The Canadian Highway Bridge Design Code (S6-14, 2014) considers a service life of 75 years for newly constructed bridge. What does this mean in engineering terms? It means that the bridges of the future should have satisfactory performance, both durability and structural, during the proposed life-cycle. This can be quite challenging when we look closely; the environment and environmental loading (i.e. snow, freeze and thaw cycles, corrosion, earthquakes, etc.) can… Read More »The Future of Bridge Inspection
In this article, we will briefly present and discuss Impact-Echo (IE) method for testing concrete structures. The concept behind the technique will be reviewed. We will also study the applications and limitation of the IE method and How to Test Concrete Using Impact-Echo Method. The test method was adapted as a standard test procedure by the American Society of Testing Materials (ASTM C1383) (1), “Standard Test Method for Measuring the P-Wave… Read More »How to Test Concrete Using Impact-Echo Method?
Share on linkedin Share on facebook Share on twitter Share on telegram Share on whatsapp Share on email Concrete Imaging and Scanning are used to assess the location and extent of sub-surface defects. Different non-destructive test methods have been developed and used over the past few decades. The following article briefly describes some of these methods, and their application in the structure inspection and structural condition assessment. What is Concrete… Read More »NDT Methods for Concrete Imaging and Scanning
In a bridge structure, abutment refers to the substructure unit which supports the end of the structure (bridge span) and retains the approach fill (see Ontario Structure Inspection Manual). Abutments are commonly made of mass concrete, reinforced concrete, or wood. Usually, abutments consist of a number of components: + Foundation + Abutment wall + Ballast wall + Wing walls + Bearing seats. (Image on the right: Adapted from OSIM, 2008) Abutments can… Read More »How to Evaluate Bridge Abutments?
The collapse of Ponte Morandi in Genoa, Italy (read more) and Florida International University pedestrian bridge (read more) have raised concerns about the safety and reliability of existing and new bridge structures. common Defects in bridge structures can affect the overall safety of the bridge structures. Different deterioration mechanisms can lead to major defects. Exiting infrastructure in developed countries are nearing the end of their initial service life design. According to the… Read More »Common Defects in Bridge Structures
In this article, we will briefly review how to Estimate Strength of Concrete Using NDT Methods. Compressive strength of concrete is by far the most important property of concrete. It represents the mechanical properties of concrete; for example, the 28 days compressive strength of concrete cylinders is the key parameter in most design codes (ACI 318-14, CSA A23.3-14). Concrete strength is found to have reasonable relationship with certain durability parameters of concrete.… Read More »How To Estimate Strength of Concrete Using NDT Methods?
Pile Integrity Testing (PIT) is a non-destructive testing method for evaluating the unknown length and integrity of piles and deep foundations. The basic concept behind the technique is determining the velocity (required) and force (optional) response of pile induced by an impact device (normally, a handheld hammer). Pile Integrity Testing works best for long structural component such as driven concrete piles, cast-in place concrete piles, concrete filled steel pipe piles, timber piles,… Read More »Practical Considerations in Pile Testing
Pile Integrity Test can be used to determine the integrity of piles. The method works best for long structural component such as driven concrete piles, cast-in place concrete piles, concrete filled steel pipe piles, timber piles, structural columns. The method works based on measuring and analyzing the velocity (required) and force (optional) response of pile. A hammer (regular or instrumented) is used to impact the pile surface and induce acoustic waves… Read More »Applications and Limitations of Pile Integrity Test
Non-destrcutive Testing- NDT Methods for Evaluation of Parking Garages can help improve the quality of routine inspection and maintenance. Parking garages require routine inspection and maintenance to ensure they remain safe and operational. Weather it is a public parking in extremely busy downtown areas, or a private condominium structure, proper maintenance is needed to keep them safe. The importance of parking garages is often ignored, simply because nobody lives in… Read More »NDT Methods for Evaluation of Parking Garages
A corroded structure (whether it is a bridge, or a jetty, or a simple ramp) could be scary for many people. Imagine yourself driving along the Gardner Express (Downtown Toronto), or the highway 40 (Montreal), and all of a sudden, a piece of concrete falls onto your car, breaking the windshield. Feels scary? Indeed! A corroded structure makes you feel so unsafe, even if it is in stable condition. This… Read More »Corrosion Monitoring of Reinforced Concrete Structures