Concrete barrowing rates..

[tony sayer]

Anyone got a decent idea how long it would take a couple of not terribly
fit blokes to barrow six metres of concrete from the front of a house
along a narrow side passage say 8 metres length and tip it .. laying it
out isn't that critical as such just the on-site time thats crucial!..

cheers...
--
Tony Sayer

[charles]

In article <egZ0WhND...@bancom.co.uk>,

You should get 4 cu ft in a builder's barrow. So 7 barrows to a cu yd
leading to 46 barrow loads in total.

You're talking about 6 tons

Don't try. See if you can find someone who will pump it.

--
From KT24

Using a RISC OS computer running v5.16

[Another John]

In article <egZ0WhND...@bancom.co.uk>,
tony sayer <to...@bancom.co.uk> wrote:

> Anyone got a decent idea how long it would take a couple of not terribly

> fit blokes to barrow six metres of concrete ..... laying it

> out isn't that critical as such just the on-site time thats crucial!

Surely the laying time is crucial too? I thought ready-made sets
quicker than home-made (and that therefore it'd be setting before you'd
get half-way through your SIX tons!)

John

[RobertL]

We did pretty much exactly this fairly recently. We had 7 cubic
metres and 4 of us (with 4 barrows) took, IIRC, 50 minutes to shift
it into the open trench at the back, along a little lane about 10
metres long.

With 4 people we found we were each arriving at the mixer just as the
previous bloke left. That meant we minimised the waiting time of the
mixer (they charged after the first 30 minutes).

Tips:

Set up a good one-way system so nobody has to wait at pinch points.

Work out how to access the trench at several positions so nobody has
to stop and spread out the concrete.

Make sure you know what you will do with the extra if there's too
much.


Robert

[TMC]

"charles" <cha...@charleshope.demon.co.uk> wrote in message
news:5224a966...@charleshope.demon.co.uk...

Have I got this wrong?

A standard bulders barrow is 90 litres which is a tad over 3 cubic feet not
4

a cubic metre of concrete weighs about 2400kg which is about 2.5 tons

if the OP really meant 6 cubic metres when he said 6 metres

then the total would be approx 15 tonnes not 6

on this basis most of it will have set on the front before there is any
chance of moving it

Regards

Tony

[Nightjar]

A friend of mine looked into doing much the same and concluded that the
only practical way was to get it pumped.

Colin Bignell

[charles]

In article <FcydndXvn-D4cwPT...@bt.com>,

TMC <an...@nowhere.co.uk> wrote:

> "charles" <cha...@charleshope.demon.co.uk> wrote in message
> news:5224a966...@charleshope.demon.co.uk...
> > In article <egZ0WhND...@bancom.co.uk>,
> > tony sayer <to...@bancom.co.uk> wrote:
> >
> >> Anyone got a decent idea how long it would take a couple of not terribly
> >> fit blokes to barrow six metres of concrete from the front of a house
> >> along a narrow side passage say 8 metres length and tip it .. laying it
> >> out isn't that critical as such just the on-site time thats crucial!..
> >
> >
> > You should get 4 cu ft in a builder's barrow. So 7 barrows to a cu yd
> > leading to 46 barrow loads in total.
> >
> > You're talking about 6 tons
> >
> > Don't try. See if you can find someone who will pump it.
> >

> Have I got this wrong?

> A standard bulders barrow is 90 litres which is a tad over 3 cubic feet
> not 4

Ok - I looked at Wickes web site. they said 120litres

> a cubic metre of concrete weighs about 2400kg which is about 2.5 tons

mmmm. I'm sure you are right - it's getting on for 40 years since I last
barrowed concrete. I thought a cu yd was about 1 ton, but clearly I
misremembered.

> if the OP really meant 6 cubic metres when he said 6 metres

> then the total would be approx 15 tonnes not 6

> on this basis most of it will have set on the front before there is any
> chance of moving it

> Regards

> Tony

[Andrew Mawson]

"Nightjar" wrote in message
news:Hb-dnQ8dl5H_bwPT...@giganews.com...

I would agree. 3 cu ft of concrete starts off easy to manage but rapidly
gets heavier and heavier as time progresses! I've just laid 8 cu M in a nice
easy to get at slab, 6 cuM came as ready mix, and 26 mixer loads to do the
remaining 2 cuM . You know you've done it when you've finished !

AWEM

[The Natural Philosopher]

[harry]

On Oct 19, 3:39 pm, charles <char...@charleshope.demon.co.uk> wrote:
> In article <egZ0WhND5tnOF...@bancom.co.uk>,

>    tony sayer <t...@bancom.co.uk> wrote:
>
> > Anyone got a decent idea how long it would take a couple of not terribly
> > fit blokes to barrow six metres of concrete from the front of a house
> > along a narrow side passage say 8 metres length and tip it .. laying it
> > out isn't that critical as such just the on-site time thats crucial!..
>
> You should get 4 cu ft in a builder's barrow.   So 7 barrows to a cu yd
> leading to 46 barrow loads in total.  
>
> You're talking about 6 tons
>
> Don't try.  See if you can find someone who will pump it.

More like nine tons. A cu meter of water weighs a tonne (exactly).

Get a delivery truck with a conveyor or concrete pump on board.
Even shovelling into the barrow would kill you. (And they only allow
around 20min. per drop)

[Harry Bloomfield]

tony sayer brought next idea :

As others have suggested, get it pumped into place unless you can find
lots more barrows and lots more (very fit) friends. The mix on site
concrete providers are much more amenable to helping to get the
concrete in the hole for you, might be worth discussing with them.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

[The Natural Philosopher]

charles wrote:
> In article <egZ0WhND...@bancom.co.uk>,
> tony sayer <to...@bancom.co.uk> wrote:
>
>> Anyone got a decent idea how long it would take a couple of not terribly
>> fit blokes to barrow six metres of concrete from the front of a house
>> along a narrow side passage say 8 metres length and tip it .. laying it
>> out isn't that critical as such just the on-site time thats crucial!..
>
>
> You should get 4 cu ft in a builder's barrow. So 7 barrows to a cu yd

That's bloody heavy I reckon that 150kg is all you can wheel easily and
6 cu meters is about 15 tonnes. so 100 trips?

> leading to 46 barrow loads in total.
>

Never.

> You're talking about 6 tons

No you are not. 2.5 tonnes a cu meter approx.

>
> Don't try. See if you can find someone who will pump it.
>

First correct thing you have said. I barrowed and spread 20 tonnes of
gravel..took me a month in short exhausting bursts. with days spent
relaxing and recovering in between.

I could at a pinch get 6-8 barrow loads full of wet cement out of a
tonne bag of sand

[The Natural Philosopher]

That accords with my wet finger.

[The Natural Philosopher]

harry wrote:
> On Oct 19, 3:39 pm, charles <char...@charleshope.demon.co.uk> wrote:
>> In article <egZ0WhND5tnOF...@bancom.co.uk>,
>> tony sayer <t...@bancom.co.uk> wrote:
>>
>>> Anyone got a decent idea how long it would take a couple of not terribly
>>> fit blokes to barrow six metres of concrete from the front of a house
>>> along a narrow side passage say 8 metres length and tip it .. laying it
>>> out isn't that critical as such just the on-site time thats crucial!..
>> You should get 4 cu ft in a builder's barrow. So 7 barrows to a cu yd
>> leading to 46 barrow loads in total.
>>
>> You're talking about 6 tons
>>
>> Don't try. See if you can find someone who will pump it.
>
>
>
> More like nine tons. A cu meter of water weighs a tonne (exactly).
>

wrong harry. More like 15 tonnes.

thank heavens you never had a proper job.

[dennis@home]

"tony sayer" <to...@bancom.co.uk> wrote in message
news:egZ0WhND...@bancom.co.uk...

The people that mix on site will barrow for free, I have no idea how much
they charge for the mix though.
The one guy mixed and barrowed 1.5 m2 for me in about 30 minutes.

[John Williamson]

charles wrote:
>
> mmmm. I'm sure you are right - it's getting on for 40 years since I last
> barrowed concrete. I thought a cu yd was about 1 ton, but clearly I
> misremembered.
>

Rule of thumb is a cubic yard of aggregrate is a ton. As is a cubic yard
of water. (Not exactly, but close enough for the back of an envelope.)

When you add the water and the cement to the cubic yard of aggregrate,
it still only takes up just over a cubic yard, as the water and the
cement fill the gaps between the grains, leaving them almost touching.
Then the water combines chemically with the cement. Concrete doesn't dry
by evaporation, but by a chemical reaction, losing only a small
percentage of the water to the surroundings.

--
Tciao for Now!

John.

[John Williamson]

A cubic metre of water contains a thousand litres, each of which is a
cube a tenth of a metre on a side, each of which weighs about a
kilogramme, give or take the impurities. (10^3 = 1000).

Harry's right.

Six cubic metres of *concrete* will weigh about 12 tonnes, as in 7 or 8
tonnes of aggregrate, depending on what it is, 3 tonnes or so of water
and about a tonne and a half of cement.

[dennis@home]

"John Williamson" <johnwil...@btinternet.com> wrote in message
news:9g8oi7...@mid.individual.net...

http://www.simetric.co.uk/si_materials.htm

6 m3 of concrete is about 15 tonne.

[Andy Champ]

Googling gives me densities around 2 to 2.5 tonnes per metre. So 12 to
15 tonnes for the load. (I agree with TMC)

And Charles, a Wickes barrow might be 120 litres, but you need some slop
room for concrete - you can't fill it to the rim. Nor push it far, if
it has a third of a ton in it.

Andy

[charles]

In article <vZ-dnfVYmaTrrwLT...@eclipse.net.uk>,

rue, but even at my light weight and overlarge barrow - I said 'pump it'.

[The Natural Philosopher]

John Williamson wrote:
> charles wrote:
>>
>> mmmm. I'm sure you are right - it's getting on for 40 years since I last
>> barrowed concrete. I thought a cu yd was about 1 ton, but clearly I
>> misremembered.
>>
> Rule of thumb is a cubic yard of aggregrate is a ton. As is a cubic yard
> of water. (Not exactly, but close enough for the back of an envelope.)
>

Rule of thumb is cubic yard of aggregate is about 2 tons, with spaces
for about half a ton of water. Cement doesn't add much at all.

[John Rumm]

On 19/10/2011 21:00, John Williamson wrote:

> The Natural Philosopher wrote:
>> harry wrote:
>>> On Oct 19, 3:39 pm, charles <char...@charleshope.demon.co.uk> wrote:
>>>> In article <egZ0WhND5tnOF...@bancom.co.uk>,
>>>> tony sayer <t...@bancom.co.uk> wrote:
>>>>
>>>>> Anyone got a decent idea how long it would take a couple of not
>>>>> terribly
>>>>> fit blokes to barrow six metres of concrete from the front of a house
>>>>> along a narrow side passage say 8 metres length and tip it ..
>>>>> laying it
>>>>> out isn't that critical as such just the on-site time thats crucial!..
>>>> You should get 4 cu ft in a builder's barrow. So 7 barrows to a cu yd
>>>> leading to 46 barrow loads in total. You're talking about 6 tons
>>>>
>>>> Don't try. See if you can find someone who will pump it.
>>>
>>>
>>>
>>> More like nine tons. A cu meter of water weighs a tonne (exactly).
>>>
>> wrong harry. More like 15 tonnes.
>>
> A cubic metre of water contains a thousand litres, each of which is a
> cube a tenth of a metre on a side, each of which weighs about a
> kilogramme, give or take the impurities. (10^3 = 1000).
>
> Harry's right.

Its like a bunch of kids squabbling!

Might help if someone specified what *type* of concrete, since it makes
a difference.

From http://www.pavingexpert.com/concmix1.html

"The VERY approximate quantities of materials used to generate 1m^3 of a
ST4 or C20 (1:2:4) equivalent concrete are.....

Ordinary Portland cement (OPC) - 350 kg
Fine aggregate (sand) - 700 kg
Coarse Aggregate (gravel) - 1100 kg
Water - 190 kg (190 litres)"

Which makes for 2,340kg/m^3

> Six cubic metres of *concrete* will weigh about 12 tonnes, as in 7 or 8
> tonnes of aggregrate, depending on what it is, 3 tonnes or so of water
> and about a tonne and a half of cement.

3 tonnes of water in six cube of aggregate and cement would make soup
not concrete!


--
Cheers,

John.

/=================================================================\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\=================================================================/

[RobertL]

On Oct 19, 4:10 pm, RobertL <robertml...@yahoo.com> wrote:
> On Oct 19, 3:27 pm, tony sayer <t...@bancom.co.uk> wrote:
>
>
> We did pretty much exactly this fairly recently.  We had 7 cubic
> metres and 4 of us (with 4 barrows) took, IIRC,  50 minutes to shift
> it into the open trench at the back, along a little lane about 10
> metres long.

Oops sorry, I got that wrong. We didn't have 7 cubic metres, we had
2.5 cubic metres and took 50 minutes with 4 of us.

We always had someone ready to take the next load so more people would
not have speeded it up. 7 cu.m it would take not 50 minutes but 2
hours 20 minutes. Which I guess is too long.


Robert

[charles]

In article
<be4cc103-e945-425e...@e25g2000pri.googlegroups.com>,

RobertL <rober...@yahoo.com> wrote:
> On Oct 19, 4:10 pm, RobertL <robertml...@yahoo.com> wrote:
> > On Oct 19, 3:27 pm, tony sayer <t...@bancom.co.uk> wrote:
> >
> >
> > We did pretty much exactly this fairly recently. We had 7 cubic
> > metres and 4 of us (with 4 barrows) took, IIRC, 50 minutes to shift
> > it into the open trench at the back, along a little lane about 10
> > metres long.


> Oops sorry, I got that wrong. We didn't have 7 cubic metres, we had
> 2.5 cubic metres and took 50 minutes with 4 of us.

> We always had someone ready to take the next load so more people would
> not have speeded it up.

[Snip]

more people would have allowed a short rest from time to time.

[John Rumm]

Don't think you can get 7m^3 in one lorry can you?

[dennis@home]

"RobertL" <rober...@yahoo.com> wrote in message
news:be4cc103-e945-425e...@e25g2000pri.googlegroups.com...

> We always had someone ready to take the next load so more people would
> not have speeded it up. 7 cu.m it would take not 50 minutes but 2
> hours 20 minutes. Which I guess is too long.

You can have a retardant mixed in to delay setting.
they would struggle with big builds if they couldn't control the time to
set.

[tony sayer]

In article <egZ0WhND...@bancom.co.uk>, tony sayer

<to...@bancom.co.uk> scribeth thus

>
>Anyone got a decent idea how long it would take a couple of not terribly
>fit blokes to barrow six metres of concrete from the front of a house
>along a narrow side passage say 8 metres length and tip it .. laying it
>out isn't that critical as such just the on-site time thats crucial!..
>

>cheers...

OK to all that replied..

Seems to work out 1 Cubic metre, which was what I meant;!, is for most
all applications is 2.4 tons. Some suppliers data sheets reckon that as
from 20 to 24 barrow loads per metre which it seems to me is about right
after all 1 metre sliced up is say a 20th part of that is 1000 x 500 x
100 mm cube so a \decent/ barrows worth.

Problem is it seems that from a time and motion study dun last nite it's
some 120 to 144 barrow loads for 6 metres so divide that by 2 say 60 to
72 barrow loads per man but owing to the narrow passage they have to get
down and some other factors thats going to take them 1 and a half mins
per load and 1.8 hours to do it in which is pushing the limits of time
from mix to laid will probably be best part of 2.5 hours.

Its a simple trench fill foundation so not too demanding an application
to lay, but even with three blokes there're going to get in each others
way so we're investigating other delivery methods .. enquires are on
going!.

There is a new firm on the block who have a "mix on site" up to 10 metre
machine who will deliver exactly what you want over a longer time scale
which looks promising.


Plus my back doesn't like the sound of 70 odd barrows worth!.....
--
Tony Sayer

[RobertL]

On Oct 20, 12:14 pm, John Rumm <see.my.signat...@nowhere.null> wrote:
> On 20/10/2011 08:33, RobertL wrote:
>
>
>
>
>
> > On Oct 19, 4:10 pm, RobertL<robertml...@yahoo.com>  wrote:
> >> On Oct 19, 3:27 pm, tony sayer<t...@bancom.co.uk>  wrote:
>
> >> We did pretty much exactly this fairly recently.  We had 7 cubic
> >> metres and 4 of us (with 4 barrows) took, IIRC,  50 minutes to shift
> >> it into the open trench at the back, along a little lane about 10
> >> metres long.
>
> > Oops sorry, I got that wrong.  We didn't have 7 cubic metres, we had
> > 2.5 cubic metres and took 50 minutes with 4 of us.
>
> > We always had someone ready to take the next load so more people would
> > not have speeded it up.   7 cu.m it would take not 50 minutes but 2
> > hours 20 minutes. Which I guess is too long.
>
> Don't think you can get 7m^3 in one lorry can you?

I think it's a full load of those big readymix lorries. That's where
I got the confusion from.

Robert

[The Natural Philosopher]

John Rumm wrote:
> On 20/10/2011 08:33, RobertL wrote:
>> On Oct 19, 4:10 pm, RobertL<robertml...@yahoo.com> wrote:
>>> On Oct 19, 3:27 pm, tony sayer<t...@bancom.co.uk> wrote:
>>>
>> >
>>> We did pretty much exactly this fairly recently. We had 7 cubic
>>> metres and 4 of us (with 4 barrows) took, IIRC, 50 minutes to shift
>>> it into the open trench at the back, along a little lane about 10
>>> metres long.
>>
>>
>> Oops sorry, I got that wrong. We didn't have 7 cubic metres, we had
>> 2.5 cubic metres and took 50 minutes with 4 of us.
>>
>> We always had someone ready to take the next load so more people would
>> not have speeded it up. 7 cu.m it would take not 50 minutes but 2
>> hours 20 minutes. Which I guess is too long.
>
> Don't think you can get 7m^3 in one lorry can you?
>
>

Hmm 20 tonnes odd.. certainly possible in dry form..but probably beyond
most readymix lorries.

[The Natural Philosopher]

Its a massive ask.

I cant remember how much is in my founadtions but IIRC it involved 3-5
readymixed lorries pumping when they could, and with us physically
raking and barrowing to the far ends. Never did get it level properly
either. about 5 blokes and most of the day. Very hard work.

[dennis@home]

"tony sayer" <to...@bancom.co.uk> wrote in message

news:$6AcA$SYvAo...@bancom.co.uk...

> Plus my back doesn't like the sound of 70 odd barrows worth!.....

How about 18 loads?
http://www.mixamate.co.uk/services/mini-dumper

[dennis@home]

"The Natural Philosopher" <t...@invalid.invalid> wrote in message
news:j7p3jb$f02$6...@news.albasani.net...

> I cant remember how much is in my founadtions but IIRC it involved 3-5
> readymixed lorries pumping when they could, and with us physically raking
> and barrowing to the far ends. Never did get it level properly either.
> about 5 blokes and most of the day. Very hard work.
>
>

That's the trouble with cowboy builders.. they don't have a clue..
they could have had a retardant mixed in and then they could have had all
day to level it.

[The Natural Philosopher]

Dennis, it TOOK all day to level it. we ran out of time and we ran out
of energy.

It just meant an extra days work for the brickie who laid the
foundations to true it up.

The overtime on 5 exhausted blokes would have been more expensive.

But I do accept the project manager was almost as big a wanker as you
which is why I fired him and took over the project myself after about 9
months.

[Jules Richardson]

On Thu, 20 Oct 2011 12:54:00 +0100, tony sayer wrote:
> Problem is it seems that from a time and motion study dun last nite it's
> some 120 to 144 barrow loads for 6 metres so divide that by 2 say 60 to
> 72 barrow loads per man but owing to the narrow passage they have to get
> down and some other factors thats going to take them 1 and a half mins
> per load and 1.8 hours to do it in which is pushing the limits of time
> from mix to laid will probably be best part of 2.5 hours.

Build yourself an 8m long chute - couple of guys at the front loading,
one stationed partway down keeping the flow going, couple at the other
end unloading and laying it out...

(OK, I was initially kidding, but part of me's now wondering aout slope
angles, materials costs etc. - and even if you could make it a 9m chute
and have the truck pour direct ;-)

cheers

Jules

[dennis@home]

"The Natural Philosopher" <t...@invalid.invalid> wrote in message

news:j7p4g6$hb6$2...@news.albasani.net...

> dennis@home wrote:
>>
>>
>> "The Natural Philosopher" <t...@invalid.invalid> wrote in message
>> news:j7p3jb$f02$6...@news.albasani.net...
>>
>>> I cant remember how much is in my founadtions but IIRC it involved 3-5
>>> readymixed lorries pumping when they could, and with us physically
>>> raking and barrowing to the far ends. Never did get it level properly
>>> either. about 5 blokes and most of the day. Very hard work.
>>>
>>>
>>
>> That's the trouble with cowboy builders.. they don't have a clue..
>> they could have had a retardant mixed in and then they could have had all
>> day to level it.
>
> Dennis, it TOOK all day to level it. we ran out of time and we ran out of
> energy.

Cowboys.
Concrete will virtually self level when you shove a poker into it.
You could even have just had it a bit wet so it flowed easy.

[The Natural Philosopher]

dennis@home wrote:
>
>
> "The Natural Philosopher" <t...@invalid.invalid> wrote in message
> news:j7p4g6$hb6$2...@news.albasani.net...
>> dennis@home wrote:
>>>
>>>
>>> "The Natural Philosopher" <t...@invalid.invalid> wrote in message
>>> news:j7p3jb$f02$6...@news.albasani.net...
>>>
>>>> I cant remember how much is in my founadtions but IIRC it involved
>>>> 3-5 readymixed lorries pumping when they could, and with us
>>>> physically raking and barrowing to the far ends. Never did get it
>>>> level properly either. about 5 blokes and most of the day. Very hard
>>>> work.
>>>>
>>>>
>>>
>>> That's the trouble with cowboy builders.. they don't have a clue..
>>> they could have had a retardant mixed in and then they could have had
>>> all day to level it.
>>
>> Dennis, it TOOK all day to level it. we ran out of time and we ran out
>> of energy.
>
> Cowboys.
> Concrete will virtually self level when you shove a poker into it.
> You could even have just had it a bit wet so it flowed easy.
>
>
>

Once again you show your total ignorance. We DID all that but it was
still out by about 4" over 30 meters.

[dennis@home]

"The Natural Philosopher" <t...@invalid.invalid> wrote in message

news:j7p78h$n1m$1...@news.albasani.net...

> Once again you show your total ignorance. We DID all that but it was still
> out by about 4" over 30 meters.

So do it properly then!
You amaze me.. you come here and post how you did it wrong and then tell me
I am the ignorant one.

[Roger Chapman]

On 19/10/2011 21:39, The Natural Philosopher wrote:
> John Williamson wrote:
>> charles wrote:
>>>
>>> mmmm. I'm sure you are right - it's getting on for 40 years since I last
>>> barrowed concrete. I thought a cu yd was about 1 ton, but clearly I
>>> misremembered.
>>>
>> Rule of thumb is a cubic yard of aggregrate is a ton. As is a cubic
>> yard of water. (Not exactly, but close enough for the back of an
>> envelope.)
>>
>
> Rule of thumb is cubic yard of aggregate is about 2 tons, with spaces
> for about half a ton of water. Cement doesn't add much at all.

My ever useful Architects and Builders Diary for 1956 has a table for
"Materials per cubic yd of concrete".

For 1:2:3 mix (or 1:4.25 all in Mix) the information is as follows:

Tons (c. yds) gals.
Cement Sand Gravel All in Water

.271 (.249) .601 (.499) .794 (.748) 1.395 (1.033) 30.9

So the all in aggregate is 1.35 tons to the cubic yard which is a good
bit more than 1 ton but still closer than 2 tons. Gravel on its own at
1.06 is almost spot on.

TNP is well off on the water as well. 30.9 gallons is little more (29lb)
than a quarter of a ton although it has to be said that concrete with
the minimum amount of water tends to be very stiff and not easily laid.

>> When you add the water and the cement to the cubic yard of aggregrate,
>> it still only takes up just over a cubic yard, as the water and the
>> cement fill the gaps between the grains, leaving them almost touching.
>> Then the water combines chemically with the cement. Concrete doesn't
>> dry by evaporation, but by a chemical reaction, losing only a small
>> percentage of the water to the surroundings.
>>

Unless you add excess water. And, according to the information above,
you actually get a slight shrinkage.

--
Roger Chapman

[John Rumm]

I thought most readymix ones were 6m^3 full load...

Don't know what those big mix on site ones can do though.

[tony sayer]

>> Don't think you can get 7m^3 in one lorry can you?
>>
>>
>Hmm 20 tonnes odd.. certainly possible in dry form..but probably beyond
>most readymix lorries.

These new kids on the block around here can do up to 8 metres and it
sure is freshly mixed;).

Saw one in operation the other week and very impressive it was too
needed just over the 6 mark and was charged for 6.2 which is what we
used..


To some extent they can vary the mix as required which may be useful in
some instances..

http://www.cardinalis.co.uk/index.htm
--
Tony Sayer

[tony sayer]

In article <4ea0126b$0$11249$c3e8da3$fb48...@news.astraweb.com>,
dennis@home <den...@killspam.kickass.net> scribeth thus

Yes except that are rather expensive for the concrete that is around 878
odd for 6 metres but does include the dumper...
--
Tony Sayer

[tony sayer]

In article <j7p5gq$j5i$4...@dont-email.me>, Jules Richardson <jules.richard
sonne...@gmail.com> scribeth thus

Have already looked into that, as well as pumping some 445 plus VAT,
but a bit impractical for the angle of where its to start from to where
it will end up.

Looks like I might have found the right sort of tracked dumper that can
carry around 6 cubic feet in one go at a reasonable rate of hire..
--
Tony Sayer

[The Natural Philosopher]

Sound about right as a solution.

[fred]

In article <wu3f1KVF...@bancom.co.uk>, tony sayer
<to...@bancom.co.uk> writes

I've helped out spreading 4m3 mixed on site using an 8 cube mixing
truck. The truck looked more like a tanker than a tipper and used a
sealed auger at the back to mix on demand.

There were 2 men with the truck and they barrowed the lot about 10m to
where we were levelling out on a mixed bag of strip found and massed
concrete. The massed concrete was mixed slightly weaker.

They used oversize barrows and made it look effortless but they did
insist that a path was laid with scaffold boards (just single file) to
keep the rolling resistance down. We struggled to keep up with them.

I can't say I remember the exact time they spent on site but I'm pretty
sure it was less than an hour.

At the time (5 or 6 years ago?) I think it might have been 120quid a
cube for site mix vs 90quid for readymix. If you can find an outfit
doing that sort of deal then it might be a cost effective option.

These guys were good but bear in mind that one here has reported an
absolute disaster from a site mix outfit doing a shed/garage base
although I don't think it was done on a large scale sealed auger mixer.
--
fred
FIVE TV's superbright logo - not the DOG's, it's bollocks

[Rick Hughes]

"The Natural Philosopher" <t...@invalid.invalid> wrote in message

news:j7ncht$mk4$9...@news.albasani.net...

> John Williamson wrote:
>> charles wrote:
>>>
>>> mmmm. I'm sure you are right - it's getting on for 40 years since I last
>>> barrowed concrete. I thought a cu yd was about 1 ton, but clearly I
>>> misremembered.
>>>
>> Rule of thumb is a cubic yard of aggregrate is a ton. As is a cubic yard
>> of water. (Not exactly, but close enough for the back of an envelope.)
>>
>
> Rule of thumb is cubic yard of aggregate is about 2 tons, with spaces for
> about half a ton of water. Cement doesn't add much at all.
>

That is about right ... if you are having Readymix ... you won't barrow it
fast enough unless you have a lot of guys and barrows.

Options ...
get minimix and have it in 2 loads
Specify retarder in mix to give you time to shift it.
Have it pumped ...
Have it delivered on conveyor mixer if that would get it where you need it
.... but total volume is then down as truck has to reduce load due to
conveyor weight
Get motorised barrow ... these take much more than standard barrow
Use a dumper
Get mixamate or whatever local name is ... guy mixes it on back of truck and
you barrow it

[Andy Champ]

On 20/10/2011 17:18, Roger Chapman wrote:
>
> My ever useful Architects and Builders Diary for 1956 has a table for
> "Materials per cubic yd of concrete".
>
> For 1:2:3 mix (or 1:4.25 all in Mix) the information is as follows:
>
> Tons (c. yds) gals.
> Cement Sand Gravel All in Water
>
> .271 (.249) .601 (.499) .794 (.748) 1.395 (1.033) 30.9
>

A cubic yard is only about 90cm on a side. So only about 3/4 of a cubic
metre.

Andy

[ARWadsworth]

tony sayer wrote:
> Anyone got a decent idea how long it would take a couple of not
> terribly fit blokes to barrow six metres of concrete from the front
> of a house along a narrow side passage say 8 metres length and tip it
> .. laying it out isn't that critical as such just the on-site time
> thats crucial!..
>
> cheers...

Well this is 2 cubic metres

http://www.youtube.com/watch?v=Ea8XA5fuxoA

that was fucked up in 3 hours:-)


--
Adam

[Roger Chapman]

Close enough for a back of an envelope calculation ;-) but slightly more
accurate would be to multiply yards^3 by 1.3 to get metres^3.

But I was following up the earlier remark repeated below, hence yards.

"Rule of thumb is a cubic yard of aggregrate is a ton. As is a cubic
yard of water. (Not exactly, but close enough for the back of an
envelope.)"

Incidentally it is the cubic metre rather than the yard that
approximates to a ton, ton and tonne being very similar amounts. 2240
and 2205 in lbs.

--
Roger Chapman

[tony sayer]

In article <DdmdnXAFRaRy7D3T...@bt.com>, Rick Hughes
<rick_hughes@remove_me_btconnect.com> scribeth thus

>
>"The Natural Philosopher" <t...@invalid.invalid> wrote in message
>news:j7ncht$mk4$9...@news.albasani.net...
>> John Williamson wrote:
>>> charles wrote:
>>>>
>>>> mmmm. I'm sure you are right - it's getting on for 40 years since I last
>>>> barrowed concrete. I thought a cu yd was about 1 ton, but clearly I
>>>> misremembered.
>>>>
>>> Rule of thumb is a cubic yard of aggregrate is a ton. As is a cubic yard
>>> of water. (Not exactly, but close enough for the back of an envelope.)
>>>
>>
>> Rule of thumb is cubic yard of aggregate is about 2 tons, with spaces for
>> about half a ton of water. Cement doesn't add much at all.
>>
>
>
>That is about right ... if you are having Readymix ... you won't barrow it
>fast enough unless you have a lot of guys and barrows.
>
>Options ...
>get minimix and have it in 2 loads

Well could do but don't like the idea of "joining" it..

>Specify retarder in mix to give you time to shift it.

Possible..

>Have it pumped ...

Bl^^dy expensive here 445 plus VAT quid's..

>Have it delivered on conveyor mixer if that would get it where you need it
>.... but total volume is then down as truck has to reduce load due to
>conveyor weight

No one has anything like that in the area..

>Get motorised barrow ... these take much more than standard barrow

Looks like thats what we are going to do..

>Use a dumper
>Get mixamate or whatever local name is ... guy mixes it on back of truck and
>you barrow it

No one seems to want to do that here..
>
>
>
>

--
Tony Sayer

[tony sayer]

>> Have already looked into that, as well as pumping some 445 plus VAT,
>> but a bit impractical for the angle of where its to start from to where
>> it will end up.
>>
>> Looks like I might have found the right sort of tracked dumper that can
>> carry around 6 cubic feet in one go at a reasonable rate of hire..
>
>Sound about right as a solution.
>

Yes, my back likes the idea;)..
--
Tony Sayer

[tony sayer]

In article <j7q1i3$g2e$1...@dont-email.me>, ARWadsworth <adamwadsworth@blue
yonder.co.uk> scribeth thus

I was expecting them to sod off down the pub for a while;!..

So have we a pix of the finished lay?..
--
Tony Sayer