Labour Saving and General Guntering

Reggie.

Sami23 wrote: »

What does the 40N with FIBRE mean ?

40N is the strength of the readymix. That's silage slab strength as your average is 32 or 35N. The fibre is little bits of fibreglass that is added to the readymix that's supposed to make it bind better hence make it stronger

Sami23

Reggie. wrote: »

40N is the strength of the readymix. That's silage slab strength as your average is 32 or 35N. The fibre is little bits of fibreglass that is added to the readymix that's supposed to make it bind better hence make it stronger

Sound never heard of that fibre b4

Reggie.

Sami23 wrote: »

Sound never heard of that fibre b4

Its supposed to be better than metal mesh as it won't rust

mayota

Reggie. wrote: »

Was 7m3. 40N with fibre. €77 a metre and he charged me €500

Great value for 40n. You'd barely buy the cement for that.

Reggie.

mayota wrote: »

Great value for 40n. You'd barely buy the cement for that.

What is 40N. 40% cement

mickdw

Reggie. wrote: »

What is 40N. 40% cement

It a crushing strength. Newtons per mm Sq.
There are various mixes that can achieve this strength - varying cement content, amount of fine material and size of aggregate in the mix.

Odelay

Reggie. wrote: »

What is 40N. 40% cement

I always understood it was related to the breaking strenght, not the % of cement.

Reggie.

mickdw wrote: »

It a crushing strength. Neutons per mm Sq.
There are various mixes that can achieve

Always wondered. Just knew it was one of the strongest concretes out there

Odelay

mickdw wrote: »

It a crushing strength. Neutons per mm Sq.
There are various mixes that can achieve

Mick, ya got in before me, you have it bang on.

mickdw

Odelay wrote: »

Mick, ya got in before me, you have it bang on.

Quoted twice before I got a chance to finish and correct my spelling. Ye are on the ball.

foxy farmer

If you order 40N concrete and then tell the lorry driver to wet it into soup to make it easy to screed your finished cured concrete won't be anything close to 40N strength. There should be no water added before pouring by right as the batching plant have the different ratios worked out for the different mixes. Achieving the correct strength is an art. The slump test is an indicator of the water content and workability. The cube test is the real indicator of the final strength of a mix. This gives the final Newton strength.

mickdw

foxy farmer wrote: »

If you order 40N concrete and then tell the lorry driver to wet it into soup to make it easy to screed your finished cured concrete won't be anything close to 40N strength. There should be no water added before pouring by right as the batching plant have the different ratios worked out for the different mixes. Achieving the correct strength is an art. The slump test is an indicator of the water content and workability. The cube test is the real indicator of the final strength of a mix. This gives the final Newton strength.

You can order a 'wetter' mix if you need it easily worked but yes adding water on site is a no no.
Having said that, adding water where the job is a ground bearing slab in a farm yard is not going to be the end of the world.

foxy farmer

Reggie. wrote: »

Was 7m3. 40N with fibre. €77 a metre and he charged me €500

Is that plus VAT or a cash price?

Reggie.

foxy farmer wrote: »

If you order 40N concrete and then tell the lorry driver to wet it into soup to make it easy to screed your finished cured concrete won't be anything close to 40N strength. There should be no water added before pouring by right as the batching plant have the different ratios worked out for the different mixes. Achieving the correct strength is an art. The slump test is an indicator of the water content and workability. The cube test is the real indicator of the final strength of a mix. This gives the final Newton strength.

Even so there's no way you'd work it straight from the lorry without some water

Reggie.

foxy farmer wrote: »

Is that plus VAT or a cash price?

That was on the docket as in all in

foxy farmer

Reggie. wrote: »

That was on the docket as in all in

Bloody hell. 35N here is €78+VAT and no fibre. Conveyer belt is €10/mtr. extra.

Reggie.

foxy farmer wrote: »

Bloody hell. 35N here is €78+VAT and no fibre. Conveyer belt is €10/mtr. extra.

Pricey

td5man

foxy farmer wrote: »

Bloody hell. 35N here is €78+VAT and no fibre. Conveyer belt is €10/mtr. extra.

I was told by a certain concrete supplier that I should get 35N for €70-72+vat but he couldn't do it at it.

Reggie.

td5man wrote: »

I was told by a certain concrete supplier that I should get 35N for €70-72+vat but he couldn't do it at it.

Would he not know off a few euros for your 1000m job :P

td5man

Reggie. wrote: »

Would he not know off a few euros for your 1000m job :P

Not really interested in concrete, more money in stone.

Reggie.

td5man wrote: »

Not really interested in concrete, more money in stone.

Didn't know that.

td5man

Reggie. wrote: »

Didn't know that.

Got a good bit of concrete for houses from him over the years, only has a small batching plant with a limited amount of cement.

Mad4simmental

You can get 40n for €70 m2 cash price around here but I'm only 5 mins from the plant.

Reggie.

td5man wrote: »

Got a good bit of concrete for houses from him over the years, only has a small batching plant with a limited amount of cement.

He's not interested in the big jobs. More interested in selling the 804

darragh_haven

Reggie. wrote: »

Always wondered. Just knew it was one of the strongest concretes out there

When i was an engineer on the construction of cork airport, we were using 50N concrete for all columns and beams. Particular floor slabs were 50N too but mostly 40N and no water added. Concrete of that strenght can be worked, you just need proper concrete men.

worked with 80N concrete in tunnels in London

ganmo

darragh_haven wrote: »

you just need proper concrete men.

thats fightin talk

Reggie.

darragh_haven wrote: »

When i was an engineer on the construction of cork airport, we were using 50N concrete for all columns and beams. Particular floor slabs were 50N too but mostly 40N and no water added. Concrete of that strenght can be worked, you just need proper concrete men.

worked with 80N concrete in tunnels in London

I've no doubt it can be but pure hardship id say unless you've a way of working it. How much would it impact the strength by adding water?

mickdw

Reggie. wrote: »

I've no doubt it can be but pure hardship id say unless you've a way of working it. How much would it impact the strength by adding water?

There is a fair chance the concrete with the water added would still make the grade as the 40N mix would likely reach alittle over 40 in normal circumstances.
I would say 10 percent reduction maybe.

Nekarsulm

Reggie. wrote: »

I've no doubt it can be but pure hardship id say unless you've a way of working it. How much would it impact the strength by adding water?

Hire in an engine driven bull float. Looks like a strimmer with a float head.
Brilliant bit of kit.
(unless you're at it for the exercise!)

Reggie.

Nekarsulm wrote: »

Hire in an engine driven bull float. Looks like a strimmer with a float head.
Brilliant bit of kit.
(unless you're at it for the exercise!)

Was bolloxed after it yesterday. Getting too old for it I reckon