It is necessary that the rebound hammer is checked against the testing anvil before commencement of a test to ensure reliable results. Nureg 1556, consolidated guidance for material licenses. Scribd is the worlds largest social reading and publishing site. This european standard does not apply to small glass parts which form an integral part of equipment such as sight glasses. Schmidt hammer test or rebound hammer test of concrete. 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.
The above laboratory can be set up at any construction site in a small covered area of about 16 sq. The fixed load required is of the order of 7 nmm8 when the impact energy of the hammer is about 2. 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. Concrete piles i ltd calcutta steel authority of india ltd ranchi tata g. Ultrasonic pulse velocity method civil engineering. Ultrasonic pulse velocity by bureau of indian standards publication date 1992 name of standards organization. The best part of this post is you can view and download the all civil engineering iscode books in pdf. When the plunger of the rebound test hammer is pressed against the surface of the concrete the. The load should be increased for calibrating rebound hammers of greater impact energy and decreas. Rebound hammer test on concrete principle, procedure.
Is codes is 11 non destructive testing is 311 part 1. Changes in the structure of the concrete which may occur with time, 4. It consists of a spring controlled mass that slides on a plunger within a tubular housing. Health assessment of reinforced concrete structures a case. Method of nondestructive testing of concret, part 1. Assessment of characteristic compressive strength in concrete. The rebound of an elastic mass depends on the hardness of the surface against which its mass strikes. 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. The fineness modulus, specific gravity and bulk modulus of fine and coarse aggregate were 2. Is 311 part 1 1992, nondestructive testing method of test, part 1 ultrasonic pulse velocity, bis, new delhi. In the other case, it required such studies in specific situations. Portable ultrasound non destructive digital indicator tester is 311 part 1. Method of nondestructive testing of concrete, part 1.
Method of nondestructive testing of concretmethods of. The testing procedure for hardened concrete using rh is prompt and easy. Non destructive concrete testing aaryan engineers, mumbai. Pdf download is code books for civil engineering all at. Rebound hammer tests shall be carried out in accor dance with i. This test is done to assess the quality of concrete by ultrasonic pulse velocity method as per is. In one case, it offered marketplace incentives for the completion of pediatric drug studies. 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. Method of nondestructive testing of concretemethods of test, part 2.
Opc 43 grade, meeting the specification as per is 8112. Part a road works 159 appendix iv forms for testing. 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. 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. Nondestructive testing of concrete methods of test. Assessment of characteristic compressive strength in.
Pdf non destructive testing of bridge pier a case study. 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. Non destructive testing in concrete linkedin slideshare. One of the test used to find out the compressive strength of concrete. July 1992 method 11 toxicity characteristic leaching procedure 1.
Use the search bar on the table to find the specific is codebook as per your requirement. 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. Cement and concrete ced 2 designator of legally binding document. In order to search the specific is book enter the code number ex. Before knowing the procedure learn how schidmt hammer. Effect of graphene oxide on mechanical and durability. It is portable, easytouse, lowcost, and can quickly cover large areas but it is valuable. 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. An ultrasonic pulse velocity upv test is an insitu, nondestructive test to check the quality of concrete and natural rocks. The presence of cracks,voids and other imperfections, 3. Method of nondestructive testing of concretmethods of test, part 2.
Method of nondestructive testing of concret methods of test, part 2. 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. Method of non destructive testing of concretmethods of test, part 2. Comparatively higher velocity is obtained when concrete.
Concrete rebound hammer test was first covered by is 311 part 2 1992. Rebound hammer test 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. Rebound hammer test is a nondestructive testing method of concrete which provide a convenient and rapid indication of the compressive strength of the concrete. This european standard should be used in conjunction with other relevant standards when substantial parts of glass or from other brittle materials are present. The standards followed for carrying out the ndt test using rh is as per is 3112 1992. 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. Is 311 part 2 1992, nondestructive testing method of test, part 2. 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.
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 assessment of compressive strength of concrete. 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. The rebound of an elastic mass depends on the hardness of. Pdf combined use of nondestructive tests for assessment of. Method of non destructive testing of concret, part 1.
1278 384 278 918 1375 485 1365 737 194 1450 1308 109 350 989 364 881 410 851 120 992 628 795 1542 494 254 55 584 1049 697 17 925 86 380 761 368 178 1225 346