Understanding the effect of nano-zirconia on the compressive fatigue performance of cementitious composites

Linwei Li, Xinyue Wang, Liangsheng Qiu, Farhad Aslani, Baoguo Han

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The fatigue performance of cementitious composites that affects the service life of structures is particularly sensitive to the initial defects in cementitious matrix and interfacial transition zone. Nano-ZrO2 (NZ), characterized by high strength and toughness as well as good dispersibility, can improve the compactness of cementitious composites. This paper investigated the modifying effect and mechanisms of NZ on the compressive fatigue performance of cementitious composites, including fatigue life, strength, and deformation behaviors. The experimental results show that adding NZ extends the fatigue life of cementitious composites by an order of magnitude and increases the fatigue failure strain by 11.9%. The microstructural analysis verifies that NZ can deflect the fatigue micro-cracks, fill the micro-pores and reduce the growth space of CH crystal size. The modified microstructures potentially lead to fatigue of cementitious composites starting from generating more nano-cracks in both cementitious matrix and interfacial transition zone, thereby improving the fatigue performance of the composites.

Original languageEnglish
Pages (from-to)4269-4285
Number of pages17
JournalFatigue and Fracture of Engineering Materials and Structures
Volume46
Issue number11
DOIs
Publication statusPublished - Nov 2023

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