Experimental Study on Anti-freezing Performance of Municipal Waste Incineration Ash Concrete
To investigate the influence of different quality grades of municipal solid waste incineration ash as fine aggregates on the frost resistance of cement concrete,a mix design was conducted using three replacement levels of fine aggregates (0,25%,50%) and three water-to-binder ratios (0.25,0.4,0.55).Concrete's dynamic modulus of elasticity,mass loss rate,as well as indicators including air content,specific surface area,pore spacing factor,and average pore chord length were tested to analyze the frost resistance of concrete under various incineration ash substitution rates.The results indicate that,similar to ordinary concrete,the extent of freeze-thaw damage in ash concrete increases with higher water-to-binder ratios.An increase in the substitution rate of incineration ash enhances the frost resistance grade of the concrete,and its angular characteristics reduce the degradation rate of concrete under freeze-thaw conditions.The macroscopic frost resistance and microstructure are optimal when using a 0.25 water-to-binder ratio with a 50% substitution rate,meeting the requirements of engineering practice.
municipal wasteincinerated ash concretesubstitution ratefrost resistance
万方数据
维普
