Parameter Optimization and Compressive Test Study of Dune Sand Engineered Geopolymer Composite
To determine the optimal mix of dune sand in Engineered Geopolymer Composite(EGC),this study provided insights for subsequent research and engineering applications involving dune sand EGC.Twelve groups of cubic specimens of dune sand EGC underwent compression tests,and four groups of axial compression tests of dune sand EGC were conducted.The observed failure modes and recorded compressive strengths were analyzed.The effects of dune sand replacement ratio,NaOH solution concentration,water-glass modulus,and PE fiber content on the compressive strength of dune sand EGC were quantified.Furthermore,further analysis was conducted on the stress-strain curves under axial compression,and a constitutive relationship model suitable for dune sand EGC was proposed.The maximum compressive strength of EGC was achieved when the dune sand replacement ratio was 50%.Under complete dune sand replacement,a NaOH solution concentration of 20%,a water glass modulus of 1.1,and a PE fiber content of 2%were selected as the optimal combination for dune sand EGC compressive strength.The study affirmed the feasibility of preparing EGC by incorporating a specific proportion of dune sand,and this proposed constitutive model accurately predicts the uniaxial compressive behavior of dune sand EGC.
万方数据
维普
