The aim of this work is the evaluation of the fracture process zone while loading a quasi-brittle concrete compound.
The regularly used optical observation of the specimen surface does not provide accurate information regarding the fracture zone shape, particularly when this zone is tunnelled inside of the specimen body.
Further, during this period, the usage among 18- to 24-year-olds tripled, while that among 55- to 65-year-olds doubled.The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof or the Regents of the University of California. Copyright: Unless explicitly noted otherwise in the text, this manuscript has been authored by an author at Lawrence Berkeley National Laboratory under one of the following three contracts with the U. Department of Energy (or its predecessor agencies), depending on the date of the publication: The U. Government retains, and the publisher, by accepting the article for publication, acknowledges, that the U. Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for U. On-line radiographic observation of the process zone during the loading experiment serves for overall evaluation, while a tomographic measurement - which is conducted during temporal loading interruption - provides information about the spatial distribution of the newly developed cracks.Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License.
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