Modification mechanism of silver nanoparticles-functionalized MW-CNT and GGBFS and CQDs on the structural properties of geopolymer reinforced-composite beam.

This article provides a concise overview of the modification mechanism of silver nanoparticles-functionalized multiwalled carbon nanotube (Ag-PM-WCNT), ground granulated blast furnace slag (GGBFS), and carbon quantum dots (CQD) on the mechanical and reliability properties of structural geopolymer reinforced-composite beams (GR-CBs). The structural GR-CBs were prepared with a geopolymer binder which included sodium carbonate and hydrated lime, GGBFS, Ag-PM-WCNT, and CQD, as well as the SP. A number of features were tested at 7, 28, 90, 180, 365, 2185, and 4370 days, including, compactness, porosity, shear, bending, and compressive strengths, Young's modulus, and SEM analysis, as well as fluidity of fresh state of GR-CBs. The outcomes indicate that the incorporation of 0.5-0.7 wt% Ag‒PM‒WCNT and 2.5 wt% CQD leads to a decrease in fluidity and porosity while concurrently increasing the shear, bending, and compressive strengths by more than 104%, 160%, and 180%, respectively. The most remarkable shear, bending, and compressive strengths were observed in GR-CB11, measuring 9.5 MPa, 10.6 MPa, and 75 MPa respectively, after 4370 days. The Young's modulus of the GR-CB, which includes Ag‒PM‒WCNT, GGBFS, and CQD, demonstrated a significant enhancement, alongside a remarkable level of densification within the microstructure and a variety of constitutive mathematical models. Therefore, developed GR-CB has the potential to facilitate practical implementation in real-world structure projects and infrastructure renewal.