Multifaceted characteristics of acoustic emission damage and precursor indicators of instability in sandstone under cyclic impact loading. [PDF]
Sci RepHong X +8 more
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Utilization of electronic plastic waste as fine aggregate with and without silica fume in concrete: experimentation and life cycle assessment. [PDF]
Sci RepOmran S +3 more
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Application of Refill, Recoil, Rebound (3R) as a Novel Chest Compression Technique in Cardiopulmonary Resuscitation; Report of Two Cases. [PDF]
Arch Acad Emerg MedTsoungani G, Nour S.
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Analysis of Impact Hammer Rebound to Estimate Rock Drillability
Rock Mechanics and Rock Engineering, 2000 ¶In this paper, the piston rebound common to both the Schmidt Impact Hammer and down-hole hammer drills has been analyzed and calculated by means of stress wave theory and the energy conservation law. A quantitative relationship between the amount of rebound of the piston and the impact resistance index, or hardness of the rock, has been established ...
X. Li +4 more
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Evaluation of schmidt rebound hammer testing: A critical approach
Bulletin of the International Association of Engineering Geology, 1993In the present paper, a critical approach to the evaluation of Schmidt hammer testing is attempted. Through a statistical analysis of field measurements on sandstone blocks from the archaeological site of Delphi (Greece), it was shown that there is an inconsistency in the correction method proposed by the manufacturer, in relation to the direction of ...
E Kolaiti
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Testing of SFRC by the Schmidt Rebound Hammer
MRS Proceedings, 1990 AbstractThe rebound number, its relationship to fundamental frequency and correlations with compressive strength and erosion - abrasion resistance are discussed. Nine mix proportions were used. The w/c ratios were varied from 0.30 to 0.65. The volumetric percentage of hooked steel fibres was varied from 0.25 to 2.0 vol.% at the w/c of 0.30; at the ...
Jakob Šušteršič +2 more
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Factors affecting the reliability of assessing the concrete strength by rebound hammer and cores
Construction and Building Materials, 2017Abstract To assess concrete strength in a structure, nondestructive technique (NDT) like rebound hammer is combined with destructive technique (coring tests) in order to implement a relationship ‘‘conversion model” between the compressive strength and, NDT measurements.
Maitham Alwash +2 more
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Hammer rebound index as an overall-mechanical-quality indicator of self-compacting concrete containing recycled concrete aggregate [PDF]
Construction and Building Materials, 2022 The hammer rebound index has traditionally been solely and exclusively used to estimate the compressive strength of vibrated concrete. Its use has recently been extended to the prediction of the compressive strength of Self-Compacting Concrete (SCC ...
VÍCTOR Revilla-Cuesta +2 more
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Compressive strength assessment of recycled aggregate concrete using Schmidt rebound hammer and core testing [PDF]
Construction and Building Materials, 2019 peer reviewedThe main objective of this study was to estimate the compressive strength of recycled aggregate concrete (RAC) by means of Schmidt rebound hammer and core testing.
Mostafa Kazemi +2 more
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Applying Support Vector Machines in Rebound Hammer Test
Advanced Materials Research, 2013There are several nondestructive testing techniques available to test the compressive strength of the concrete and the Rebound Hammer Test is among one of the fast and economical methods. Nevertheless, it is found that the prediction results from Rebound Hammer Test are not satisfying (over 20% mean absolute percentage error).
Yu Ren Wang +4 more
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