**4. Conclusions**

In this study, NCa-ECC blends were prepared by replacing 0.5, 1, and 1.5 proportions of nanocalcite in the binder of the prepared blends. Compressive strength, flexural strength, and UPV tests were carried out to investigate the mechanical properties of the NCa-ECC mixes. In addition, SEM analyses were carried out to investigate the microstructural properties of the specimens. As a result of these tests, the following results were obtained:


**Author Contributions:** Conceptualization, M.Z., S.E., Y.T. and R.A.G.L.; methodology, M.Z., S.E. and Y.T.; formal analysis, M.Z., S.E. and Y.T.; investigation, M.Z., S.E. and Y.T.; resources, M.Z., S.E., Y.T. and R.A.G.L.; data curation, M.Z. and S.E.; writing—original draft preparation, M.Z., S.E. and Y.T.; writing—review and editing, M.Z., S.E. and R.A.G.L.; visualization, M.Z., S.E. and Y.T.; supervision, R.A.G.L.; project administration, M.Z., S.E., Y.T. and R.A.G.L.; funding acquisition, R.A.G.L. All authors have read and agreed to the published version of the manuscript.

**Funding:** The authors wish to thank CEU San Pablo University Foundation for the funds dedicated to the project ref. MCP21V12 provided by CEU San Pablo University.

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** The data presented in this study are available on request from the corresponding author.

**Conflicts of Interest:** The authors declare no conflict of interest.
