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Non-destructive testing for in-place strength estimation of concrete masonry units

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The production factories of concrete masonry units (CMUs) mostly rely on destructive testing as per ASTM C140 for quality assurance. Such testing is expensive and is, therefore, performed on a limited basis. This research investigates the prospects of using non-destructive tests with the rebound hammer and ultrasonic pulse velocity for evaluating the compressive strength of concrete specimens made with materials, mixture proportions and compaction representative of CMUs. A statistical analysis of the testing data shows that these non-destructive testing techniques are not equally reliable. It is concluded that pulse velocity can be a useful tool for the in-situ strength evaluation of CMUs.
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Keywords: CONCRETE MASONRY UNITS; QUALITY CONTROL; REBOUND HAMMER; STRENGTH ESTIMATION; ULTRASONIC PULSE VELOCITY

Document Type: Research Article

Publication date: March 1, 2016

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