Published on 11-Aug-2023

Rebound Hammer Test On Concrete — Explained In Detail

Rebound Hammer Test On Concrete — Explained In Detail

With the utilization of the non-destructive "rebound hammer test," the impressive strength of the concrete can easily be determined. Yes, do you want to know more about it? So, in today's article, we will discuss the rebound hammer test in detail. Read the entire article to learn about this non-destructive testing method. 

Rebound Hammer — What Is It? 

Rebound hammers, also known as Concrete Test Hammer, Swiss Hammers, and Schmidt Hammers, which are multipurpose equipment utilized to examine the integrity and quality of hardened concrete. Even if its primary purpose is to specify the compressive strength of the concrete, rebound hammers have many more things to offer. 

Nonetheless, when evaluating a concrete building or structure, strength is not the only point that must be focused on! The hammers are simple to utilize worldwide; this says that their results and performances have been reviewed very well. 

What Is Meant By Rebound Hammer Test? 

When it comes to the rebound hammer test, it proves itself the best in the matter of quick & effective collection of information on the homogeneity & quality of concrete in freshly created buildings or those that have been there for years. It is a direct testing process that tends to provide a straightforward picture of the condition of the concrete, catches attention towards the parts with less strength, and highlights the regions that have been harmed by fire or something else. It becomes simple to grab hold of better compressive strength values utilizing correlation data from laboratory experiments. 

When the hardened concrete is striked with the help of a test hammer's piston, a spring mechanism is then loaded until & unless it trips, which results in releasing the hammer mass. Moreover, an already determined energy quantity is transferred from the mass when it strikes the piston to the concrete. The rebound number value, also known as the R-value, is recorded by a simple linear scale because the hammer mass slips along an indicator. When compared to the results from laboratory experiments, Schmidt found that these surface hardness values may display relative strength. 

The Major Purpose Of Conducting The Rebound Hammer Test


The rebound hammer test is created to achieve the following goals & objectives, as stated by the Indian code IS: 13311(2)-1992:

  1. To draw a comparison between the qualities of one component and those of another. 

  2. To find out the consistency of the concrete. 

  3. To specify the concrete's quality by following the standard requirements. 

  4. It can be utilized to distinguish between the construction parts that are acceptable & problematic and also, to compare the compressive strength of two different structures. 

  5. Determine the strength by connecting the impressive power and the rebound index. 


Advantages And Disadvantages Of Rebound Hammer Test 

The rebound hammer test is utilized widely to specify the strength of concrete, and today, it is a matter of subject everywhere. When defining the strength of concrete by implying the rebound hammer test, the researchers give different opinions or facts. However, every single thing has its pros & cons, and we will learn about that today!

Let's first look at the advantages of the rebound hammer test :

  • This method is highly utilized to restore historic or valuable structures and buildings. 

  • Equipment and tools used in the rebound hammer testing method are reasonably priced. 

  • When it comes to apparatus, it is straightforward to use. 

  • Helpful in finding surface characteristics of consistency and homogeneity.

Here are the disadvantages of the rebound hammer test: 

  • With this test, no accurate or precise identification of flaws can occur. 

  • The findings are examined based on local junctures. 

  • When it comes to probing and sorting management, it becomes necessary to perform regular maintenance and cleaning. 

  • The outcome of this test does not relate to its capacity for deformation or the tensile's surface strength. 


The rebound Hammer test is a famous non-destructive testing method of concrete that genuinely provides an acceptable, reliable, and instant indication of the compressive strength of the concrete. It does not matter if you choose a simple or advanced measure; the concrete test hammer is efficient, versatile, and reliable. It is proven to be a valuable tool and a time-saver method to help evaluate hardened concrete structures. 

However, We hope that this blog post has helped you understand the rebound hammer test in detail, and hence, to read more, visit our website — OnestopNDT! Also, you can reach out to our team of NDT experts today for any further help.

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