This article provides a concise overview of the modification mechanism of silver nanoparticles-functionalized multiwalled carbonnanotube (Ag-PM-WCNT), ground granulated blast furnace slag (GGBFS), and carbon quantum dots (CQD) on the mechanical andreliability properties of structural geopolymer reinforced-composite beams (GR-CBs). The structural GR-CBs were prepared with ageopolymer binder which included sodium carbonate and hydrated lime, GGBFS, Ag-PM-WCNT, and CQD, as well as the SP. Anumber of features were tested at 7, 28, 90, 180, 365, 2185, and 4370 days, including, compactness, porosity, shear, bending, andcompressive strengths, Young's modulus, and SEM analysis, as well as fluidity of fresh state of GR-CBs. AQ1 The outcomes indicatethat 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 concurrentlyincreasing the shear, bending, and compressive strengths by more than 104%, 160%, and 180%, respectively. AQ2 The mostremarkable shear, bending, and compressive strengths were observed in GR-CB11, measuring 9.5 MPa, 10.6 MPa, and 75 MParespectively, after 4370 days. The Young's modulus of the GR-CB, which includes Ag‒PM‒WCNT, GGBFS, and CQD, demonstrated asignificant enhancement, alongside a remarkable level of densification within the microstructure and a variety of constitutivemathematical models. Therefore, developed