Print Email Facebook Twitter Investigation of drying-induced non-uniform deformation, stress, and micro-crack propagation in concrete Title Investigation of drying-induced non-uniform deformation, stress, and micro-crack propagation in concrete Author Gao, Peng (South China University of Technology) Chen, Yang (South China University of Technology; Guangdong Provincial Academy of Building Research Group Co., Ltd.) Huang, Haoliang (South China University of Technology; Guangdong Low Carbon Technologies Engineering Center for Building Materials) Qian, Zhiwei (FEMRIS) Schlangen, E. (TU Delft Materials and Environment) Wei, Jiangxiong (South China University of Technology; Guangdong Low Carbon Technologies Engineering Center for Building Materials) Yu, Qijun (South China University of Technology; Guangdong Low Carbon Technologies Engineering Center for Building Materials) Date 2020 Abstract Concrete generally deforms and cracks in a non-uniform manner under drying-induced stress. This study used the lattice fracture model to simulate the drying-induced non-uniform deformations, stresses, and micro-crack propagation in concrete. Experiments were designed to validate the lattice fracture model, wherein the drying-induced non-uniform deformations and micro-crack patterns in concrete were measured using a digital image correlation technique and a fluorescent epoxy impregnation method, respectively. It was found that the simulated non-uniform deformations and micro-crack patterns were close to the experimental observations. The interaction mechanism between drying-induced non-uniform stresses and micro-cracks was analysed based on the validated lattice fracture model. The micro-cracks were found to cause stress concentration both in coarse aggregate and the mortar that covered coarse aggregate, which could lead to high micro-cracking risk as drying continues. Subject Digital image correlationDrying shrinkageMicro-cracksNon-uniform deformationStress To reference this document use: http://resolver.tudelft.nl/uuid:498b9a66-3fcd-40bc-bac3-3102c38ae5a2 DOI https://doi.org/10.1016/j.cemconcomp.2020.103786 Embargo date 2021-02-22 ISSN 0958-9465 Source Cement and Concrete Composites, 114, 1-14 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2020 Peng Gao, Yang Chen, Haoliang Huang, Zhiwei Qian, E. Schlangen, Jiangxiong Wei, Qijun Yu Files PDF 1_s2.0_S0958946520302924_main.pdf 22.52 MB Close viewer /islandora/object/uuid:498b9a66-3fcd-40bc-bac3-3102c38ae5a2/datastream/OBJ/view