Fracture of cement hydrates determined from micro-scratching tests and their modeling

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F22%3A00367180" target="_blank" >RIV/68407700:21110/22:00367180 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1201/9781003316404-7" target="_blank" >https://doi.org/10.1201/9781003316404-7</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1201/9781003316404-7" target="_blank" >10.1201/9781003316404-7</a>

Result language
angličtina
Original language name
Fracture of cement hydrates determined from micro-scratching tests and their modeling
Original language description
The paper shows both experimental and numerical results for micro-scratching tests applied to main hydration products of cement paste at the scale of 10–100 μm. In the experimental part, micro-scratch tests were conducted along with scanning electron microscopy and acoustic emission measurements to reveal local fracture toughness of individual cement paste constituents. 3-D finite element model of the scratch process utilizing Griffith-type of a fracture-damage model for tension/compression failure was successfully used for replication of the experiments and identification of local cement paste strength. The tensile strength for the outer hydration product was identified as 54 MPa being about 5 times lower compared to FIB-produced microcantilevers at 3 μm scale (Němeček, Králík, Šmilauer, Polívka, & Jäger 2016) and about 3.6 times higher than at 500 μm scale (Zhang, Šavija, Figueiredo, & Schlangen 2017). The strong size effect can be attributed to a different number of internal defects in the cement paste microstructure.
Czech name
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Czech description
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Project
<a href="/en/project/GA21-11965S" target="_blank" >GA21-11965S: Microstructural investigation and simulation of coupled physical fields in concrete due to electromigration treatments</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Computational Modelling of Concrete and Concrete Structures
ISBN
9781003316404
ISSN
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e-ISSN
—
Number of pages
7
Pages from-to
59-65
Publisher name
CRC Press
Place of publication
London
Event location
Vídeň
Event date
May 23, 2022
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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