HES conc. for bridge deck

[Drumchaser]

Anybody ever tried this? The HES would be high early strength concrete used to pour a new bridge slab.

 

[bridgebuster]

It's been done before; could you be more specific?

 

[Drumchaser]

24 hr. strength in order to increase productivity.

PL girder structure.

 

[DRC1]

What is a PL girder?
What strength do you need in 24 hrs vs. 28 days? In the end acceptance is up to the engineer. I find HE a little more difficult to work with and somewhat more expensive. I have have used normal mixes that were 1-2,000 psi higher than specified to get early strength. Ie if you need 3,000 lookat using 5,000. HE does have heat and cracking considerations. Not that it does not work, it works fine, just have to be more careful.

 

[Qshake]

I believe the poster is referring to plate girder (PL).

I agree with the comments above, it's been done but is not generally worth the headache.

Regards,
Qshake

Eng-Tips Forums:Real Solutions for Real Problems Really Quick.

 

[bridgebuster]

NYSDOT is using a high early strength concrete for the reconstruction of the deck on the Gowanus Expressway in Brooklyn. This sounds like what yuou're looking for. Gowanus carries over 150,000 vpd and lane closures are not an option.

However there are a number of things to consider: On this project maturity meters are placed in the slab to determine its strength; the meters are calibrated based on actual cylinder breaks.

If you're interested call the DOT's Regional Materials Engineer or Regional Construction Engineer. The DOT Region is 11. Sorry but Eng-Tips froms on posting phone numbers.