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Hamilton
County High Performance Concrete |
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The Hamilton County
Engineer's Office has been using a high performance concrete for Bridge
Decks and Bridge Deck Overlays for the past 15 years. Hamilton County
Engineer Bill Brayshaw, believes that the key to achieving a durable chloride resistant, dense, concrete with low permeability is to start with the basics of low water cement ratio, reduction of fines, use of chemical admixtures, such as water reducers and set retarders,
silica fume, corrosion inhibitors and the addition of fibers to reduce cracking due to plastic shrinkage. Numerous projects have been completed using this
High Performance Mix Design including the following bridges that have exhibited minimal or no deck cracking. |
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Road |
Bridge |
Deck Area |
Comments |
| Elliot
Avenue |
AHT-0020 |
84'
X 32' |
No
cracking |
| Lawrenceburg |
B-0325 |
775'
x 32' |
No
cracking concrete beams |
| Wooster |
FAI-0008 |
300'
x 46' |
Minor
cracking steel beams |
| Hopewell |
B-0310 |
305'
x 42' |
No
cracking concrete beams |
| Blue
Rock |
B-0009 |
600'
x 6' |
One
minor crack |
| Benson
Street |
REA/LOC-0000 |
73'
x 50 |
No
cracking / concrete through arch |
| West
Road |
B-0270 |
132'
x 35' |
No
cracking |
| Wyoming
Avenue |
LOC-0097 |
102'
x 40' |
Minor
cracking over pier / concrete I-beams |
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Hamilton County will continue to improve the quality and durability of the high performance concrete bridge decks by specifying an improved grading of the aggregates. For more information on High Performance Concrete, contact the Bridge Department at (513)
946-8418. |
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Hamilton
County Engineer