Pumping Fiber Reinforced Concrete
Pumping Fiber Reinforced Concrete
(OP)
A structure we did requires 120 lbs. steel fiber reinforcing per cubic yard of concrete. The concrete has to be pumped, but the contractor tried one section and said the fibers were clumping up and was not able to be effectively pumped. He is using the largest pump hose he can get. Any suggestions to what could be done to get this to work?






RE: Pumping Fiber Reinforced Concrete
different style of steel fiber
different size or size mix of steel fiber
fiberglass (or some other material) fiber
find a different way to transport the steel fiber to the final location
bigger pump
different style of pump
Probably your best bet is to contact the manufacturer of the steel fibers.
RE: Pumping Fiber Reinforced Concrete
RE: Pumping Fiber Reinforced Concrete
Steel fibres have caused lots of problems on many jobs and many court cases are now on foot. I would stay with conventional reinforced concret.
RE: Pumping Fiber Reinforced Concrete
I have used steel fibres in concrete on numerous occasions, but it was never placed by pumping. If it can be done, the supplier should be able to tell you how.
RE: Pumping Fiber Reinforced Concrete
We did have trial mixes and placements too.
One lesson we learned was to use plasticizer.
Regards,
![[pipe] pipe](https://www.tipmaster.com/images/pipe.gif)
Qshake
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RE: Pumping Fiber Reinforced Concrete
RE: Pumping Fiber Reinforced Concrete
Mixing time (too long or too short) can be critical. Pumping just complicates it, especially is it is lightweight or is pumped high.
RE: Pumping Fiber Reinforced Concrete