BS EN 12504-2 PDF

Specifies a method for determining the rebound number of an area of hardened concrete using a spring-driven steel hammer. Covers: apparatus; test location; procedure; test results and report; and precision. Their committees work with the manufacturing and service industries, government, businesses and consumers to facilitate the production of British, European and International standards. NBS has produced specification systems and information products for construction industry professionals for more than 40 years.

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The rebound Schmidt hammer is one of the oldest and best known methods of comparing the concrete in various parts of a structure and indirectly assessing concrete strength. It is actually a measure of surface hardness. The rebound hammer should be considered as a means of determining variations of strength within a structure rather than an accurate means of assessing strength.

The surface under test should be clean and smooth. Dirt or other loose material on the surface can be removed using a grinding stone prior to the test. Rough surfaces cannot be tested as they do not give reliable results. If it is to be used as a means of assessing strength the correlation between rebound hammer reading and strength needs to be determined for the actual concrete under investigation.

The values obtained by using the hammer may be influenced by the particular operator, so care must be taken when considering results from different operators. TR54 Diagnosis of deterioration in concrete structures- identification of defects, evaluation an. Guide to testing and monitoring the durability of concrete structures. Membership Membership Benefits of Membership Join here. Overview Qualifications Events calendar. Magazine Concrete From the editor. About us. Concrete your Fingertips Full list of Nuggets.

Return New search Print e-mail a friend. Rebound hammer The rebound Schmidt hammer is one of the oldest and best known methods of comparing the concrete in various parts of a structure and indirectly assessing concrete strength. Acknowledgement : The Concrete Society.

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BS EN 12504-2

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This European Standard specifies a method for determining the rebound number of an area of hardened concrete using a spring-driven hammer. NOTE 1 The rebound number determined by this method can be used to assess the uniformity of concrete in situ, to delineate zones or areas of poor quality or deteriorated concrete in structures. NOTE 2 The test method is not intended as an alternative for the compressive strength determination of concrete EN , but with suitable correlation, it can provide an estimate of in situ compressive strength. For the assessment of in-situ compressive strength see EN NOTE 3 The hammer may be used for comparative testing, referenced against a concrete with known strength or against a concrete which has been shown that it has come from a defined volume of concrete with a population verified as conforming to a particular strength class. Multi-user access to over 3, medical device standards, regulations, expert commentaries and other documents. Worldwide Standards We can source any standard from anywhere in the world.

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The rebound Schmidt hammer is one of the oldest and best known methods of comparing the concrete in various parts of a structure and indirectly assessing concrete strength. It is actually a measure of surface hardness. The rebound hammer should be considered as a means of determining variations of strength within a structure rather than an accurate means of assessing strength. The surface under test should be clean and smooth.

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