Influence of Silica Fume on the Performance of Moderately Weathered Phonolite Concrete

The effect of silica fume on the performance, mechanical properties, durability and air tightness airtight concrete was studied. results showed that with increase content, performance will decrease, compressive strength first, reach highest when content 8%, then it decrease gradually. With corrosion resistance coefficient increased gradually, decreased. permeability decreases improved obviously; In project, advisable to use prepare concrete, amount should be controlled at 4% - 8%.