Question
Download Solution PDFIn ultrasonic pulse velocity method, if the result of some concrete is 3.2 km/s, then quality of concrete is
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
ULTRASONIC PULSE VELOCITY METER
- The method consists of measuring the time of travel of an ultrasonic pulse passing through the concrete being tested.
- Comparatively higher velocity is obtained when concrete quality is good in terms of density, uniformity, homogeneity etc.
(i) the homogeneity of the concrete,
(ii) the presence of cracks, voids, and other imperfections,
(iii) changes in the structure of the concrete which may occur with time,
(iv) the quality of the concrete in relation to standard requirements,
(v) the quality of one element of concrete in relation to another, and the values of the dynamic elastic modulus of the concrete.
Interpretation of Results
- The quality of concrete in terms of uniformity, incidence or absence of internal flaws, cracks and segregation, etc indicative of the level of workmanship employed, can thus be assessed using the guidelines given below, which have been evolved for characterizing the quality of concrete in structures in terms of the ultrasonic pulse velocity.
| Pulse Velocity (km/sec) | Concrete quality (grading) |
| > 4.5 | Excellent |
| 3.5 - 4.5 | Good |
| 3 - 3.5 | Medium |
| < 3 | Doubtful |
Last updated on Jul 1, 2025
-> JKSSB Junior Engineer recruitment exam date 2025 for Civil and Electrical Engineering has been rescheduled on its official website.
-> JKSSB JE exam will be conducted on 31st August (Civil), and on 24th August 2025 (Electrical).
-> JKSSB JE application form correction facility has been started. Candidates can make corrections in the JKSSB recruitment 2025 form from June 23 to 27.
-> JKSSB JE recruitment 2025 notification has been released for Civil Engineering.
-> A total of 508 vacancies has been announced for JKSSB JE Civil Engineering recruitment 2025.
-> JKSSB JE Online Application form will be activated from 18th May 2025 to 16th June 2025
-> Candidates who are preparing for the exam can access the JKSSB JE syllabus PDF from official website of JKSSB.
-> The candidates can check the JKSSB JE Previous Year Papers to understand the difficulty level of the exam.
-> Candidates also attempt the JKSSB JE Mock Test which gives you an experience of the actual exam.