净水功能型粉煤灰透水混凝土性能研究

Performance of Fly Ash Pervious Concrete with Water Purification Function

通过向透水混凝土中引入净化材料(粉煤灰、硫酸改性粉煤灰),制备了具有净水功能的透水混凝土,研究了净化材料掺量对透水混凝土力学性能、孔隙率、透水性能及吸附水中Zn^(2+)性能的影响.结果表明:硫酸改性粉煤灰能够促进水化硅酸钙凝胶的生成,改善透水混凝土的孔隙结构,提高其力学性能和对Zn^(2+)的吸附效果;当硫酸改性粉煤灰掺量为20%时,透水混凝土试件的抗压强度达到峰值,孔隙率与透水系数降到最低值;随着净化材料掺量的增加,透水混凝土对Zn^(2+)的吸附效果逐渐明显.

Pervious concrete with water purification function was prepared by introducing purification materials(fly ash,sulfuric acid modified fly ash)into pervious concrete.The effects of purification material content on mechanical properties,porosity,water permeability and adsorption of Zn^(2+)in water of pervious concrete were studied.The results show that the addition of sulfuric acid modified fly ash can promote the formation of hydrated calcium silicate gel,improve the pore structure of pervious concrete,and improve the mechanical properties and Zn^(2+)adsorption effect.When the use level of sulfuric acid modified fly ash is 20%,the compressive strength of pervious concrete specimens reaches the peak,and the porosity and permeability coefficient decrease to the lowest value.With the increase of use level of purification materials,the adsorption effect of Zn^(2+)of pervious concrete is gradually obvious.