Rebound Hammer Test: Definition, Procedure, and Applications

Introduction

Rebound hammer test is an essential procedure in the construction industry to evaluate the strength of a concrete structure. The test provides valuable insights into the quality and durability of the concrete. In this article, we will discuss the definition, procedure, and applications of the rebound hammer test.

Definition of Rebound Hammer Test

The rebound hammer test is a non-destructive testing method used to determine the strength of a concrete surface by measuring the rebound of an instrumented hammer from the concrete surface. The rebound hammer test also called the Schmidt hammer test, was invented by Ernst Schmidt in 1948.

Procedure of Rebound Hammer Test

The procedure of rebound hammer test involves the following steps:

• Clean the concrete surface and remove any loose particles from it.
• Place the instrumented hammer perpendicular to the concrete surface.
• Press the instrumented hammer against the concrete surface and then release it.
• The hammer bounces back and the rebound distance is measured by the instrument.
• The test is repeated at different locations on the concrete surface and the average rebound value is calculated.

Applications of Rebound Hammer Test

The rebound hammer test has a wide range of applications in the construction industry, including:

• Quality control of concrete at the construction site.
• Determining the compressive strength of concrete.
• Assessing the uniformity of the concrete surface.
• Assessing the effectiveness of concrete repair procedures.
• Assessing the curing and hardening of concrete.

Conclusion

The rebound hammer test is a simple and useful procedure for evaluating the strength and quality of concrete. It provides a quick and non-destructive way to assess the surface of concrete structures. By following the proper procedure, the rebound hammer test can provide accurate and valuable results for the construction industry.