Experimental Investigation on the Mechanical Characteristics of Cement-Based Mortar Containing Nano-Silica, Micro-Silica, and PVA Fiber

This paper investigates bending and compressive strengths as mechanical characteristics of cement-based repair mortar containing nano-silica (NS) micro-silica (SF) cement replacements particles polyvinyl alcohol (PVA) fibers. The mentioned materials were added to the in three different conditions, including single (just one material), binary (mixture two admixtures), ternary all admixtures) modes. use PVA fibers, triple combination a is primary objective current research. In total, 28 mix designs with various percentages fiber employed study, 112 specimens prepared conduct experimental flexural strength results have been selected criteria for obtaining optimum design each condition. order specify specimens, test was carried out according ACI 318, three-point utilized BS EN 1015-11. obtained from this study show that mixture 10% silica fume (SF10) can be considered single-mode For such design, increase 27% improvement 48% determined comparison reference design. at 2% 8% (NS2SF8) mode With 24% 49% 28-day specimen recorded. Finally, under condition, enhancement 3.5% 4.6% obtained. Additionally, content 0.75% an SF (PVA0.75SF10) optimum.