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Micromechanical testing and modelling of blast furnace slag cement pastes. / Šavija, Branko; Zhang, Hongzhi; Schlangen, Erik.

In: Construction and Building Materials, Vol. 239, 117841, 2020.

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@article{c874b613bde34403a790bd68156187ec,
title = "Micromechanical testing and modelling of blast furnace slag cement pastes",
abstract = "This work aims to understand deformation and fracture processes in blast furnace slag cement pastes made using CEM III/B which is commonly used in the Dutch infrastructure sector. First, based on our previous work on Portland cement pastes, a micromechanical model utilizing nanoindentation and X-ray computed tomography (CT) for input is created. Statistical analysis are carried out and shows that grayscale values from X-ray CT scans of slag pastes can be linearly correlated with nanoindentation measurements of elastic modulus. Simulations of uniaxial tension are then performed for varying w/c ratios using the Delft lattice model and microstructure obtained from X-ray CT. In addition, advanced micromechanical experiments for estimating the micro-scale tensile strength and elastic modulus are performed. Experimental and simulation results are then critically discussed and compared. It shows that simulation results match the measured tensile strength quite well although some discrepancy does exist at lower w/c ratios. In addition, the observations are compared to our previous findings on ordinary Portland cement pastes. It is found that tensile strength and elastic moduli of slag pastes at 28 days are higher than those of Portland cement pastes with the same w/c ratio. This study will form a basis for micromechanical testing and modelling of blended cement paste systems in the future.",
keywords = "Experimental testing, Lattice model, Micromechanics, Nanoindentation",
author = "Branko Šavija and Hongzhi Zhang and Erik Schlangen",
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.",
year = "2020",
doi = "10.1016/j.conbuildmat.2019.117841",
language = "English",
volume = "239",
journal = "Construction and Building Materials",
issn = "0950-0618",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Micromechanical testing and modelling of blast furnace slag cement pastes

AU - Šavija, Branko

AU - Zhang, Hongzhi

AU - Schlangen, Erik

N1 - 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.

PY - 2020

Y1 - 2020

N2 - This work aims to understand deformation and fracture processes in blast furnace slag cement pastes made using CEM III/B which is commonly used in the Dutch infrastructure sector. First, based on our previous work on Portland cement pastes, a micromechanical model utilizing nanoindentation and X-ray computed tomography (CT) for input is created. Statistical analysis are carried out and shows that grayscale values from X-ray CT scans of slag pastes can be linearly correlated with nanoindentation measurements of elastic modulus. Simulations of uniaxial tension are then performed for varying w/c ratios using the Delft lattice model and microstructure obtained from X-ray CT. In addition, advanced micromechanical experiments for estimating the micro-scale tensile strength and elastic modulus are performed. Experimental and simulation results are then critically discussed and compared. It shows that simulation results match the measured tensile strength quite well although some discrepancy does exist at lower w/c ratios. In addition, the observations are compared to our previous findings on ordinary Portland cement pastes. It is found that tensile strength and elastic moduli of slag pastes at 28 days are higher than those of Portland cement pastes with the same w/c ratio. This study will form a basis for micromechanical testing and modelling of blended cement paste systems in the future.

AB - This work aims to understand deformation and fracture processes in blast furnace slag cement pastes made using CEM III/B which is commonly used in the Dutch infrastructure sector. First, based on our previous work on Portland cement pastes, a micromechanical model utilizing nanoindentation and X-ray computed tomography (CT) for input is created. Statistical analysis are carried out and shows that grayscale values from X-ray CT scans of slag pastes can be linearly correlated with nanoindentation measurements of elastic modulus. Simulations of uniaxial tension are then performed for varying w/c ratios using the Delft lattice model and microstructure obtained from X-ray CT. In addition, advanced micromechanical experiments for estimating the micro-scale tensile strength and elastic modulus are performed. Experimental and simulation results are then critically discussed and compared. It shows that simulation results match the measured tensile strength quite well although some discrepancy does exist at lower w/c ratios. In addition, the observations are compared to our previous findings on ordinary Portland cement pastes. It is found that tensile strength and elastic moduli of slag pastes at 28 days are higher than those of Portland cement pastes with the same w/c ratio. This study will form a basis for micromechanical testing and modelling of blended cement paste systems in the future.

KW - Experimental testing

KW - Lattice model

KW - Micromechanics

KW - Nanoindentation

UR - http://www.scopus.com/inward/record.url?scp=85076691793&partnerID=8YFLogxK

U2 - 10.1016/j.conbuildmat.2019.117841

DO - 10.1016/j.conbuildmat.2019.117841

M3 - Article

VL - 239

JO - Construction and Building Materials

T2 - Construction and Building Materials

JF - Construction and Building Materials

SN - 0950-0618

M1 - 117841

ER -

ID: 68305054