Gray correlation analysis of factors influencing compressive strength and durability of nano-SiO₂ and PVA fiber reinforced geopolymer mortar

Abstract To investigate the mechanical properties and durability of nano-SiO 2 , polyvinyl alcohol (PVA) fiber-modified fly ash (FA), metakaolin (MK)-based geopolymer mortar (FMGM), tests compressive strength, electrical flux, freeze–thaw cycles, sulfate dry wet cycles were conducted. Based on experimental results, combined with Dunn’s gray correlation theory analysis method, a mathematical effect sensitivity contents four mixtures FMGM was carried out. The method can solve problem partial unclear uncertain information, requires less data computation compared other method. results showed that degree between content MK electric flux value is higher than comparison sequence each reference sequence, while PVA fiber dosage loss rate strength lower sequence. influence mixture mass in following decreasing order: FA, fiber, . In addition, material consistent fiber. Furthermore, reached optimum when 0.6% 1.0%. this study provide new for evaluation fiber-reinforced future.