Print Email Facebook Twitter Towards understanding stochastic fracture performance of cement paste at micro length scale based on numerical simulation Title Towards understanding stochastic fracture performance of cement paste at micro length scale based on numerical simulation Author Zhang, H. (TU Delft Materials and Environment) Šavija, B. (TU Delft Materials and Environment) Schlangen, E. (TU Delft Materials and Environment) Date 2018-09-20 Abstract This work presents a study of stochastic fracture properties of cement paste at the micro length scale based on a combination of X-ray computed tomography (XCT) technique and discrete lattice type fracture model. Thirty virtual specimens consisting of pore, outer hydration products, inner hydration products and anhydrous cement particles were extracted from 3D images obtained through XCT from real cement paste samples. These virtual specimens were subjected to a computational uniaxial tension test to calculate their tensile strengths and elastic moduli. The predicted stochastic strengths were analysed using Weibull statistics, showing that specimens with lower w/c ratio yield higher strength and less variability. The strength-porosity and modulus-porosity relations were investigated based on existing empirical models. It was shown that existing models can predict the properties in the studied porosity range quite accurately, with the exponential model having the highest determination coefficient among all the models for both relations. Finally, by comparing the existing data in the literate, it is found that the smaller cement paste specimens have higher modulus/tensile strength ratio, which indicates that they are able to have more strain at the peak load. Subject Cement pasteLattice modellingMicromechanicsX-ray computed tomography To reference this document use: http://resolver.tudelft.nl/uuid:c5c63401-eed7-4680-8700-7347ab4dd96b DOI https://doi.org/10.1016/j.conbuildmat.2018.06.167 Embargo date 2019-01-07 ISSN 0950-0618 Source Construction and Building Materials, 183, 189-201 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 © 2018 H. Zhang, B. Šavija, E. Schlangen Files PDF 1_s2.0_S0950061818315642_main.pdf 5.01 MB Close viewer /islandora/object/uuid:c5c63401-eed7-4680-8700-7347ab4dd96b/datastream/OBJ/view