Extreme cold weather conditions can significantly affect the quality of concrete, as well as its mechanical properties. In cold weather concreting, one should make sure that all the negative impacts of low ambient temperature are appropriately alleviated by taking the necessary precautions. In this article, we will review important steps that can ensure you will get the quality you are looking for. But first, let’s see what cold temperature is… Read More »Precautions for Cold Weather Concreting
This articles describes how non-destructive testing can help structural engineers in the structural condition assessment of existing buildings, such as parking garages, condominiums, and other constructed facilities. Share on linkedin Share on facebook Share on twitter Share on telegram Share on whatsapp Share on email Structural Condition Assessment usually refers to the process of collecting observations and data about the existing condition of the structure through systematic and scientific methods.… Read More »Nondestructive Testing for Structural Assessment
A multi-technology approach using different Nondestructive Testing (NDT) technologies is becoming the new standard in structural condition assessment. Ground Penetrating Radar has proved to be an effective method in collective key information about the structural details, however, this interesting technology comes with inherent limitations. It is important to develop a good understanding of the capabilities of GPR, and cover its shortcomings with complimentary methods such as the Ultrasonic Pulse based… Read More »How to use GPR in Structural Assessment?
Nondestructive Testing have great applications in the concrete construction industry. It helps designer, construction engineers, and contractors the ability to verify the quality and integrity of built structures, identify and quantify potential defects, and record as-built condition like never before. The author has several years of combined research and industrial experience in helping construction industry in Canada, and has witnessed how NDT can help identify and quantify location and extent of potential… Read More »Applications of Nondestructive Testing in Concrete Construction
Crosshole Sonic Logging is an effective nondestructive testing method for deep foundations. Developed based on the principles of ultrasonic pulse velocity (UPV) test in concrete, the test can address some of the practical limitation that come with length/diameter (i.e. in low strain pile integrity test). The test can be used to collect precise information on the quality and integrity of concrete at different depths. Certain combination of ultrasonic probes enables… Read More »What is Crosshole Sonic Logging?
In this article, we will briefly present and discuss Impact-Echo (IE) method for testing concrete structures. The method has proven to be extremely useful in evaluating the thickness of concrete elements from one side (e.g. tunnel lining, culvert wall, bridge abutment), determining the depth and location of subsurface defects (e.g. cracks, voids, honeycombing, debonding) within concrete, and estimating the depth of surface-opening cracks. The test method was first adapted in… Read More »How to Test Concrete Using Impact Echo (IE) Method ?
In this article, we will review an interesting category of ultrasonic test methods for concrete inspection and testing: Ultrasonic Pulse-Echo (UPE) is widely used for the inspection of concrete elements. The method has proven to be extremely useful in determining the thickness of concrete elements with one side access (i.e. tunnel linings, trunk sewer linings, abutment walls), detect sub-surface defects such as voids, honeycombing, and delamination, and to verify Location… Read More »Ultrasonic Pulse Echo Tomography for Concrete
In this article, and presentation, we are going to describe using non-destructive evaluation of cracking in concrete beams. The main reasons behind cracking is discussed. A systematic approach for evaluating the current condition of the beam is presented. Certain features of concrete cracks, such as the crack width and crack depth are measured using NDT methods. GPR scan is used to determine structural detailing of beam, such as the location… Read More »Non-Destructive Evaluation of Cracking in Concrete Beams
Ground-Borne Vibration can be a serious concern for any building or structure within or adjacent to a construction zone. These structures may be potentially impacted by vibrations emanating from construction activities such as demolition, compaction, excavation, blasting, pile-driving, and operating heavy earth-moving equipment. In extreme cases, the vibration can cause damage to adjacent buildings and create discomfort and annoyance for building occupants. This is a particular concern to heritage structures… Read More »Monitoring of Ground-Borne Vibrations from Construction and Demolition
Share on linkedin Share on facebook Share on twitter Share on telegram Share on whatsapp Share on email Load testing is a common practice among bridge engineers for the assessment of bridge safety and serviceability. Diagnostic load testing is one type of load test methods that can be used either as a means for estimating the load carrying capacity of an in-service bridge or as an acceptance test before the… Read More »Bridge Diagnostic Load Testing