Improving Geopolymer Characteristics with Addition of Poly-Vinyl Alcohol (PVA) Fibers

This paper presents the benefits of PVA fibers in improving mechanical properties class F fly-ash-based geopolymer concrete. The activator used was 8M sodium hydroxide (NaOH) and silicate (Na2SiO3), with a mass ratio Na2SiO3 to NaOH varied from 1.5 2.5. Cylindrical specimens diameter 100 mm height 200 were prepared for strength tests. geopolymers fixed at 0.4%, 0.6%, 0.8% by total volume. Some tests carried out, including compression, splitting, direct tensile elastic modulus It found that mixture alkalis fiber content 0.4% had best workability. highest compressive obtained alkali ratios 2.0, 0.6% addition. (and splitting-tensile) increase certain amount activators. workability issue direction concrete dominant factors influencing