Concrete test hammer
A Schmidt hammer, also known as a Swiss hammer or a rebound hammer, is a device to measure the elastic properties or strength of concrete or rock, mainly surface hardness and penetration resistance.
It was invented by Ernst Schmidt, a Swiss engineer. The Schmidt hammer is distributed by Proceq worldwide.
The hammer measures the rebound of a spring-loaded mass impacting against the surface of the sample. The test hammer will hit the concrete at a defined energy. Its rebound is dependent on the hardness of the concrete and is measured by the test equipment. By reference to the conversion chart, the rebound value can be used to determine the compressive strength. When conducting the test the hammer should be held at right angles to the surface which in turn should be flat and smooth. The rebound reading will be affected by the orientation of the hammer, when used in a vertical position (on the underside of a suspended slab for example) gravity will increase the rebound distance of the mass and vice versa for a test conducted on a floor slab. The Schmidt hammer is an arbitrary scale ranging from 10 to 100. Schmidt hammers are available from their original manufacturers in several different energy ranges. These include: (i) Type L-0.735 Nm impact energy, (ii) Type N-2.207 Nm impact energy; and (iii) Type M-29.43 Nm impact energy.
The test is also sensitive to other factors:
- Local variation in the sample. To minimize this it is recommended to take a selection of readings and take an average value.
- Water content of the sample, a saturated material will give different results from a dry one.
Prior to testing, the Schmidt hammer should be calibrated using a calibration test anvil supplied by the manufacturer for that purpose. 12 readings should be taken, dropping the highest and lowest, and then take the average of the ten remaining. Using this method of testing is classed as indirect as it does not give a direct measurement of the strength of the material. It simply gives an indication based on surface properties, it is only suitable for making comparisons between samples.
This test method for testing concrete is governed by ASTM C805. ASTM D5873 describes the procedure for testing of rock.

This is an excerpt from the article Concrete test hammer from the Wikipedia free encyclopedia. A list of authors is available at Wikipedia.
The article Concrete test hammer at en.wikipedia.org was accessed 29 times in the last 30 days. (as of: 05/25/2014)
Images on Concrete test hammer
Preview image:
Original:
Search results from Google and Bing
9
1
1
HM-71, Concrete Test Hammer - From GIlson…
Concrete test hammers are ideal for fast, inexpensive, nondestructive estimations of in-place concrete strength.
www.globalgilson.com/productdisplay.asp?group=ConcreteTestHammers
1
>30
2
Schmidt hammer - Wikipedia, the free encyclopedia
Testing the compressive strength of a concrete cube using Schmidt hammer ... The test hammer will hit the concrete at a defined energy. Its rebound is ...
en.wikipedia.org/wiki/Schmidt_hammer
2
>30
3
Rebound Hammer – Concrete Rebound Hammer - Proceq
Proceq's concrete rebound hammers include the sophisticated SilverSchmidt ST/ PC, the Original Schmidt for basic testing and the DigiSchmidt for easy ...
www.proceq.com/en/products/concrete-testing/concrete-test-hammer.html
3
>30
4
SilverSchmidt concrete test hammer - Proceq
The Concrete test hammer SilverSchmidt ST/PC features true rebound value and unmatched repeatability. Proceq Concrete test hammer.
www.proceq.com/en/products/concrete-testing/concrete-test-hammer/silverschmidt.html
4
>30
5
NDTT Concrete Hardness Test Hammer HT-225A Portable ...
NDTT Concrete Hardness Test Hammer HT-225A Portable Hardness Tester ( Schmidt Type): Amazon.com: Industrial & Scientific.
www.amazon.com/NDTT-Concrete-Hardness-HT-225A-Portable/dp/B0049DDJCK
5
>30
6
Concrete Test Hammer – SilverSchmidt Concrete Test Hammer
The Concrete test hammer SilverSchmidt ST/PC features true rebound value and unmatched repeatability. Proceq Concrete test hammer.
www.silverschmidt.com/
6
>30
7
CONCRETE TEST HAMMER
... TEST HAMMER. Concrete testing with original SCHMIDT Hammer is the most frequently used method worldwide for non-destructive testing of concrete and.
www.abbeyspares.co.uk/pdfs/SchmidtHammerAbbey.pdf
7
>30
8
concrete test hammer Price - AliExpress.com
Concrete test hammer Price from Cheap Concrete test hammer lots, Find Concrete test hammer Price Trends at Industry & Science Price,Testing Equipment ...
www.aliexpress.com/price/concrete-test-hammer-price.html
8
>30
9
Concrete Test Hammers - Humboldt Mfg. Co.
Humboldt carries a complete selection of concrete rebound hammers, or schmidt hammers, from manual to advanced models, including the SilverSchmidt, ...
www.humboldtmfg.com/test_hammers.html
>30
2
10
Schmidt Rebound Hammer Test For…
Rebound Hammer-Schmidt Rebound Hammer Test for Concrete is the main services of Sigma. Compressive Strength of Concrete is also the primary service of Sigma.
www.reboundhammer.com/testing.html
Search results for "Concrete test hammer"
Google: approx. 1.350.000
Concrete test hammer in science
[PDF]Summary of Concrete Workability Test Methods - International ...
Aug 1, 2003 ... The University of Texas at Austin. Cockrell ... This document describes 61 test methods for measuring concrete ..... 3.1.5.2 Kango Hammer Test .
Manual Rebound Hammers | For compressive strength of hardened ...
Manual Test Hammers provide the most economical, quick and easy concrete compressive strength test in the field. It will also provide an indices of hardness ...
[PDF]RELIABILITY AND SIGNIFICANE OF SCHMIDT HAMMER ...
Schmidt Hammer (SH) test is a well-known non-destructive in-situ testing technique for evaluating uniformity and compressive strength of existing concrete ... 1 Associate Professor, Faculty of Engineering in Shoubra, Zagazig University, Cairo, ...
Testing of Hardened Concrete - Civil Engineering - University of ...
There are several reasons why testing of hardened concrete is important: (1) test .... The test measures the rebound of a hardened steel hammer impacted on the ...
Properties of concrete - Wikipedia, the free encyclopedia
Tests can be made to ensure the properties of concrete correspond to specifications ... such as a Schmidt hammer, which is used to estimate concrete strength. ... Wired.com reported on April 13, 2007 that a team from the University of Tehran, ...
Hammer Drill Comparison Test - Popular Mechanics
A corded hammer drill is a heavy-duty switch-hitter, allowing you to ram a hole into concrete or bore into wood with equal ease. It might sound like a pricey ... Mike Bullard · Southern Illinois University Carbondale. My drill quit in the middle of a ...
Rebound Hammer Test - Civil Engineering Portal
The underlying principle of the rebound hammer test is. The rebound of an elastic ... Is Schmidt hammer test a standard test for testing concrete strength? Non- destructive Testing Of ... Civil Engineering Universities/Events. Civil Engineering  ...
Non-destructive Testing Of Concrete By Rebound Hammer
Feb 20, 2013 ... Various non-destructive methods of testing concrete have been developed, which include, ... developed a test hammer for measuring the hardness of concrete by the rebound principle. ..... Civil Engineering Universities/Events.
"If concrete compression test fails, should Schmidt hammer test
Apr 5, 2013 ... "If concrete compression test fails, should Schmidt hammer test be. 0 votes. March 20th, 2013 05:09. in Civil Engineering by faylin (University of ...
Books on the term Concrete test hammer
Handbook on Nondestructive Testing of Concrete
Handbook on Nondestructive Testing of Concrete
V. M. Malhotra, Nicholas J. Carino, 2004
Gaede, K., Ball Impact Testing for Concrete (Die Kugelschlagprüfung von Beton), Bull. No. 107, Deutscher Ausschuss für Stahlbeton, Berlin, 1952, 15. 7. Schmidt, E., The Concrete test hammer (Der Beton-Prüfhammer), Schweiz. Bauz. (Zurich) ...
Significance of Tests and Properties of Concrete and ...
Significance of Tests and Properties of Concrete and ...
Paul Klieger, Joseph F. Lamond, 1994
[36] Schmidt, E., "Investigations with the New Concrete test hammer for Estimating the Quality of Concrete" (Versuche mit den neuen Beton-Prufhammer zur Qualitatsbestim- mung des Beton), Schweizer Archiv filr angerwandte Wis- senschaft ...
Concrete Portable Handbook
Concrete Portable Handbook
R. Dodge Woodson, 2011
Whether or not, you are on the job site or back in the office, this book will help you to avoid mistakes, code violations, and wasted time and money. The book’s four part treatment begins with constituent materials followed by self contained parts on Concrete Properties, Processes, and Concrete Repair and Rehabilitation. Designed to be an "all...
Concrete Technology
Concrete Technology
M L Gambhir, 2004
Loose material shall be ground off. A wide variety of Concrete test hammers is available with an operational range of M10 to M70 concretes. Each hammer designed for specific test application has different impact energy. In the most commonly ...
Testing of Concrete in Structures: Fourth Edition
Testing of Concrete in Structures: Fourth Edition
John H. Bungey, Michael G. Grantham, Stephen Millard, 2006
This fourth edition also covers the new trends in equipment and procedures, such as the continuation of general moves to automate test methods and developments in digital technology and the growing importance of performance monitoring, and ...
Development of Google searches


Blog posts on the term
Concrete test hammer
NL 4021 X / 001 Concrete Test Hammer
» NL 4021 X / 001 Concrete test hammer | PT. Jelita Citra Solusindo
www.jitrasindo.com/nl-scientific-civil-engineering/concrete-testing-equipments/nl-4021-x-001-concrete-test-hammer/
The Introduction Of The Silverschmidt Concrete Test Hammer | Android phone
Switzerland-based Proceq developed the SilverSchmidt Concrete test hammer with the intentions of improving quality of work and addressing the industry need to create a Concrete test hammer that can deliver accurate readings on virtually any concrete from any direction, on any surface without the need to compensate for impact direction. The Swiss-made SilverSchmidt is ergonomically designed and offers unprecedented benefits when measuring the compressive strength of on-site Portable Rockwell Hardness Tester concrete structures.
www.ymmzg.info/the-introduction-of-the-silverschmidt-concrete-test-hammer/
Concrete Test Hammer
]]> Concrete test hammer Concrete test hammer is an instrument which is easy to use, for quick and approximate measurement of the resistance to pressure of manufactured concrete products. The principles on which Concrete test hammer works are based on the rebound impact of a hammer on a piston which rests against the surface of the concrete products.
civil-engg-world.blogspot.com/2012/01/concrete-test-hammer.html
Cement Processing Machine In Uae | Micro On Air
cement processing plant, cement grinding machine,ball235tph plant used ball mill grinding unit maintenance and gear boxes in flender cost comparison in cement factory in bangladesh Zenith company pr
microonair.com/cement-processing-machine-in-uae/
Non-destructive Testing Of Concrete By Rebound Hammer
www.engineeringcivil.com/non-destructive-testing-of-concrete-by-rebound-hammer.html
Concrete Testing Equipment Manufacturers | LabTech Online Equipments
Concrete could be a material composed of coarse granular material (the combination or filler) embedded in a very arduous matrix of fabric (the cement or binder) that fills the house among the mixture particles and glues them along. Concrete is wide used for creating beaux arts structures, foundations, pavements, block walls, bridges, runways, highways, parking…
kamalsarma52.wordpress.com/2013/09/20/concrete-testing-equipment-manufacturers/
Concrete Hammer Test (1) Electronics Seminar Topics
Concrete Hammer Test,Ask Latest information,Abstract,Report,Presentation (pdf,doc,ppt),Concrete Hammer Test technology discussion,Concrete Hammer Test paper presentation details
seminarprojects.com/Thread-concrete-hammer-test
12