Effect Mechanism of Sludge Incineration Ash Affecting Cement-Based Materials
SONG Yilun
GU Shuaizu
SUN Zixuan
YU Qianqian
WU Kai
Abstract：To achieve the efficient and resourceful utilization of sludge incineration ash(SIA),starting from the influence of SIA on the particle accumulation state,fluidity and mechanical properties of cement-based materials,the influence of SIA on the hydration process and microstructure was analyzed by hydration heat,phase composition and pore structure.The results show that the irregular morphology and high absorption characteristics of SIA reduce the fluidity of cement pastes,and the reduction increases with the increase of SIA dosage.The overall packing density of the cement-based materials can be improved by SIA for its board particle size distribution.An appropriate amount(5%mass fraction)of SIA can promote the generation of hydration products and the refinement of the pore structure through filling,nucleation,and pozzolanic reactions,thereby improving the mechanical properties of cement-based materials.A high dosage(30%mass fraction)of SIA leads to the decrease of hydration products,the increase of porosity,and the decrease of mechanical properties due to its porous characteristics and dilution effect.
Keywords：sludge incineration ashcompressive strengthfluidityhydrationmechanism
Publication Date：2025-09-30
Online Publishing Date：2025-10-17(First online date of this platform, not the publication date of the document)
Pages：10( 893-902 )