Title
High speed photography technique for measuring impact strength of porous concrete
Author
Agar Ozbek, A.S.
Weerheijm, J.
van Breugel, K.
Publication year
2018
Abstract
In this study, an impact strength measurement method based on high speed photography, that has been developed for testing porous concrete, was introduced. In the experiments, a drop weight impact test set-up instrumented with a high speed camera was used. The impact strength analyses were conducted using impedance mismatch method, where the wave reverberations were investigated in detail. The measurement configuration carries the advantage of being a fast, non-contact and accurate experimental method where only the known material properties and particle velocity data of the drop weight are required. The target cementitious material itself is not actually involved in the measurements or the subsequent analyses. The method also facilitates the observation of the crack patterns throughout the experiment. The measurement method was verified to be accurate and consistent by testing different types of porous concretes and by comparing the results with those from other dynamic monitoring techniques, such as laser Doppler velocimetry and direct stress gauge measurements.
Subject
Drop weight
High speed photography
Impact
Impedance mismatch
Porous concrete
Concretes
Doppler effect
Drops
High speed cameras
Impact strength
Impedance matching (electric)
Velocity control
Drop weight
Dynamic monitoring techniques
High-speed photography technique
Impact
Impedance mismatch
Impedance mismatch methods
Laser Doppler Velocimetry
Porous concretes
High speed photography
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http://resolver.tudelft.nl/uuid:15550ba3-3d1f-4f02-8b8d-e4a93345be8d
DOI
https://doi.org/10.1016/j.conbuildmat.2018.08.031
TNO identifier
954958
Publisher
Elsevier Ltd
ISSN
0950-0618
Source
Construction and Building Materials, 186 (186), 1092-1104
Document type
article