Asphalt repair for timber bridge decks
Asphalt repair for timber bridge decks
(OP)
We are considering using tack coat, non-woven geotextile, and a 2" asphalt concrete pavement overlay to extend the deck life of a 16' x 80' steel beam timber decked bridge. HAs such a project been done and evaluated?





RE: Asphalt repair for timber bridge decks
I think the geotextile idea itself is good - it should reduce cracking of the asphalt and increase the life of the wearing surface.
Let us know what you decide to do.
RE: Asphalt repair for timber bridge decks
I'd use 140 lb/CF.
The rotting previously suggested is a true concern.
Is the timber deck a single layer? Often that top surface is in 2 layers.
Is the deck going to drain OK?
RE: Asphalt repair for timber bridge decks
RE: Asphalt repair for timber bridge decks
The township wanted to preserve the wrought iron truss, but was concerned about the weight limit. So, we ended up putting a new steel grid deck on the bridge, it was half the weight of the timber and ashpalt. That might be a solution for you to think about.
One thing to keep in mind, steel grid decks can be pretty slippery in the rain or snow, so post a low speed limit for the bridge.