The study of micro cracks in concrete is very important to understand its behavior under loading and to improve this material. The direct observation in a scanning microscope is not a suitable method because the concrete is subject to drying shrinkage. Another indirect and non destructive method of observation by SEM is proposed. With this method using a single replica the micro cracks of concrete can be observed better than 0.5 µm. ....etc

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please arrange a ppt on NDT... its very necessary 4 my seminar.. ....etc

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sibin ....etc

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Concrete is an indispensable construction material of modern age. The properties of concrete are greatly dependant on the constituents, workmanship, water-cement ratio, compaction, curing etc. Direct assessment of the strength of concrete is not possible because direct tests induces destructive stresses and causes failure of the structure. So the concrete strength is tested using standard specimens made with the same mix as that of the structure. But the test specimens can vary from the actual structure in properties due to difference in compac ....etc

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INTRODUCTION
The successful operation of structures / components during their entire life requires the implementation of a dedicated programme for condition assessment through in-service inspection (ISI) of all critical components of the plants / structures. The condition assessment through ISI and life prediction approaches enable uninterrupted operation, avoidance of unplanned shutdowns and taking decision on repair, up-gradation, modernization and replacement of necessary components for extension ....etc

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Concrete is an indispensable construction material of modern age. The properties of concrete are greatly dependant on the constituents, workmanship, water-cement ratio, compaction, curing etc. Direct assessment of the strength of concrete is not possible because direct tests induces destructive stresses and causes failure of the structure. So the concrete strength is tested using standard specimens made with the same mix as that of the structure. But the test specimens can vary from the actual structure in properties due to difference in compac ....etc

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NDT TESTS ON CONCRETE

Rebound Tests
The rebound hammer is a surface hardness tester for which an empirical
correlation has been established between strength and rebound number.
The only known instrument to make use of the rebound principle for
concrete testing is the Schmidt hammer, which weighs about 4 lb (1.8 kg)
and is suitable for both laboratory and field work. It consists of a springcontrolled
hammer mass that slides on a plunger within a tubular housing.
The hammer is forced against the surface of the concrete by ....etc

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ABSTRACT
Condition monitoring of components and plants are of great importance for safe and reliable operation and for increasing productivity of plants. The challenges towards the condition monitoring can be successfully met by employing non-destructive evaluation (NDE) techniques. Vibration monitoring techniques are applied for periodic / continuous assessment of machinery parts and plants. Acoustic emission technique is used for leak detection and for structural integrity monitoring applications. Inf ....etc

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Abstract
Destructive and non-destructive methods have been used for the determination of micro-traces of antimony in high-purity silicon powder. The destructive method was based on sub-stoichiometric radio-activation analysis with solvent extraction using BPHA and cupferron as organic reagents. The antimony contents in high-purity silicon can be determined by the proposed method.
A new non-destructive method was developed for the detection of refrigerant leakage at an evaporator's inflow. Nitrogen and oxygen gas were suc ....etc

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Seminar reports On non destructive testing of concrete structures ....etc

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