添加GYH高抗渗混凝土的结构特性研究

Study on Properties of High Permeability resistant Concrete with Addition of GYH

通过测定氯离子扩散系数、孔结构、水抗渗系数和ＳＥＭ观察，研究了减水剂、引气剂、微细集料复合添加剂对水泥净浆、砂浆和混凝土结构特性的影响。结果表明：添加ＧＹＨ①可通过减水、引气和化学反应的协同作用，减小开口孔体积、阻断毛细孔、增加Ｃ－Ｓ－Ｈ凝胶和改善过渡区结构，从而大幅度提高材料的抗渗性能，并有利于材料强度的提高。

In this paper, the effects of compound additive that is consisted of water reducing agent(G), air entraining admixture(Y), micro aggregate(H) on cement paste, mortar and concrete structure were studied by determining Cl - diffusion coefficient, pore structure, water impermeability coefficient and SEM observation. The results showed that, by the co action of reducing water, entraining air and chemical reaction, GYH compound additive has the effects of reducing continuous pore volume, clogging up capillary pores, increasing C S H gel quantity and ameliorating the structure of transition zone. It can improve permeability resistant ability of material considerably and is beneficial to the improvement of material strength.