NDE of Concrete Dams

4 Methods for Nondestructive Evaluation of Concrete Dams

Appropriate operation and maintenance of concrete dam structures are essential to ensure the safety of the structure, and reducing risk. Concrete surfaces should be examined in a regular basis to identify spalling and deterioration due to weathering, or extreme stresses, or other physical, or chemical damage mechanism. Nondestructive Evaluation of Concrete Dams can provide useful information about the Read more about 4 Methods for Nondestructive Evaluation of Concrete Dams[…]

Crack Depth Measurement in Concrete-Feature Pic

3 Methods for Crack Depth Measurement in Concrete

Evaluation of existing surface cracks is normally done during the visual inspection of structures. Crack opening on the surface of concrete is normally measured using a crack gauge. Depending on the opening of the cracks on the surface, cracks can be described (as tiny as hairline, or cracks with a few millimeters opening); however, this Read more about 3 Methods for Crack Depth Measurement in Concrete[…]

Half Cell Corrosion Potential Mapping

Half Cell Corrosion Mapping for Concrete

Half Cell corrosion mapping is an effective method for assessing the severity of corrosion activity in concrete structures. It is the most well-known procedure to identify the likelihood of active corrosion; however, the test does not provide any information about the kinetics of corrosion activity. The easy and cost-effective procedure of the test makes it popular Read more about Half Cell Corrosion Mapping for Concrete[…]

ultrasonic testing of concrete

Ultrasonic Testing of Concrete

Ultrasonic Pulse Velocity (UPV) is an effective non-destructive testing (NDT) method for quality control of concrete materials, and detecting damages in structural components. The UPV methods have traditionally been used for the quality control of materials, mostly homogeneous materials such as metals and welded connections. With the recent advancement in transducer technology, the test has Read more about Ultrasonic Testing of Concrete[…]

acoustic emission for structural health monitoring

Acoustic Emission Monitoring for Civil Infrastructure

Acoustic Emission is referred to the radiation of acoustic waves in solids as a result of damage or any irreversible change in its internal structure. Acoustic emission monitoring is well-known for its application in structural health monitoring of civil infrastructure. Structural Health Monitoring Health monitoring is a process of implementing inspection, evaluation, reaction, re-inspection and re-evaluation in Read more about Acoustic Emission Monitoring for Civil Infrastructure[…]

NDE-concrete piles

How to Evaluate Concrete Piles?

Structure inspection manuals such as the Ontario Structure Inspection Manual (OSIM) mostly emphasizes on the visual inspection and physical condition of bridge structures. The visual inspection methodology in this guideline consists of close up visual assessment of defects in the superstructure and substructure. This methodology is limited to inspection of elements that are at the arms Read more about How to Evaluate Concrete Piles?[…]

Ultrasonic Testing of Anchor Bolts

Ultrasonic Testing of Anchor Bolts

Corrosion inspection of structural anchor bolts can be quite challenging. The reason is that access to these buried elements is often very difficult. The visible part of the bolt is usually in poor quality, and mechanical tests such as pull-out is not an option. Non-destructive ultrasonic testing of anchor bolts provide a very good method Read more about Ultrasonic Testing of Anchor Bolts[…]

Concrete Coring Structure Inspection

Main Challenges of Concrete Coring

Taking core samples from concrete structures is required for comprehensive assessment of durability and structural performance of the structure. The compression test on core samples is known as the most reliable method for assessing the compressive strength and a means of quality control. The procedure for taking core samples and testing them has been standardized Read more about Main Challenges of Concrete Coring[…]

electrical resistivity of concrete

Electrical Resistivity of Concrete

The use of electrical resistivity method for quality control and evaluation of concrete durability is becoming very popular among scholars and engineers. The measurement of electrical resistivity of concrete provides useful information about the microstructure of concrete material. The test procedure has since been standardized by AASHTO TP 95. This method is adapted by several Department of Transportation Read more about Electrical Resistivity of Concrete[…]

Thickness Measurement of Concrete

NDT of Thickness Measurement for Concrete

This articles reviews some of the most accepted and widely used nondestructive tests of thickness measurement for concrete elements. Thickness measurement can be of interest for engineers and technicians involved in the assessment of existing concrete elements, such as slabs, foundations, or pavements, or as a means of quality control (QA) in the construction of Read more about NDT of Thickness Measurement for Concrete[…]