Tyresö
Jan-Å said:
>Tyresö
You should damn well write a book ;)d^_^b though you've almost done that already by just compiling your posts on the forum :P
Thank you so much, I bow and scrape!

Many of my returning customers often say on the phone when they order concrete pumping from me: "Hahaha, and when you come out to the site, you could try pumping out the concrete, instead of talking it out..."

Glad to make someone happy...
 
Tyresö said:
In the 70s, they didn't mix concrete with hot water in winter - then a bright mind came up with a real stroke of genius - they mixed in salt instead so that the salt would bind the liquid and start the curing process.

That bright mind in the 70s has caused the whole of Stockholm to be falling apart because the reinforcing steel has rusted away!!! You get anxious when you see how many gouged-out balconies have had rusted reinforcing steel in the past 15 years - and all the parking garages....It could be several floors in free fall...
It’s called foresight. You underestimate an industry that was already working on future-proofing their workplaces in the 70s. :P Now it is constantly in high demand in the construction industry. It's worth taking the opportunity to highlight the guys behind the single-stage method. They certainly deserve credit.
 
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Tyresö
"Isolde"

Hahaha, yes, I personally think it's wonderful - lots of work for me. The most fun was when I pumped concrete for floors and foundations for a gondola-like ride on the outside of the Globen.

One of the concrete workers there had been involved in building the Globen itself. He got blamed for all the shoddy construction they encountered during the renovation. But he just laughed and said just like you - "Be glad that I had foresight for you." As soon as someone saw a super nice polished concrete floor, he would, of course, say that he was the one who polished it (who else...hehe?). The Globen job last year was really fun.
 
Milkshaken
I don't know anyone who is as "passionate" about their job as Tyresö.... :)
Seems like a concrete decision he made when he chose to start a concrete pumping company.. :)
 
Tyresö
"Milkshaken"

Hahaha, both I and the concrete are burning.....
 
we are thinking of pouring a garage slab this coming week. The foundation guys missed covering the form properly, so some snow has blown in between the tarp and the Styrofoam.

So how do we get rid of the snow? Would it work to sprinkle some salt and brush away the slush? The reinforcement shouldn't have salt on it when pouring.

The alternative might be to build a little tent with Styrofoam and tarps and heat it up so the snow melts?
 
Absolutely no salt!! The concrete can't handle it. The best thing is to try to heat it away. Form and reinforcement should maintain +5 degrees before pouring the concrete.
 
The casting went well.

We laid out polystyrene + tarp on top of the reinforcement and set up two heaters to trap warm air in the space between. We sealed it properly with leftover insulation and some foam. It was 10 degrees there in the early morning. Then we removed it when the concrete truck arrived. The casting guys said it was well prepared.

So everything went very smoothly and now we have a nice garage foundation.

Thanks Matti_75 for your quick response when we were looking for a solution!
 
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Glad it went well. Fun to be able to help.
 
I have a question on the subject so I'm reviving an old thread:

The slab is ready, and we're just waiting for the right weather to pour in the Kalmar area. Unfortunately, we got some snow a while ago, and since then it's been around 0, so the snow hasn't really melted. It's about a couple of centimeters of snow. But there's some more snow mixed with rain expected this weekend, although it might just turn to rain.

How do I remove the snow from the slab? Most of it is on the edge beam. I'm considering laying out a tarp and placing a heater underneath.
The problem is that the slab is 270m2 and about 95m in circumference, so I have to do it in stages.

I've hired an experienced concrete worker for reinforcement+pouring, but the snow needs to be removed...
 
M mackan_kal said:
I have a question on the topic so I'm reviving an old thread:

The slab is ready and we're just waiting for weather to cast in the Kalmar area. Unfortunately, we got some snow a while ago and since then it's been around 0, so the snow doesn't really melt. It's about a few cm of snow. But there will be some mixed snow coming this weekend, though it might just as well be rain.

How do I get the snow off the slab? Most of it is out on the edge beam. I'm thinking about laying out tarps and placing a heater underneath.
The problem is that the slab is 270m2 and about 95m in circumference, so I have to do it in stages.

I have hired an experienced Concreter for reinforcement + casting, but the snow has to go...
Tarps and a heater like you're thinking. A tip is to rent a larger compressor and blow most of it away first.
Then if there's a little snow left it will melt quickly when the concrete is poured. But a few cm over the whole surface is quite a bit...
 
If the snow hasn't become compact yet, a leaf blower works excellently. It's used on construction sites here in Norrbotten, as you often have to start the workday by removing snow...

However, if it is completely compact and icy, only heat will help, and for such a large slab as in your case, you'll need to divide the work over a few days and areas.
 
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