Abstract
CaCO3 fillers offer high stiffness and impact resistance, but their rigid, brittle behaviour makes it challenging to attain good tensile properties in epoxy matrices. Herein, we report a high tensile strength and stiff nano-CaCO3 /epoxy composites engineered via planetary ball milling for the first time. Remarkable improvement in strength of ∼ 51% (51.90 MPa) and modulus of ∼ 28% (522.62 MPa) at 1 wt% was observed with respect to micron-sized counterparts. A fascinating observation of ∼ 40% enhancement in ductility was also seen. The results imply that nano-CaCO3 particles (38–52 nm) showed promising results to be used as sustainable concrete nanofiller in greener construction industry and other commercial building applications.
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