Pdf combined use of nondestructive tests for assessment. Is 311 part 2 1992, nondestructive testing method of test, part 2. It is portable, easytouse, lowcost, and can quickly cover large areas but it is valuable. Method of nondestructive testing of concret methods of test, part 2. Swiss engineer ernst schmidt is the name of the scientist who first introduced rebound hammer test, and it is also called as schmidt hammer test or swiss hammer test. In the other case, it required such studies in specific situations. This european standard should be used in conjunction with other relevant standards when substantial parts of glass or from other brittle materials are present. Rebound hammer test is done to find out the compressive strength of concrete by using rebound hammer as per is. Insitu ndt investigation to estimate degraded quality of. Changes in the structure of the concrete which may occur with time, 4. Ultrasonic pulse velocity method civil engineering. The presence of cracks,voids and other imperfections, 3.
Nondestructive testing of concretemethodsoftest part 2 rebound hammer rebound is read off along a graduated scale and is designated as the rebound number or rebound index. Rebound hammer tests shall be carried out in accor dance with i. Cement and concrete ced 2 designator of legally binding document. Use the search bar on the table to find the specific is codebook as per your requirement. The load should be increased for calibrating rebound hammers of greater impact energy and decreas. A s per the gu idelines laid in is311part 1 1992, since the usp velocity is greater than 3 kmsec, the concrete quality may be categor ised 572 d. Pdf combined use of nondestructive tests for assessment of. Pdf assessment of compressive strength of concrete. In one case, it offered marketplace incentives for the completion of pediatric drug studies. The fixed load required is of the order of 7 nmm8 when the impact energy of the hammer is about 2.
Method of nondestructive testing of concrete, part 1. Nondestructive testing of concrete methods of test. The rebound of an elastic mass depends on the hardness of the surface against which its mass strikes. In this test, the strength and quality of concrete or rock is assessed by measuring the velocity of an ultrasonic pulse passing through a concrete structure or natural rock formation this test is conducted by passing a pulse of ultrasonic through concrete to be. Schmidt hammer test or rebound hammer test of concrete.
While conducting the test, the factors affecting rebound number and its correlation with strength have been taken into consideration such as effect of gravity, smoothness of test. July 1992 method 11 toxicity characteristic leaching procedure 1. The best part of this post is you can view and download the all civil engineering iscode books in pdf. Pdf non destructive testing of bridge pier a case study. The fineness modulus, specific gravity and bulk modulus of fine and coarse aggregate were 2. Method of nondestructive testing of concret, part 1. The underlying principle of the rebound hammer test is. Is 311 part 1 1992, nondestructive testing method of test, part 1 ultrasonic pulse velocity, bis, new delhi. I n the late 1990s, the federal government enacted policies to expand the study of drugs in children and thereby to begin to correct a serious deficit in the data on drug safety and efficacy for young patients. Part a road works 159 appendix iv forms for testing. Method of nondestructive testing of concretemethods of test, part 2. Assessment of characteristic compressive strength in concrete. Schmidt hammer rebound hammer test is done to find out the compressive strength of concrete by using rebound hammer as per is.
Testing services rebound hammer rebound hammer test is done to find out the compressive strength of concrete by using rebound hammer as per is. Comparatively higher velocity is obtained when concrete. Rebound hammer see other formats disclosure to promote the right to information whereas the parliament of india has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote. Portable ultrasound non destructive digital indicator tester is 311 part 1. Concrete rebound hammer test was first covered by is 311 part 2 1992. Method of nondestructive testing of concretmethods of test, part 2. Method of non destructive testing of concretmethods of test, part 2. Method of non destructive testing of concret, part 1. It consists of a spring controlled mass that slides on a plunger within a tubular housing.
Non destructive testing in concrete linkedin slideshare. Legally binding document step out from the old to the newjawaharlal nehru. Scribd is the worlds largest social reading and publishing site. The standards followed for carrying out the ndt test using rh is as per is 3112 1992. 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. An ultrasonic pulse velocity upv test is an insitu, nondestructive test to check the quality of concrete and natural rocks. In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to. Ultrasonic pulse velocity by bureau of indian standards publication date 1992 name of standards organization. Nureg 1556, consolidated guidance for material licenses. Rebound hammer test on concrete principle, procedure.
Non destructive concrete testing aaryan engineers, mumbai. Rebound hammer test is a nondestructive testing method of concrete which provide a convenient and rapid indication of the compressive strength of the concrete. The testing procedure for hardened concrete using rh is prompt and easy. When the plunger of the rebound test hammer is pressed against the surface of the concrete the. Before knowing the procedure learn how schidmt hammer. As per is 311 part 1 1992, which covers the ultrasonic pulse velocity method of test for non destructive testing of concrete the transducers may be piezoelectric or magnetostrictive type and the natural frequency for different path lengths is as shown below path length mm upto 500 500 700 700 1500 above 1500 3. Concrete piles i ltd calcutta steel authority of india ltd ranchi tata g. Assessment of characteristic compressive strength in. The underlying principle of this test is the method consists of measuring the time of travel of an ultrasonic pulse passing through the concrete being tested. This test is done to assess the quality of concrete by ultrasonic pulse velocity method as per is. The rebound of an elastic mass depends on the hardness of.
It shall be capable of measuring the time inter val elapsing between the onset of a pulse gene rated at the transmitting transducer and the onset of its arrival at the receiving transducer. Health assessment of reinforced concrete structures a case. Rebound hammer test rebound hammer test is done to find out the compressive strength of concrete by using rebound hammer as per is. Opc 43 grade, meeting the specification as per is 8112. One of the test used to find out the compressive strength of concrete. Method of nondestructive testing of concretmethods of. Pdf download is code books for civil engineering all at. The above laboratory can be set up at any construction site in a small covered area of about 16 sq. The most satisfactory way of establishing a correlation between compressive strength of concrete and its rebound number is to measure both the properties simultaneously on concrete cubes. It is necessary that the rebound hammer is checked against the testing anvil before commencement of a test to ensure reliable results. This european standard does not apply to small glass parts which form an integral part of equipment such as sight glasses. Effect of graphene oxide on mechanical and durability.