Nondestructive Evaluation
Nondestructive Evaluation (NDE) is an indispensable tool providing non-invasive methods to assess the status of a structure as well as the extent of damage or defects. These techniques go beyond visual inspection, offering valuable insights into conditions that may not be observable to the naked eye.
Comprehensive investigation for structural problems involves a well-balanced combination of visual inspection, NDE/NDT, laboratory testing, and minimally destructive material sampling. This approach is not only cost-effective but also yields more comprehensive and insightful results compared to traditional investigation methods.
Common Applications:
- Concrete Strength Evaluation: NDT methods, such as the rebound hammer test (Schmidt hammer) and the ultrasonic pulse velocity (UPV) test, are employed to estimate the compressive strength of concrete. These tests help in assessing the structural capacity and potential need for repairs or rehabilitation.
- Detection of Voids and Delaminations: Ground-penetrating radar (GPR) and ultrasonic testing are used to detect voids, honeycombing, and delaminations within concrete structures. Early identification of such defects can prevent further deterioration and ensure the structural integrity of the element.
- Reinforcement Location and Corrosion Detection: NDT techniques like magnetic particle testing, cover meter, and half-cell potential measurement are used to locate and assess the condition of steel reinforcements in concrete. This helps in evaluating the risk of corrosion and planning preventive measures.
- Thickness Measurement: Ultrasonic pulse echo testing and radar-based techniques are employed to measure the thickness of concrete elements such as slabs, walls, and columns. This information is essential for structural assessment and repair planning.
- Crack Detection and Width Measurement: Visual inspection combined with methods like crack mapping, digital image analysis, and laser scanning can provide valuable information about the extent and width of cracks in concrete structures.
- Moisture Content and Permeability Assessment: NDT methods like electrical resistivity and moisture meters are used to evaluate the moisture content and permeability of concrete. This is crucial for assessing the durability and susceptibility to environmental degradation.
- Detection of Alkali-Silica Reaction (ASR): NDT techniques are employed to identify the presence and extent of ASR in concrete, a chemical reaction that can lead to internal expansion and cracking over time.
- Concrete Quality Control in Production: NDT is used in the production process to assess the quality of fresh concrete and ensure it meets design specifications.
- Evaluation of Concrete Repair and Rehabilitation: After concrete repair and rehabilitation works, NDT methods can be employed to verify the effectiveness of the repair and assess its compatibility with the existing structure.
Our team possesses the versatility, in-depth knowledge, and vast experience to execute your structural evaluation program incorporating NDE/NDT with utmost precision and accuracy. By integrating these advanced methods into our evaluation procedures, we ensure that you receive the highest quality service and actionable insights for making informed decisions regarding the safety, reliability, and longevity of your engineered assets.