety and Management - Bridge Maintenance, Safety, Management, Life-Cycle Performance and Cost
CountryPortugal
CityPorto
Period16/07/0619/07/06

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ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Safety, Risk, Reliability and Quality

Cite this

Krüger, M., Grosse, C. U., & Reinhardt, H. W. (2006). Crack depth determination at large concrete structures using scanning impact-echo-techniques. In Proceedings of the 3rd International Conference on Bridge Maintenance, Safety and Management - Bridge Maintenance, Safety, Management, Life-Cycle Performane and Cost (pp. 937-939)