A review is presented of nondestructive test (NDT) methods for evaluating the condition of concrete and steel reinforcement in structures. Methods discussed include visual inspection, stresswave, nuclear, measurement of fluid transport properties, magnetic and electrical, infrared thermography, and ground-penetrating radar. The principle of each method is discussed and the typical instrumentation described. Testing procedures are summarized and the data analysis methods explained. The advantages and imitations of the methods are highlighted. This report concludes with a discussion of planning a NDT program. General information is provided for those faced with the task of evaluating the condition of a concrete structure and who are considering the applicability of NDT methods to aid in that evaluation.
Keywords: covermeter; deep foundations; half-cell potential; infrared thermography; nondestructive testing; polarization resistance; radar; radiography; radiometry; stress-wave methods; transport properties; visual inspection.
Table of Contents
1.2—Needs and applications
CHAPTER 2—NOTATION AND DEFINITIONS
CHAPTER 3—SUMMARY OF METHODS
3.2—Stress-wave methods for structures
3.3—Low strain stress-wave methods for deep foundations
3.5—Magnetic and electrical methods
3.6—Methods for measuring transport properties
CHAPTER 4—PLANNING AND PERFORMING NONDESTRUCTIVE TESTING INVESTIGATIONS
4.1—Selection of methods
4.2—Defining scope of investigation
4.3—Numerical and experimental simulations
4.4—Correlation with intrusive testing
APPENDIX A: THEORETICAL ASPECTS OF MOBILITY PLOT OF PILE
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