Making concreting easier

anyone had a similar problem to this:

ordered 16 cube + make up load

1st 8 cube came was supposed to be 120 slump and by the time we got to unloading the last dumper load (couldn't get wagon in due to skidding) it wouldn't even flow down the shoot, after we had him put his tank of water in to help it flow. we laid 3.5 cube the rest was just solid tracked a mini digger on it at 6" thick and only put tread marks in it only 1hr after putting last bit down.

this morning the 3.5 cube we laid is very dark as appose to nearly white like new conc and you can still mark it with finger nail.

it was supposed to be rc 40 with fibres in

What slump was it when it came?
 

Alf

Member
Location
Scotland
IMG_9375.jpg
!
 

Pan mixer

Member
Mixed Farmer
Location
Near Colchester
I ordered 120 slump, it was wetter I think but we took it anyway.

IMG02726.jpg

This was directly out of the chute with minimal raking into the corners, there is 200 mm fall on 80 feet there and it was a job to screed as it wanted to go downhill big style.

Load delivered at 9:00 am, just managed to get it flat enough to bull float by 1:00 pm

IMG02728.jpg

It took until 5:pm to get it dry enough to 'not-stick-to-the-back-of-your-hand' i.e. ready for printing with the roller-bug

IMG02734.jpg


I wish that it had been a little less wet., nice dry day but overcast, site has plenty of air, I am really surprised and annoyed at how long it took to go off.

Must stick to the pan-mixer in the future.
 
I ordered 120 slump, it was wetter I think but we took it anyway.

View attachment 584630
This was directly out of the chute with minimal raking into the corners, there is 200 mm fall on 80 feet there and it was a job to screed as it wanted to go downhill big style.

Load delivered at 9:00 am, just managed to get it flat enough to bull float by 1:00 pm

View attachment 584634
It took until 5:pm to get it dry enough to 'not-stick-to-the-back-of-your-hand' i.e. ready for printing with the roller-bug

View attachment 584638

I wish that it had been a little less wet., nice dry day but overcast, site has plenty of air, I am really surprised and annoyed at how long it took to go off.

Must stick to the pan-mixer in the future.

100-120 is what we use when it’s a flat floor. It’ll go off slower than your pan mixer cause of the retarders in it
 
I ordered 120 slump, it was wetter I think but we took it anyway.

View attachment 584630
This was directly out of the chute with minimal raking into the corners, there is 200 mm fall on 80 feet there and it was a job to screed as it wanted to go downhill big style.

Load delivered at 9:00 am, just managed to get it flat enough to bull float by 1:00 pm

View attachment 584634
It took until 5m to get it dry enough to 'not-stick-to-the-back-of-your-hand' i.e. ready for printing with the roller-bug

View attachment 584638

I wish that it had been a little less wet., nice dry day but overcast, site has plenty of air, I am really surprised and annoyed at how long it took to go off.

Must stick to the pan-mixer in the future.

Look at all that waste at this end of the last pic :eek::ROFLMAO::)

Id have had that up to fill a hole elsewhere :p
 

dannewhouse

Member
Location
huddersfield
What slump was it when it came?
we didn't check as tbh don't have the cone test or the cubes to do proper tests (I know cube is a strength test) but normally from a proper company its near enough correct. it altered from the 1st dumper full to the last any way company have agreed to pay to rip out the bit we had laid and start the job again, good job as it took 1 man an afternoon with a compressor and breaker to do it 1pm till about 5, we would have used breaker on machine but he had it done before we got there, next sat its round 2. the conc was very easy to break out and the top "fat" was extremely weak a trolley jack would have made a mess.

the conc company offered to give a guarantee on it but we said preffered it out.
 
we didn't check as tbh don't have the cone test or the cubes to do proper tests (I know cube is a strength test) but normally from a proper company its near enough correct. it altered from the 1st dumper full to the last any way company have agreed to pay to rip out the bit we had laid and start the job again, good job as it took 1 man an afternoon with a compressor and breaker to do it 1pm till about 5, we would have used breaker on machine but he had it done before we got there, next sat its round 2. the conc was very easy to break out and the top "fat" was extremely weak a trolley jack would have made a mess.

the conc company offered to give a guarantee on it but we said preffered it out.

I meant what slump did you think it was when it came, rough guess.

Slump will change over the load if you’re taking it with a dumper side it’s drying in the drum.

At least concrete firm stood by it, that’s all that matters. I’m in an argument with a big concrete firm at the min cause half way through a big pour they sent the wrong mix, I signed the ticket and driver left. I only realised we’d got a load wrong when the floor wasn’t right two month later. Concrete firm won’t stand by it cause I signed ticket. How many people check the ticket before they discharge a load??
 

dannewhouse

Member
Location
huddersfield
I meant what slump did you think it was when it came, rough guess.

Slump will change over the load if you’re taking it with a dumper side it’s drying in the drum.

At least concrete firm stood by it, that’s all that matters. I’m in an argument with a big concrete firm at the min cause half way through a big pour they sent the wrong mix, I signed the ticket and driver left. I only realised we’d got a load wrong when the floor wasn’t right two month later. Concrete firm won’t stand by it cause I signed ticket. How many people check the ticket before they discharge a load??

I would guess at like 60 (even less before we added his tank of water) had some 80 slump for bolt boxes the day before not a problem. they suspect the plasticiser never went into the mixer. we only check ticket after unloading. we had a similar situation on a foundry job randomly an 8m load in the middle of like a 100cube pour was pink and wouldn't turn. a different ready-mix was blaming us until a lab found sand and salt had been mixed in the load suspected that it had stuck in the body of an artic who fetched them sand after and it came out. they took some persuading that they were footing the bill!!!
 

Steevo

Member
Location
Gloucestershire
I meant what slump did you think it was when it came, rough guess.

Slump will change over the load if you’re taking it with a dumper side it’s drying in the drum.

At least concrete firm stood by it, that’s all that matters. I’m in an argument with a big concrete firm at the min cause half way through a big pour they sent the wrong mix, I signed the ticket and driver left. I only realised we’d got a load wrong when the floor wasn’t right two month later. Concrete firm won’t stand by it cause I signed ticket. How many people check the ticket before they discharge a load??

Whilst I can see their attempt at an argument...

I would think the concrete firm would have a duty of care to send the right mix.
You ordered RC40 or such, they broke the contract by not supplying the product ordered, whether you signed the ticket or not.
If all previous 10 loads had been the right mix, I'm not sure you should need to be responsible for making sure the 11th was still the same product you ordered.

Furthermore....you noticed the mistake....albeit later....but you still spotted it and raised it. Either they didn't spot it....or worse they did and didn't raise it. Neither looks good.

Good luck!
 

dannewhouse

Member
Location
huddersfield
Whilst I can see their attempt at an argument...

I would think the concrete firm would have a duty of care to send the right mix.
You ordered RC40 or such, they broke the contract by not supplying the product ordered, whether you signed the ticket or not.
If all previous 10 loads had been the right mix, I'm not sure you should need to be responsible for making sure the 11th was still the same product you ordered.

Furthermore....you noticed the mistake....albeit later....but you still spotted it and raised it. Either they didn't spot it....or worse they did and didn't raise it. Neither looks good.

Good luck!

you could have saved a "catastrophic failure" if the conc had been under required strength and used in say a rc beam? I know yours isn't but you've to lay it on thick
 

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