Can an artic drive on readymix after 3 days?

[RWG Contracts]

I didn't think there was much difference between RC40/45 and PAV mixes.

RC45 and PAV-2 have same cement content

 

[Lincsman]

The readymix firm will recommend If you use a RC55 mix it'll reach the same strength as a RC30 sooner, but if you drive on it on it prior to 28 days then readymix firm will still not stand by the mix of it cracks, does that make sense

I will have a look at it in 5 years time when the project ends and literally a million tonnes of truck have passed over it.

Might have been this stuff as cemex supplied it;
http://www.cemex.co.uk/promptis.aspx

40N in 48 hours.

 

[Steevo]

RC45 and PAV-2 have same cement content

What differentiates the two?

 

[Lincsman]

What differentiates the two?

RC is for where you are using steel reinforcing.

Pav is for roads etc. where it can freeze.

 

[Sunny Suffolk]

What differentiates the two?

Primarily that PAV1 or PAV2 have an air entrainment chemical put in. This causes it to have bubbles of a similar size throughout. This is what makes it superior to an RC40 / RC45 in an external yard. It protects it from freeze/thaw.

 

[RWG Contracts]

What differentiates the two?

What they said ^

 

[Steevo]

So PAV2 without air is just RC45?

 

[Sunny Suffolk]

So PAV2 without air is just RC45?

Think there are some other subtle sciencey crap differences but essentially. Imagine polystyrene without the air or an aero chocolate bar without the air haha.

 

[Steevo]

Think there are some other subtle sciencey crap differences but essentially. Imagine polystyrene without the air or an aero chocolate bar without the air haha.

Mmmmmmm.....Aero!

 

[roscoe erf]

Mmmmmmm.....Aero!

hmmmmmm

 

[Lincsman]

So PAV2 without air is just RC45?

No, its the ingredients to stop it corroding the steel.

 

[Sunny Suffolk]

No, its the ingredients to stop it corroding the steel.

That's difference between a C and an RC.

 

[Eminus]

Ok thankyou all for the help and input, we have an extra door which we will clear and let the artic's enter for the next few loads. Thanks again all

 

[Steevo]

No, its the ingredients to stop it corroding the steel.

Ah I see, never knew that!

What happens if you want to put mesh in a PAV mix? RC45 + air?!

But then surely that makes PAV - air = C45

That's difference between a C and an RC.

I never knew this either! Seen people quote C40 and assumed they were being lazy and just missed the R off the front.

 

[Lincsman]

There is more to simple concrete than just about anyone knows... hence "wet it up a bit driver" is a common phrase heard when you should have ordered something different.

 

[Steevo]

There is more to simple concrete than just about anyone knows... hence "wet it up a bit driver" is a common phrase heard when you should have ordered something different.

Or when the plant didn't send what you ordered.

I do wonder whether the plant add the required cement for your mix/slump but don't always add the full water content as more can always be added on site. I ordered a 90/100 slump a few months back, and it "stacked" when it came out the back of the lorry. To me that slump should be liquid and flow more like slurry than manure.

 

[Hesston4860s]

We poured some shed bases on Friday, a job which normally takes us a morning. But when the concrete came there was no need for the "p1ss it up abit driver" as it was like p1ss to start with !. So much so we had to wait over an hour for each load to go off abit before we could start setting bolts in as they just floated.

 

[Northeastfarmer]

So PAV2 without air is just RC45?

I believe pav2 is the same cement content as rc45 but the air bubbles in it make it the same strength as RC35

 

[RWG Contracts]

That's difference between a C and an RC.

An RC and a C are the same mix, just lazy people miss the R off

 

[Sunny Suffolk]

An RC and a C are the same mix, just lazy people miss the R off

Hmmm, not sure about that.