Standard test method for rebound number of hardened. Equotip piccolo 2 test equipment pdf manual download. This laboratory manual of nondestructive testing for concrete structure will be used in senior level. Isrm suggested method utr0562 rock classification hammer together with utr0565 nw rock cradle is an easytouse apparatus for measuring the rebound index on rock cores and samples. Betonprufhammer bedienungsanleitung sclerometre a beton nnr. Besides, the test is relative simple, economical and versatile compared to. The suppliermanufacturer of the rebound hammer should indicate. Digital functions allow greater number of test, leading to better quality tests. Ht225a portable concrete test hammer the ht 225a is comparable with the schmidt hammer, type n conforms to iso.
Astm c805 c805m 18 standard test method for rebound. Types of rebound hammers several hundred thousands of schmidt rebound hammers are in uses worldwide baumann, 2006. Jul 08, 20 rebound hammer test schmidt s hammer a non destructive test on concrete surface hardness test duration. It is designed for testing concrete within a compressive strength range of 1,450 to 10,152 psi 10 to 70 nmm 2 and impact energy of the test is 1. Astmc805 standard test method for rebound number of. Astm d5873 14 standard test method for determination of. It is designed for testing concrete 4 100mm or more in thickness with a maximum particle size less than or equal to 1. Regional setting the profoscope supports four regional settings. An astm designation number identifies a unique version of an astm standard. In 1954 proceq sa was founded and has been producing the original schmidt rebound hammers since then, without any. Concrete test hammer type nr schmidt concrete impact. Nondestructive testing of concrete methods of test. This concrete test hammer, entirely produced by matest, has aluminium frame and thanks to its very accurate manufacture processing and selected components ensures high precision test.
The hardness testing method of shore 1911 was adopted in the device developed by schmidt, and the measure of surface hardness is the rebound index rather than ball penetration. Utc3045 silver schmidt test hammer proceq is the worlds most advanced rebound hammer fully adapted specifically to the extremely varied concrete testing applications testing on cores and blocks. Structure inspection manual part 5 nde and pde testing chapter 18 rebound hammer. The hammer measures the rebound of a springloaded mass impacting.
Always hold the concrete rebound hammer in both hands while in use. This digital concrete test hammer, microprocessor operated, entirely designed and manufactured by matest with advanced technology, performs basic concrete testing with continuous automatic recording of all parameters in accordance with en 125042 specifications, register and process data and then transfer them to a pc the unit consists of the standard mechanical model c380, but equipped with. Standard test method for rebound number of hardened concrete. Manual of concrete practicepart 2, 2000, american concrete institute, 38800 3 annual book of astm standards, vol 03. The rebound hammer is also called as schmidt hammer that consist of a spring controlled mass that slides on a plunger within a tubular housing. Schmidt hammer test or rebound hammer test of concrete. The rebound values r of the sample cubes were measured using the concrete test hammer. Rebound hammer test is a nondestructive testing method of concrete which provide a convenient and rapid indication of the compressive strength of the concrete. China schmidt hammer manufacturers select 2020 high quality schmidt hammer products in best price from certified chinese strength testing manufacturers, test instrument suppliers, wholesalers and factory on. Aug 05, 2018 the operation of schmidt hammer is depicted in the following diagram and you can also refer the above figure 1 for clear understanding. C386m digital concrete test hammer with microprocessor. Non destructive testing laboratory manual imam abdulrahman.
This fop is based on astm c 805 and has been modified per wsdot standards. Pdf standard test method for rebound number of hardened. Anyone who is not familiar with the operating instructions must be. With this development the hardness measurement became. Hm75 original schmidt concrete test hammer is the classic rebound hammer known for its accuracy, repeatability, and longevity. Then the compressive strength was ascertained on a pressure testing machine. Digital and manual schmidt concrete test hammers for quick and easy determination of concrete compressive strength. C805 c805m18 standard test method for rebound number of hardened concrete rebound number insulating boards springdriven steel hammers. Suitable for finished concrete structures and buildings having strength resistances from 10 to 70 nsq. Figure 3 from figure 3, the first image of the rebound hammer is set the right angle to the concrete surface and in the second hammer is pushed to the concrete surface at defined energy. It is only a test used for estimating the strength of concrete in structure and it can hardly be considered as a substitute for compressive strength test. Pdf application of rebound hammer method for estimating.
It is the responsibility of the user of this standard to establish appropriate. Test procedure the reading is very sensitive due to local variation in the concrete, especially to aggregate. The rebound hammer has been around since the late 1940s and today is a. En 125042, env 206 astm c805, astm d5873 rock, bs 1881, part 202. In each test, at least 10 test hammer impacts were performed on one. The silverschmidt is an integrated electronic schmidt. Jun 10, 2016 the hm75 schmidt concrete rebound test hammer provides rapid nondestructive estimates of inplace concrete strength and is a valuable tool when assessing the need for further testing. Review of the rebound hammer method estimating concrete. A schmidt hammer, also known as a swiss hammer or a rebound hammer or concrete hammer test, is a device to measure the elastic properties or strength of concrete or rock, mainly surface hardness and penetration resistance. Perform a few test impacts with the concrete test hammer on this smooth, hard sur face before taking any measurements which you are going to evaluate.
Rebound hammer determination of compressive strength of. To view the redline modifications, contact the wsdot quality systems manager at 3607095412. Rebound hammer test schmidts hammer a non destructive test on concrete surface hardness test duration. The userinterface of the silverschmidt is based on a straightforward menu structure. Part 202, isoidis8045, env 206, igjt 232001 the original schmidt hammer, type n, is designed for nondestructive testing of concrete items 4 100mm or more in thickness, or concrete with a maximum particle size less than or equal to 1. Betonprufhammer bedienungsanleitung sclerometre a beton n. View and download proceq equotip piccolo 2 operating instructions manual online. Original schmidt rebound hammer manual proceq make portable and flexible, simple and convenient to use, impact energy.
Active standard astm c805 c805m developed by subcommittee. It is necessary that the rebound hammer is checked against the testing anvil before commencement of a test to ensure reliable results. Is there a formula to find the compression strength of. In the example, the regional setting in this case is astm c805. Portable metal hardness tester piccolink software only for piccolo 2. Proceqs schmidt hammer portfolio is the most comprehensive available. The original schmidt is the classic for the basic testing for concrete and. The manual concrete test hammer, aka rebound hammer, schmidt hammer, swiss hammer, sclerometer, is the most widely used non destructive instrument for compressive strength determination. This question is taken from book named a self learning manual mastering different fields of civil. Schmidt os120pt the concrete test hammers are the most widely used portable ndt measuring instruments for a rapid assessment of the condition of a concrete structure. A huge difference was obtained by rebound hammer and core samples, i think that the segregation of coarse aggregate is the one to blame since of the core has almost no coarse aggregate. Humboldts concrete rebound hammer provides a reliable, yet economical, alternative to the original schmidt hammer. Original schmidt rebound hammer manual proceq make. Digital rebound hammers for the quick and easy determination of the strength of concrete, and hardness of construction materials.
It was invented by ernst schmidt, a swiss engineer. An instrument guide is provided to center the rebound hammer over impact area and keep the instrument perpendicular to the surface. To use this test method to estimate strength, it is necessary to establish a relationship between strength and rebound number for a given concrete and given apparatus see note 1. Metric cover and bar diameters in mm according to table in 6. Wisdot structures inspection manual part 5 chapter 18. All about structural analysis and design 31,266 views 6. The concrete test hammer is a mechanical device used for performing. This setting affects all other displays and should be done prior to making other selections.
Utc3045 silver schmidt concrete test hammer pc n type proceq. It provides a rapid, nondestructive method of quickly assessing the condition of concrete structures. Cgoldenwall concrete rebound hammer tester resiliometer. Developed in 1948 by a swiss engineer named ernst schmidt, the device measures the hardness of concrete surfaces. Standards vary in their precise requirements, according to astm c805. Compliance with industry standards data collection and processing of test results comply with major industry standards. Type l schmidt test hammer the type l hammer operates with significant lower impact energy, making this hammer the ideal option for testing thin walled items with a thickness between 2 and 4 50 to 100 mm or for testing small components. Is schmidt hammer test a standard test for testing concrete.
China schmidt hammer, schmidt hammer manufacturers, suppliers. Schmidt and introduced by proceq at the beginning of the 1950s. The operation of schmidt hammer is depicted in the following diagram and you can also refer the above figure 1 for clear understanding. A logbook feature summarises all activity, records gps locations and lets you add notes, images and audio comments. Schmidt hammer rebound tests were carried out directly on the faces of the lower and upper coal beds at both the a05 and f02 panels by using a calibrated ltype hammer fig. The fhwa guide also states that troweled surfaces result in a higher scatter. Concrete rebound hammer tester resiliometer schmidt hammer zc3a with english label advantage and feature the concrete rebound hammer is in accordance with technical regulation of jgjt232001, used for testing of concrete compressive strength within the scope of 1060mpa, with the system s tandard energy of 2. Proceq equotip piccolo 2 operating instructions manual pdf. E 177 practice for use of the terms precision and bias in astm test methods2 3. The top quality test hammer available on the market. Rebound hammer schmidt hammer latest price, manufacturers. You can always contact our buyer service for a recommended list of meters and instruments manufacturers tailored. Schmidt and introduced by proceq at the beginning of.
However, it typically has the largest coefficient of variation. Objective determine compressive strength of concrete by using rebound schmidt hammer. Is schmidt hammer test a standard test for testing. The concrete test hammers are the most widely used portable ndt measuring instruments for a rapid assessment of the condition of a concrete structure.
Testing the compressive strength of a concrete cube using schmidt hammer. Proper use of the rebound hammer updated to reflect the. These applications include, for examples, the prediction of penetration rates for tunnel boring machines, determination of rock quality for construction purposes, grouping of test specimens, and prediction of hydraulic erodibility of rock. The rebound hammer strength test, being a nondestructive test, has its advantages of preserving integrity of sample. Silver schmidt concrete test hammer nondestructive.
The hm75 schmidt concrete rebound test hammer provides rapid nondestructive estimates of inplace concrete strength and is a valuable tool when assessing the need for further testing. Hammer verification management tools help you keep your hammer calibrated. Rebound hammers at 18 c 0 f may exhibit rebound numbers e 18. The rebound hammer has been around since the late 1940s and today is a commonly used method for estimating the compressive strength of inplace concrete. Standard test method for determination of rock hardness by. Pdf rebound hammer test method statement rusi sumdaram. An instrument guide is provided to center the rebound hammer over the impact area and keep the instrument perpendicular to the surface. The testing anvil should be of steel having brinell hardness of about 5000 nmm.
Schmidt hammer, type n supports the following standards. China schmidt hammer, schmidt hammer manufacturers. Testing instruments pdf, 640 kb sales flyer schmidt hammers pdf, 314 kb. Schmidt hammer is in not a standard test for acceptance testing of concrete strength. In switzerland ernst schmidt developed a spring impact hammer of which handling was found to be superior to the ball penetration tester devices schmidt, 1950.
China concrete rebound hammer, concrete rebound hammer. Schmidt hammers lend themselves to grading rock core in the lab and testing rocks in the field. A rebound hammer, commonly referred to as a schmidt hammer, is a mechanical device used todirectly measure thehardness of in place concrete and the calibrated compressive. Impact results can be heard live in audio on apple ios devices via texttospeech. The rebound hammer test is the most popular method to measure the surface hardness of a. This page lists manufacturers of quality concrete rebound hammer, find out more by clicking schmidt hammer, concrete test hammer, rebound hammer with competitive price.
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