cdm123
Senior Member
They sprinkle steel fillings on as it setts and trowel them in to the surface, it makes it very hard to chip.
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Making concrete last as loading area.
- Thread starter Desertwheeler
- Start date
DMiller
Senior Member
Was there the day they poured those floors I could swear the concrete finishing company guys got up on the mixer and dumped bags of filings into the drums. At least 18 trucks got this treatment, never seen concrete as hard. Six bay shop poured three drive thru's while I was there.
cdm123
Senior Member
Maybe on is for surface hardening only?
Welder Dave
Senior Member
I think steel filings also help so the concrete doesn't explode when hot slag and stuff from welding and cutting lands on it.
cdm123
Senior Member
Could have been fiber mesh also, works like rebar.
repowerguy
Senior Member
- Joined
- Mar 18, 2015
- Messages
- 810
- Location
- United States southern Ohio
- Occupation
- mixer truck mechanic
Steel fiber comes in bags also, they’re about 1/8” diameter with a bend on each end. Reminds you of a welding rod stub used with a twist lock rod holder.
DMiller
Senior Member
This was back before fiber mesh became popular, late 70's. The guys that cut in our alignment pit said was the worst hardest S--t they had ever sawed. That grey color was all the way thru the slab, all 11.5 inches of the 12" slab. I still remember the bags saying IRON Filings on them. Used three bags per 8.5-9 yard load.
John Shipp
Senior Member
Steel fibre in concrete is very interesting. Had a google on it. Primarily used for crack control, one article said it is hard
to recycle, that slabs with over 50lbs of steel fibre per yard cannot be jackhammered and have to be sawn through and lifted out in sections. So will likely stand up better to a large toothed bucket?
Article also said that often they do away with the rebar or mesh as the steel fibres do a good job of crack management on there own. So less punctures too.
to recycle, that slabs with over 50lbs of steel fibre per yard cannot be jackhammered and have to be sawn through and lifted out in sections. So will likely stand up better to a large toothed bucket?
Article also said that often they do away with the rebar or mesh as the steel fibres do a good job of crack management on there own. So less punctures too.
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