不同掺合料对桥面高性能混凝土抗渗性能的影响研究OA

In order to investigate the effect of mineral admixtures on the permeability of high performance concrete on bridge floor,the imper-meability of high performance concrete with 30%fly ash and 45%mineral powder as admixtures was tested.The results show that the incorpo-ration of fly ash has adverse effects on the early capillary adsorption rate,gas permeability coefficient,electric flux and chloride ion diffusion coefficient of concrete,but can improve the late capillary adsorption rate,gas permeability coefficient,electric flux and chloride ion diffusion coefficient of concrete.At the same time,it will have a positive effect on the early impermeability of concrete,and a negative effect on the later impermeability of concrete.