MCI-2000钢筋阻锈剂对于桥梁甲板的防腐蚀应用
Minnesota D.O.T. Study Project
LOCATION
Randolph St. Over I-35 in St. Paul, MN
PRODUCT
MCI-2000
HISTORY
The Randolph St. bridge deck was rehabilitated in 1986. This included milling the deck to a depth of
0.5 inches (13mm) and removing areas of unsound concrete. A patch and overlay with low
slump dense concrete (LSDC) was applied. The eastbound lane was used as control, while the west bound lane was treated with MCI-2000 admixture at 1 pint per cubic yard (0.6 liter per cubic
meter).
The year 2000 update showed neither side has entered active corrosion. However, the MCI®
treated side still has lower corrosion potentials and corrosion rates than the control side. Chloride
analysis showed the MCI® treated side should not initiate corrosion until the year 2022, while the
control side should begin corroding in the year 2005 (17 year increase in service life).
Gas Chromatography analysis showed the presense of MCI-2000 at a 3” depth after 15 years, on the treated side, while no MCI-2000 was on the control side (as expected).
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