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Modelling of irregular-shaped cement particles and microstructural development of Portland cement

Liu, C; Huang, R; Zhang, Y; Liu, Z; Zhang, M; (2018) Modelling of irregular-shaped cement particles and microstructural development of Portland cement. Construction and Building Materials , 168 pp. 362-378. 10.1016/j.conbuildmat.2018.02.142. Green open access

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Abstract

The shape of cement powder particles plays a crucial role in particle packing and hydration process of cement. However, cement powder is generally regarded as sphere for simplification in most cement hydration models. This paper aims to investigate the influence of cement particle shapes on hydration of Portland cement and microstructure of cement paste. A novel central growth model along with a particle packing algorithm is developed to generate cement particles with irregular shapes and reconstruct initial 3D microstructures of Portland cement. Afterwards, the hydration process of cement with different shapes are simulated using CEMHYD3D model. The results indicate that the generated irregular-shaped particles precisely reproduce the real cement particles in terms of surface area, particle size distribution and geometry. The effect of particle shapes on hydration is significant due to the difference in surface area and geometric discrepancy, whereas this effect becomes less obvious with decreasing water-to-cement ratio.

Type: Article
Title: Modelling of irregular-shaped cement particles and microstructural development of Portland cement
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.conbuildmat.2018.02.142
Publisher version: https://doi.org/10.1016/j.conbuildmat.2018.02.142
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Cement hydration; Particle shape; Particle packing; Microstructure; Setting; Connectivity
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10044206
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