Issue 46

J. Liu et alii, Frattura ed Integrità Strutturale, 46 (2018) 352-360; DOI: 10.3221/IGF-ESIS.46.32 352 Experimental study on concrete damage location by Computerized tomography technology Jinghong Liu School of Civil Engineering, Tianjin University, Tianjin 300350, China; Hebei Construction group Co., Ltd, Baoding 071051, China; College of Urban and Rural Construction, Agricultural University of Hebei, Baoding 071001, China liujinghongfree@sina.com (Corresponding author) Jian Xie School of Civil Engineering, Tianjin University, Tianjin 300350, China Yongjian Liu Hebei Construction group Co., Ltd, Baoding 071051, China Panfei Shi Anyang Architectural Design & Research Institute, Anyang 455000, China A BSTRACT . In order to solve the technical problem of damage localization in the concrete damage process, the Computerized Tomography (CT) scanning damage localization test was carried out under uniaxial compression. In addition to the three-dimensional meso model, the porosity variation law of concrete pore or cracks at different loading stages are obtained. A damage variable is created based on CT images. The results show that the change of porosity, pore volume and damage variable is consistent with the loading process. The rapid increase of concrete pore volume and damage variable can be the precursor of concrete damage. The whole process of the development and evolution of concrete cracks was observed and analyzed comprehensively by using the three-dimensional reconstruction images. A method for prognosist the evolution and localization of cracks in concrete by comprehensively analyze the CT reconstruction images, rapid increase of concrete pore volume and rapid growth of damage variable is presented. K EYWORDS . Concrete; Three-Dimensional Meso Model; CT Test, Damage Location. Citation: Liu, J., Xie, J., Liu, Y., Shi, P., Experimental study on concrete damage location by Computerized tomography and Acoustic Emission technology, Frattura ed Integrità Strutturale, 46 (2018) 352-360 Received: 03.08.2018 Accepted: 12.09.2018 Published: 01.10.2018 Copyright: © 2018 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.