Fracture toughness of cement paste assessed with micro-scratch and acoustic emission

0579670 - FZÚ 2024 RIV PL eng C - Conference Paper (international conference)
Němeček, J. - Čtvrtlík, Radim - Václavek, Lukáš - Němeček, J.
Fracture toughness of cement paste assessed with micro-scratch and acoustic emission.
Proceedings of the conference Local Mechanical Properties. Warszawa: de Gruyter, 2022 - (Hvizdoš, P.; Shepa, I.; Ondrejová, K.; Bureš, R.; Martin, T.), s. 7-13. E-ISSN 1339-4533.
[International Conference on Local Mechanical Properties /15./. Košice (SK), 11.05.2022-13.05.2022]
Institutional support: RVO:68378271
Keywords : scratch test * acoustic emission * fracture toughness * cement paste * microindentation
OECD category: Materials engineering
https://sciendo.com/article/10.2478/pmp-2022-0002

Micro-scratch test was used to evaluate the fracture toughness of the main hydration products of ordinary Portland cement paste at the microscale. The evaluation was done with the aid of scanning electron microscopy and acoustic emission (AE) signals. Portlandite was found to be the only phase where AE detected elastic waves due to cracking during microindentation and micro-scratch test. Such behavior simplifies phase separation during the evaluation process of the micro-scratch test. The micro-scale fracture toughness results obtained from the tests were found in close agreement with other available experiments and models in the literature.

Permanent Link: https://hdl.handle.net/11104/0348486