Concrete evaluation and testing has become a staple of construction projects. This analysis is imperative to ensure that the concrete will perform its intended purpose over time. There are several tests that can be used to determine the quality and strength of the existing concrete, some of which are destructive like cores and compression test, and others that are non- destructive testing. Some of the most common forms of non-destructive testing of existing concrete are Rebound Hammer Testing (Schmidt Hammer), Windsor Probes Testing and Concrete Core Testing.
Rebound Hammer Testing or Schmidt Hammer is a non-destructive concrete analysis used to estimate the strength and uniformity of the existing concrete. This method utilizes a spring-loaded hammer which is released and impacted with the concrete surface, an indictor records the distance the hammer bounces back on a linear scale. The indictor is then referenced to a compressive strength chart to establish a relative compressive strength (PSI value). This method can be used to quickly evaluate large areas and potentially narrow down areas with potential problems.
Windsor Probe Testing is one of the most effective and economical non-destructive testing methods available today and offers the most reliability of all non-destructive test methods. This method utilizes a hardened steel probe that is driven into the concrete by a powder actuated charge which penetrates the surface of the concrete. The depth of penetration of the probe is then measured and by utilizing the manufacturers Moh’s Hardness chart and a compressive strength values can then be established. The simplicity of use, the accuracy of testing and one of the most cost-effective test methods makes Windsor Probe Testing one of the most widely used non-destructive test methods in the industry.
Concrete Coring Testing is considered a destructive test method; however, this method offers the most definitive results for determining the compressive strength of existing concrete. This method is performed by first extracting a concrete core from the existing concrete structure. The concrete is then brought back to the lab for compressive strength testing and evaluation. This method offers a direct PSI values of the existing in-place concrete and is typically considered the final or the most acceptable method for acceptance of hardened concrete in the industry.
Utilizing one or more of these concrete testing procedures is an invaluable way to determine the quality of the existing concrete. The experts at Concrete Solutions are well versed in these and other methods of concrete testing. Our expertise, combined with a state-of-the-art laboratory at our disposal, make them an obvious choice for a variety of concrete testing needs.
To find out more about our Non-destructive and destructive concrete testing services or to schedule an appointment in the New York City or Long Island areas, fill out our contact form or give us a call at (631) 393-6520.