Road Plainings under concrete? Bad news or a myth?

[frustratedfarmer]

some have said a chemical reaction starts if you poor straight on top which is bad news long term.

Others aren't bothered by it.

Any views here? It's great stuff to get level and firm but don't want long term headaches!?

TYIA

 

[Lincs Lass]

Dont do it ,,you,ll get a nasty smell as it reacts ,,knew somebody that put it under a garage floor and building regs made him tear it up and start again with type 1

 

[BAC]

Dont do it ,,you,ll get a nasty smell as it reacts ,,knew somebody that put it under a garage floor and building regs made him tear it up and start again with type 1

Was the garage connected to the house??

 

[Lincs Lass]

Was the garage connected to the house??

Yes

 

[BAC]

Yes

That's why, the fumes have the potential to leak into the house. Had the same with contaminated spoil

 

[frustratedfarmer]

But under a farm road?

 

[Lincs Lass]

Wouldnt like to say ,might still react but the smell would dissapeer

 

[S J H]

Just use a DPM

 

[RWG Contracts]

Use dpm, although I was told that they take about 150 years before it affects your concrete. We just use MOT it's just as easy to level

 

[frustratedfarmer]

Yeah but we get ours very cheap!

DPM it is then

 

[Courier]

Planings provide a flexible surface which is not always good to be overlaid with rigid concrete ?

 

[RWG Contracts]

Planings provide a flexible surface which is not always good to be overlaid with rigid concrete ?

By the time they've been rolled a time or ten they're solid

 

[frustratedfarmer]

We put it down 3-4 inches thick, roll it and let it sit for a bit then roll it some more.

It goes over a foot of hard core. We will put 6-7 inches of C45 concrete with mesh in, should do the job and see me out?

 

[Courier]

By the time they've been rolled a time or ten they're solid

Woulkd need to be a substantial cost saving IMHO.

Certainly wouldn't like to use them on someone elses property and give a 20 year warranty on the concrete

 

[RWG Contracts]

Woulkd need to be a substantial cost saving IMHO.

Certainly wouldn't like to use them on someone elses property and give a 20 year warranty on the concrete

I don't use them

 

[frustratedfarmer]

What does Mot cost a ton?

 

[RWG Contracts]

What does Mot cost a ton?

I'm on £12 a tonne I think

 

[spikeislander]

If you had planings under your concrete floor do you think the smell will have stopped after 20 years under Neath?

 

[How much]

Can't see why it would matter , concrete is regularly laid under tar either on road crossings or even as part of motorway construction i have never seen a barrier layer used with it , why would doing it the other way around make any differnace ?
The only real differance is the tar is in chip form as opposed to solid , in practice road planings can become at least as solid as type one although unlike type one its just come off a planer so is not as consistant as crushed stone so does not have type appoval and so in a building regs situation would not be acceptable.

If you had an option of say road plainings or dolimitic lime stone type one , the planings would in the longer term be better you would think , as dolimite softens with water, planeings being coated with tar will not suffer that long term water errosion.

 

[bobk]

I'm on £12 a tonne I think

What is it ?