Print Email Facebook Twitter Experimentally validated meso-scale fracture modelling of foamed concrete Title Experimentally validated meso-scale fracture modelling of foamed concrete Author Jiang, Nengdong (Shandong University) Ge, Zhi (Shandong University) Guan, Yanhua (Shandong University) Zuo, Zhiwu (Shandong Hi-speed Group) Zhang, Hongzhi (Shandong University) Ling, Yifeng (Shandong University) Šavija, B. (TU Delft Materials and Environment) Date 2022 Abstract This work presents a study of mechanical properties of foamed concrete at the meso-scale based on a combination of X-ray computed tomography (XCT) technique and a discrete lattice type fracture model. The microstructure of the foamed concrete with different densities was obtained by XCT technique and binarized as two-phase (pore/solid) materials. The parameters (e.g., porosity, pore diameter and spacing distribution) of foamed concrete air‐void structure were characterized. The virtual specimens were subjected to computational uniaxial compression, Brazilian splitting and three-point bending test to calculate strengths and elastic modulus. The mechanical properties of solid phase were derived from the recent outcome of micromechanical models. Two types of element input parameters were used to investigate the influence of the input parameters on the simulated results. The modelling results (strength value and fracture pattern) were compared with the experiments. It shows that, without further calibration, the lattice model can predict the mechanical strength and crack pattern with good accuracy. The fracture toughness KIC was derived using three-point bending strength and the average pore diameter. The results indicate that the presence of air-void structure increases the brittleness and reduces the fracture toughness of the foamed concrete. Subject Foamed concreteMechanical propertiesDiscrete lattice modelAir‐void structure To reference this document use: http://resolver.tudelft.nl/uuid:df608e51-9401-4f64-aa17-4b5909044baf DOI https://doi.org/10.1016/j.tafmec.2022.103631 Embargo date 2023-07-01 ISSN 0167-8442 Source Theoretical and Applied Fracture Mechanics, 122 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 © 2022 Nengdong Jiang, Zhi Ge, Yanhua Guan, Zhiwu Zuo, Hongzhi Zhang, Yifeng Ling, B. Šavija Files PDF 1_s2.0_S0167844222003755_main.pdf 13.97 MB Close viewer /islandora/object/uuid:df608e51-9401-4f64-aa17-4b5909044baf/datastream/OBJ/view