Best Civil, Structural and Environmental Engineers near Ajax, ON

Cracks happen for a wide range of reasons. Two important characteristics of concrete crack is the crack width and crack depth. The width of a crack can normally be measured using a ruler or crack gage. The depth of crack requires Ultrasonic Pulse Velocity Testing . Crack depth measurement is important when evaluating the durability performance of a structure.

There are a wide variety of NDT methods that can be implemented depending on the specifications of the assignment. In general, Ultrasonic Pulse Velocity (UPV) involve sending ultrasonic waves through concrete to detect changes in density and identify anomalies. The velocity of the waves can indicate the concrete's uniformity and potential issues such as voids, cracks, or variations in composition. Ultrasonic Pulse Echo (UPE) is used to detect the depth and location of flaws such as delaminations or voids. Rebound Hammer (RH) measures the surface hardness of concrete by rebounding a mass off the surface.

Ground Penetrating Radar (GPR) is the most effective way to locate steel rebar in typical concrete slab and wall and wall settings. A high frequency device, such as 1000 MHz or more is prefered for this application. Additionally a common covermeter can also be useful tool to locate rebar depending on the rebar layout.

Cross Hole Sonic Logging (CSL) is commonly used for assessing the integrity and quality of deep foundation elements such as piles. However, not all types of piles are suitable for CSL testing. CSL requires access to the interior of the pile, therefore the construction design must include the installation of access tubes or pipes that connect the top and bottom of the pile.

Yes, in general it is significantly more advantageous for clients to commision multiple NDT tests to be taken on the same component. Because each test method has its own level of uncertainty and limitations, it is prefered to have numerous tests taken to form a more comprehensive report.