Concrete Cover
Concrete Cover
(OP)
Hi,
I have a situation where a concrete beam has been poured without the specified cover for reinforcing steel stirrups on one side. I have checked shear and torsion and one leg of the ties would be sufficient. Can one consider rendering the beam with a 3:1 sand:concrete mortar to provide the necessary cover?
Thanks
I have a situation where a concrete beam has been poured without the specified cover for reinforcing steel stirrups on one side. I have checked shear and torsion and one leg of the ties would be sufficient. Can one consider rendering the beam with a 3:1 sand:concrete mortar to provide the necessary cover?
Thanks






RE: Concrete Cover
Dik
RE: Concrete Cover
You should use a concrete repair mortar and bonding agent made specifically for patching spalled concrete. Google it.
RE: Concrete Cover
RE: Concrete Cover
I am more concerned about corrosion since the structure is close to the sea. Any comment about the render?
Thnx
RE: Concrete Cover
http://www.lsepoxies.com/
http:/
http://www.chemmasters.net/RepairMortars.htm
Use of anything else would be neglecting your duty of care for your client. And it is no more work than putting on a render.
RE: Concrete Cover
RE: Concrete Cover
RE: Concrete Cover
RE: Concrete Cover
We have about 15mm right now
RE: Concrete Cover
RE: Concrete Cover
RE: Concrete Cover
I don't know what you mean exactly but we have 15mm cover to one side of the stirrups in the worse case and have the required cover for the bottom and top bars.
thx
RE: Concrete Cover
RE: Concrete Cover
40mm
RE: Concrete Cover
RE: Concrete Cover
(1) for effective depth d> 8 in (203 mm), tolerance is -1/2 in(13 mm)
(2) at beam soffits (which does not apply in this case), tolerance is -1/4 in (about 6 mm)
(3) cover tolerance must not be gretaer than -1/3 specified cover. in your case this will be 40 mm/3 = approx 13 mm
So I guess minimum acceptable cover will be 27 mm if you go by ACI 318 requirements...almost twice the actual cover.
Just curious...was there a concrete inspector before and during concrete placement?
Is the beam fire-rated or not?