摘要
This paper presents the mechanical and thermal properties of flax fabric reinforced fly ash based geopolymer composites.Geopolymer composites reinforced with 2.4,3.0 and 4.1 wt%woven flax fabric in various layers were fabricated using a hand lay-up technique and tested for mechanical properties such as flexural strength,flexural modulus,compressive strength,hardness,and fracture toughness.All mechanical properties were improved by increasing the flax fibre contents,and showed superior mechanical properties over a pure geopolymer matrix.Fourier transform infrared spectroscopy(FTIR)and scanning electron microscopy(SEM)studies were carried out to evaluate the composition and fracture surfaces of geopolymer and geopolymer/flax composites.The thermal behaviour of composites was studied by thermogravimetric analysis(TGA)and the results showed significant degradation of flax fibres at 300℃.
