掺合料对轻集料混凝土抗渗性的影响

摘要

研究了单掺粉煤灰及粉煤灰、沸石粉、硅粉复掺对轻集料混凝土抗渗性与孔结构的影响,并将轻集料混凝土抗渗性与普通混凝土做了对比.结果表明,掺加矿物掺合料轻集料混凝土将获得更高的抗渗性；复掺对轻集料混凝土抗渗性更有利；轻集料混凝土抗渗性优于相同强度等级普通混凝土；LC40轻集料混凝土抗渗性与C60普通混凝土抗渗性相当.掺加矿物掺合料能明显改善轻集料混凝土的孔结构,小孔增多,总孔隙率降低.%The experimental research of impermeability and pore structure of light aggregate concrete was carried out , with the single mixing fly ash and composite addition of mineral admixture ( fly ash, zeolite powder, silicon powder) and ordinary concrete are compared. The results show that adding mineral admixture light-weight aggregate concrete will get higher impermeability; impermeability of light-tweight aggregate concrete is more advantageous; impermeability of light-weight aggregate concrete is better than that of the same strength grade ordinary concrete ; LG40 light-weight aggregate concrete impermeability is the common concrete quite. Adding mineral admixture can obviously improve pore structure of the light-weight aggregate concrete, small pore increased, the total porosity reduce.