caa a22 4500 606172734 CHVBK 20210128100729.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s10921-014-0267-3 doi (NATIONALLICENCE)springer-10.1007/s10921-014-0267-3 Review of Ultrasonic Wave Reflection Applied to Early-Age Concrete and Cementitious Materials [Elektronische Daten] [John Popovics, Kolluru Subramaniam] The ultrasonic wave reflection method, as applied to characterize early age cement-based materials, is reviewed. The topic is first introduced with a historical review of method development. The theoretical basis of the reflection technique within the context of wave mechanics is then considered, followed by a description of experimental techniques and associated requirements of testing setups. Then fundamental background information about the method is described, including effects of ultrasonic wave mode (compression and shear waves) and buffer material (metal, ceramic and polymer) on the results and required experimental apparatus. Several test application tasks, across a range of cementitious material ages (hydration states), are summarized, including determination of global constitutive properties, estimation of setting time (initial and final sets), evolution of strength, and assessment of microstructure (e.g. flocculation state in setting material and porosity in solid material). The analyses of various techniques are presented in a unified manner for elastic, viscoelastic and poroelastic idealizations of the cementitious material. Springer Science+Business Media New York, 2014 Cement paste nationallicence Concrete nationallicence Non-destructive testing nationallicence Material microstructure nationallicence Reflection nationallicence Setting nationallicence Strength development nationallicence Ultrasonic wave nationallicence Popovics John Department of Civil and Environmental Engineering, The University of Illinois, Urbana, IL, USA aut Subramaniam Kolluru Department of Civil Engineering, Indian Institute of Technology Hyderabad, Hyderabad, AP, India aut Journal of Nondestructive Evaluation Springer US; http://www.springer-ny.com 34/1(2015-03-01), 1-12 0195-9298 34:1<1 2015 34 10921 https://doi.org/10.1007/s10921-014-0267-3 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10921-014-0267-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Popovics John Department of Civil and Environmental Engineering, The University of Illinois, Urbana, IL, USA aut NATIONALLICENCE 700 1- Subramaniam Kolluru Department of Civil Engineering, Indian Institute of Technology Hyderabad, Hyderabad, AP, India aut NATIONALLICENCE 773 0- Journal of Nondestructive Evaluation Springer US; http://www.springer-ny.com 34/1(2015-03-01), 1-12 0195-9298 34:1<1 2015 34 10921