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- W127777346 abstract "With support from the Silica Fume Association, cores were obtained in 2001 and 2002 from four concretes from bridge decks in New York State and one in Ohio which were 15 years old and which had been exposed to de-icing salts. The Ohio bridge was 15 years old and made with silica fume concrete (477kg/m3 cementitious materials with 14.3% silica fume, 0.33 w/cm). The New York bridges included a 6 year old Portland cement concrete (0.42 w/c, 400kg/m3), a 6 year old, 0.40 concrete with 20% F-fly ash and 6% silica fume (400kg/m3), a 7 year old, 11% silica fume, 0.37 concrete (455kg/m3), and a 12 year old silica fume concrete overlay ( 6% silica fume, 0.40, 400kg/m3). The cores were tested for chloride penetration profiles using mm profiling, chloride bulk diffusion by ASTM C 1556, rapid chloride penetration (ASTM C 1202), and the depth of cover was noted, where visible. The results show that all of the silica fume concrete decks had high chloride penetration resistance, with all full depth decks having between 290 and 690 coulombs on average, while the portland cement concrete had 3900 coulombs. Predicted time-tocorrosion service life, using the Life-365 program, gave residual life estimates of between 30 and 61 years for the silica fume concretes. A portland cement concrete, used as a control, was found to be likely subject to corrosion at the time of coring. Predicted residual service lives based on extrapolation from existing chloride penetration profiles gave longer estimates by 10-years on average for the 3 new bridges made using silica fume concrete." @default.
- W127777346 created "2016-06-24" @default.
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- W127777346 date "2008-01-01" @default.
- W127777346 modified "2023-09-24" @default.
- W127777346 title "Long-Term Chloride Penetration Resistance of Bridge Decks made with Silica Fume" @default.
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