A1 Journal article (refereed)
Quasi-brittle porous material : simulated effect of stochastic air void structure on compressive strength (2021)


Erkkilä, A.-L., Leppänen, T., Virkajärvi, J., Parkkonen, J., Turunen, L., & Tuovinen, T. (2021). Quasi-brittle porous material : simulated effect of stochastic air void structure on compressive strength. Cement and Concrete Research, 139, Article 106255. https://doi.org/10.1016/j.cemconres.2020.106255


JYU authors or editors


Publication details

All authors or editors: Erkkilä, Anna-Leena; Leppänen, Teemu; Virkajärvi, Jussi; Parkkonen, Joni; Turunen, Leena; Tuovinen, Tero

Journal or series: Cement and Concrete Research

ISSN: 0008-8846

eISSN: 1873-3948

Publication year: 2021

Volume: 139

Article number: 106255

Publisher: Elsevier

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1016/j.cemconres.2020.106255

Publication open access: Not open

Publication channel open access:


Abstract

The effect of porosity comprised of spherical air voids on the compressive strength of quasi-brittle material was studied via simulations. The simulated porous structures were based on pore size distributions of two mortar samples measured by X-ray microtomography. While the simulation method set practical limits on the size of sample, the base of the statistics was established by simulating 128 small structures generated by sampling from pore structures of two mortars. By studying the application of the classical strength-porosity formulas to the simulated data, a new simple model was formed. A linear relationship was achieved between the cubic root of air void fraction (porosity) and the simulated compressive strength. The reasons for scattering of simulated strength around fitted trend remained unresolved in this study; no clear dependence on pore number or other distribution properties was observed. With the presented simulation approach, the dependence of compressive strength on porosity is achieved independently of disturbances that occur in experimental studies creating understanding of compressional behavior of low porosity materials.


Keywords: material technology; plaster; porosity; compression strength; simulation; models (objects); finite element method

Free keywords: porosity; mortar; compressive strength; finite element method; simulation; model


Contributing organizations


Ministry reporting: Yes

Reporting Year: 2021

Preliminary JUFO rating: 3


Last updated on 2021-07-07 at 17:54