TY - JOUR
T1 - Combined experimental and numerical study of uniaxial compression failure of hardened cement paste at micrometre length scale
AU - Zhang, Hongzhi
AU - Xu, Yading
AU - Gan, Yidong
AU - Chang, Ze
AU - Schlangen, Erik
AU - Šavija, Branko
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 - 2019
Y1 - 2019
N2 - The aim of this work is to investigate the mechanical performance of hardened cement paste (HCP) under compression at the micrometre length scale. In order to achieve this, both experimental and numerical approaches were applied. In the experimental part, micrometre sized HCP specimens were fabricated and subjected to uniaxial compression by a flat end tip using nanoindenter. During the test, the load-displacement curves can be obtained. In the modelling part, virtual micrometre sized specimens were created from digital material structures obtained by X-ray computed tomography. A computational compression test was then performed on these virtual specimens by a discrete lattice fracture model using the local mechanical properties calibrated in the authors' previous work. A good agreement is found between the experimental and numerical results. The approach proposed in this work forms a general framework for testing and modelling the compression behaviour of cementitious material at the micrometre length scale.
AB - The aim of this work is to investigate the mechanical performance of hardened cement paste (HCP) under compression at the micrometre length scale. In order to achieve this, both experimental and numerical approaches were applied. In the experimental part, micrometre sized HCP specimens were fabricated and subjected to uniaxial compression by a flat end tip using nanoindenter. During the test, the load-displacement curves can be obtained. In the modelling part, virtual micrometre sized specimens were created from digital material structures obtained by X-ray computed tomography. A computational compression test was then performed on these virtual specimens by a discrete lattice fracture model using the local mechanical properties calibrated in the authors' previous work. A good agreement is found between the experimental and numerical results. The approach proposed in this work forms a general framework for testing and modelling the compression behaviour of cementitious material at the micrometre length scale.
KW - Compressive strength
KW - Hardened cement paste
KW - Lattice modelling
KW - Micromechanics
KW - Nanoindenter
UR - http://www.scopus.com/inward/record.url?scp=85073729356&partnerID=8YFLogxK
U2 - 10.1016/j.cemconres.2019.105925
DO - 10.1016/j.cemconres.2019.105925
M3 - Article
AN - SCOPUS:85073729356
VL - 126
JO - Cement and Concrete Research
JF - Cement and Concrete Research
SN - 0008-8846
M1 - 105925
ER -