Its that time of year again when operating the multi fuel stove banked
up with an anthracite based briquette product means there is some Ash
to be disposed of. Wood ash is no problem as it can be used in the
garden but I am reluctant to dispose of coal ash in this way though I
believe it may have been used by some in the past so it get bagged up
and taken to the dump or sometimes put in a bag in the non recyclable
bin which often means double handling as it is too hot for plastic
bags.

Next spring we will need to replace some border edging so killing two
birds with one stone I'm thinking of getting one of those moulds
designed for use with cement to cast some edging and use the ash as a
constituent in place of the some of the cement or sand and cast some
edges over the winter as and when I feel like it.
Anybody have any suggestion as to what ratios would make a reasonably
robust mix.

G.Harman

On 16/11/2017 09:43, wrote:

Its that time of year again when operating the multi fuel stove banked
up with an anthracite based briquette product means there is some Ash
to be disposed of. Wood ash is no problem as it can be used in the
garden but I am reluctant to dispose of coal ash in this way though I
believe it may have been used by some in the past so it get bagged up
and taken to the dump or sometimes put in a bag in the non recyclable
bin which often means double handling as it is too hot for plastic
bags.

You could use it to dress a cinder path if you need another footpath and
don't want it concrete or asphalt.

--
Max Demian

On 16/11/17 09:43, wrote:


Its that time of year again when operating the multi fuel stove banked
up with an anthracite based briquette product means there is some Ash
to be disposed of. Wood ash is no problem as it can be used in the
garden but I am reluctant to dispose of coal ash in this way though I
believe it may have been used by some in the past so it get bagged up
and taken to the dump or sometimes put in a bag in the non recyclable
bin which often means double handling as it is too hot for plastic
bags.

Next spring we will need to replace some border edging so killing two
birds with one stone I'm thinking of getting one of those moulds
designed for use with cement to cast some edging and use the ash as a
constituent in place of the some of the cement or sand and cast some
edges over the winter as and when I feel like it.
Anybody have any suggestion as to what ratios would make a reasonably
robust mix.

G.Harman

According to wiki it is in itself a sort of cement, so I'd mix it 30:70
with cement and use normal 2:1 style mixes.


--
Theres a mighty big difference between good, sound reasons and reasons
that sound good.

Burton Hillis (William Vaughn, American columnist)

In article ,
The Natural Philosopher wrote:
On 16/11/17 09:43, wrote:


Its that time of year again when operating the multi fuel stove banked
up with an anthracite based briquette product means there is some Ash
to be disposed of. Wood ash is no problem as it can be used in the
garden but I am reluctant to dispose of coal ash in this way though I
believe it may have been used by some in the past so it get bagged up
and taken to the dump or sometimes put in a bag in the non recyclable
bin which often means double handling as it is too hot for plastic
bags.

Next spring we will need to replace some border edging so killing two
birds with one stone I'm thinking of getting one of those moulds
designed for use with cement to cast some edging and use the ash as a
constituent in place of the some of the cement or sand and cast some
edges over the winter as and when I feel like it.
Anybody have any suggestion as to what ratios would make a reasonably
robust mix.

G.Harman

According to wiki it is in itself a sort of cement, so I'd mix it 30:70
with cement and use normal 2:1 style mixes.

on visiting a mediaeval house in Cheshire, we saw what looked like a cement
floor. Apparently made of coal ash & cowdung.

--
from KT24 in Surrey, England

On Thursday, 16 November 2017 11:24:30 UTC, The Natural Philosopher wrote:
On 16/11/17 09:43, wrote:


Its that time of year again when operating the multi fuel stove banked
up with an anthracite based briquette product means there is some Ash
to be disposed of. Wood ash is no problem as it can be used in the
garden but I am reluctant to dispose of coal ash in this way though I
believe it may have been used by some in the past so it get bagged up
and taken to the dump or sometimes put in a bag in the non recyclable
bin which often means double handling as it is too hot for plastic
bags.

Next spring we will need to replace some border edging so killing two
birds with one stone I'm thinking of getting one of those moulds
designed for use with cement to cast some edging and use the ash as a
constituent in place of the some of the cement or sand and cast some
edges over the winter as and when I feel like it.
Anybody have any suggestion as to what ratios would make a reasonably
robust mix.

G.Harman

According to wiki it is in itself a sort of cement,

I can't find anywhere it says that

so I'd mix it 30:70
with cement and use normal 2:1 style mixes.

nor anywhere that recommends that. I dare say it would work, but there are possibly more optimal mixes.


NT

On 16/11/17 12:55, wrote:
On Thursday, 16 November 2017 11:24:30 UTC, The Natural Philosopher wrote:
On 16/11/17 09:43, wrote:


Its that time of year again when operating the multi fuel stove banked
up with an anthracite based briquette product means there is some Ash
to be disposed of. Wood ash is no problem as it can be used in the
garden but I am reluctant to dispose of coal ash in this way though I
believe it may have been used by some in the past so it get bagged up
and taken to the dump or sometimes put in a bag in the non recyclable
bin which often means double handling as it is too hot for plastic
bags.

Next spring we will need to replace some border edging so killing two
birds with one stone I'm thinking of getting one of those moulds
designed for use with cement to cast some edging and use the ash as a
constituent in place of the some of the cement or sand and cast some
edges over the winter as and when I feel like it.
Anybody have any suggestion as to what ratios would make a reasonably
robust mix.

G.Harman

According to wiki it is in itself a sort of cement,

I can't find anywhere it says that

so I'd mix it 30:70
with cement and use normal 2:1 style mixes.

nor anywhere that recommends that. I dare say it would work, but there are possibly more optimal mixes.


Try looking a bit harder mate.


NT



--
I would rather have questions that cannot be answered...
....than to have answers that cannot be questioned

Richard Feynman

On Thu, 16 Nov 2017 04:55:36 -0800, tabbypurr wrote:

On Thursday, 16 November 2017 11:24:30 UTC, The Natural Philosopher
wrote:
On 16/11/17 09:43, wrote:


Its that time of year again when operating the multi fuel stove
banked up with an anthracite based briquette product means there is
some Ash to be disposed of. Wood ash is no problem as it can be used
in the garden but I am reluctant to dispose of coal ash in this way
though I believe it may have been used by some in the past so it get
bagged up and taken to the dump or sometimes put in a bag in the non
recyclable bin which often means double handling as it is too hot for
plastic bags.

Next spring we will need to replace some border edging so killing two
birds with one stone I'm thinking of getting one of those moulds
designed for use with cement to cast some edging and use the ash as
a constituent in place of the some of the cement or sand and cast
some edges over the winter as and when I feel like it.
Anybody have any suggestion as to what ratios would make a reasonably
robust mix.

G.Harman

According to wiki it is in itself a sort of cement,

I can't find anywhere it says that

so I'd mix it 30:70 with cement and use normal 2:1 style mixes.

nor anywhere that recommends that. I dare say it would work, but there
are possibly more optimal mixes.

When the old railway tunnel under my PPoE collapsed (partially) they
pumped it full of a cement filler made partly from ash from the local
power station. Presumably it's nice and liquid and can be pumped well.

--
My posts are my copyright and if @diy_forums or Home Owners' Hub
wish to copy them they can pay me £1 a message.
Use the BIG mirror service in the UK: http://www.mirrorservice.org
*lightning surge protection* - a w_tom conductor

Chris Hogg wrote:

tabbypurr wrote:

The Natural Philosopher wrote:

According to wiki it is in itself a sort of cement,

I can't find anywhere it says that

You haven't looked very hard! Like I said in my reply to the OP, it's
pozzolanic. See the Wiki link.

Isn't a pozzolan something that helps a cement to set/bind, rather than
being a cement itself?

On 16/11/17 14:16, Andy Burns wrote:
Chris Hogg wrote:

tabbypurr wrote:

The Natural Philosopher wrote:

According to wiki it is in itself a sort of cement,

I can't find anywhere it says that

You haven't looked very hard! Like I said in my reply to the OP, it's
pozzolanic. See the Wiki link.

Isn't a pozzolan something that helps a cement to set/bind, rather than
being a cement itself?


There is calcium oxide in ash. And sulphurs

That sets into calcium carbonate and sulphate eventually.

But even without that, pozzolans reduce the amount of cement needed.


--
Climate Change: Socialism wearing a lab coat.

On Thursday, 16 November 2017 12:55:38 UTC, wrote:
On Thursday, 16 November 2017 11:24:30 UTC, The Natural Philosopher wrote:
On 16/11/17 09:43, wrote:


Its that time of year again when operating the multi fuel stove banked
up with an anthracite based briquette product means there is some Ash
to be disposed of. Wood ash is no problem as it can be used in the
garden but I am reluctant to dispose of coal ash in this way though I
believe it may have been used by some in the past so it get bagged up
and taken to the dump or sometimes put in a bag in the non recyclable
bin which often means double handling as it is too hot for plastic
bags.

Next spring we will need to replace some border edging so killing two
birds with one stone I'm thinking of getting one of those moulds
designed for use with cement to cast some edging and use the ash as a
constituent in place of the some of the cement or sand and cast some
edges over the winter as and when I feel like it.
Anybody have any suggestion as to what ratios would make a reasonably
robust mix.

G.Harman

According to wiki it is in itself a sort of cement,

I can't find anywhere it says that

so I'd mix it 30:70
with cement and use normal 2:1 style mixes.

nor anywhere that recommends that. I dare say it would work, but there are possibly more optimal mixes.


NT

https://en.wikipedia.org/wiki/Fly_ash#Portland_cement

Fly ash from the precipitators of coal fired power stations was the raw material for the company Pozzolanic Ltd.
Some power stations were better than others as sources. Fiddlers Ferry, Ironbridge, West Burton and Longannet were regular sources. These produced a pale, low residual carbon ash with small particle size. 50% substitution of the cement content was used in the concrete of the Thames Barrier as it made a dense concrete which was slow to cure without the vast damaging heat release of straight ordinary Portland cement during curing. The majority of the ash was transported from West Burton by dedication trains.
Pozzolan was also used extensively to combat "concrete cancer" as Alkali Silcate reaction became known.
Fly ash is a fascinating subject if you research it.

On Thursday, 16 November 2017 18:02:38 UTC, Cynic wrote:

Fly ash from the precipitators of coal fired power stations was the raw material for the company Pozzolanic Ltd.
Some power stations were better than others as sources. Fiddlers Ferry, Ironbridge, West Burton and Longannet were regular sources. These produced a pale, low residual carbon ash with small particle size. 50% substitution of the cement content was used in the concrete of the Thames Barrier as it made a dense concrete which was slow to cure without the vast damaging heat release of straight ordinary Portland cement during curing. The majority of the ash was transported from West Burton by dedication trains.
Pozzolan was also used extensively to combat "concrete cancer" as Alkali Silcate reaction became known.
Fly ash is a fascinating subject if you research it.

Sure... but when used as pozzolan it needs to be extremely finely ground. Wood ash from your fireplace does not cut it.

If not so ground it acts more as a filler, replacing sand, making black mortar.


NT

On Thursday, 16 November 2017 12:56:11 UTC, The Natural Philosopher wrote:
On 16/11/17 12:55, tabbypurr wrote:
On Thursday, 16 November 2017 11:24:30 UTC, The Natural Philosopher wrote:
On 16/11/17 09:43, wrote:


Its that time of year again when operating the multi fuel stove banked
up with an anthracite based briquette product means there is some Ash
to be disposed of. Wood ash is no problem as it can be used in the
garden but I am reluctant to dispose of coal ash in this way though I
believe it may have been used by some in the past so it get bagged up
and taken to the dump or sometimes put in a bag in the non recyclable
bin which often means double handling as it is too hot for plastic
bags.

Next spring we will need to replace some border edging so killing two
birds with one stone I'm thinking of getting one of those moulds
designed for use with cement to cast some edging and use the ash as a
constituent in place of the some of the cement or sand and cast some
edges over the winter as and when I feel like it.
Anybody have any suggestion as to what ratios would make a reasonably
robust mix.

G.Harman

According to wiki it is in itself a sort of cement,

I can't find anywhere it says that

so I'd mix it 30:70
with cement and use normal 2:1 style mixes.

nor anywhere that recommends that. I dare say it would work, but there are possibly more optimal mixes.


Try looking a bit harder mate.

so you didn't find that statement on the wiki either

On 16/11/17 18:59, wrote:
On Thursday, 16 November 2017 12:56:11 UTC, The Natural Philosopher wrote:
On 16/11/17 12:55, tabbypurr wrote:
On Thursday, 16 November 2017 11:24:30 UTC, The Natural Philosopher wrote:
On 16/11/17 09:43, wrote:


Its that time of year again when operating the multi fuel stove banked
up with an anthracite based briquette product means there is some Ash
to be disposed of. Wood ash is no problem as it can be used in the
garden but I am reluctant to dispose of coal ash in this way though I
believe it may have been used by some in the past so it get bagged up
and taken to the dump or sometimes put in a bag in the non recyclable
bin which often means double handling as it is too hot for plastic
bags.

Next spring we will need to replace some border edging so killing two
birds with one stone I'm thinking of getting one of those moulds
designed for use with cement to cast some edging and use the ash as a
constituent in place of the some of the cement or sand and cast some
edges over the winter as and when I feel like it.
Anybody have any suggestion as to what ratios would make a reasonably
robust mix.

G.Harman

According to wiki it is in itself a sort of cement,

I can't find anywhere it says that

so I'd mix it 30:70
with cement and use normal 2:1 style mixes.

nor anywhere that recommends that. I dare say it would work, but there are possibly more optimal mixes.


Try looking a bit harder mate.

so you didn't find that statement on the wiki either

yes I did, but I cant be arsed to justify myself to a lazy **** who
isn't prepared to read the wiki article. Or do research elsewhere.

And whose only motivation is to prove me wrong.

You are pamela and I claim my £5

You sad sick ****.


--
Ideas are more powerful than guns. We would not let our enemies have
guns, why should we let them have ideas?

Josef Stalin

On Thursday, 16 November 2017 19:08:45 UTC, The Natural Philosopher wrote:
On 16/11/17 18:59, tabbypurr wrote:
On Thursday, 16 November 2017 12:56:11 UTC, The Natural Philosopher wrote:
On 16/11/17 12:55, tabbypurr wrote:
On Thursday, 16 November 2017 11:24:30 UTC, The Natural Philosopher

According to wiki it is in itself a sort of cement,

I can't find anywhere it says that

so I'd mix it 30:70
with cement and use normal 2:1 style mixes.

nor anywhere that recommends that. I dare say it would work, but there are possibly more optimal mixes.


Try looking a bit harder mate.

so you didn't find that statement on the wiki either

yes I did, but I cant be arsed to justify myself to a lazy **** who
isn't prepared to read the wiki article. Or do research elsewhere.

I read several

And whose only motivation is to prove me wrong.

mind reading attempt failed

You are pamela and I claim my £5

You sad sick ****.

ookay

The Romans used volcanic and other ashes as pozzolans. I don't have any data as to it's "fineness".

On Fri, 17 Nov 2017 10:07:04 +0000, Chris Hogg wrote:


Sure... but when used as pozzolan it needs to be extremely finely ground. Wood ash from your fireplace does not cut it.

If not so ground it acts more as a filler, replacing sand, making black mortar.

What makes you think that ash from a domestic coal fire isn't fine
enough? Granted, coal burnt in a power station to give PFA is milled
before being blown into the furnace to get it to burn rapidly and
completely, but this diagram suggests the ash from domestic coal fires
has a similar PSD to fly ash, with a maximum at about 10µm.
http://tinyurl.com/yafw9c8h or
https://www.researchgate.net/figure/...s-coal-fly-ash

You're not thinking just of the cinders, are you?

As the OP most of the coal ash I have does appear to quite fine.
Today in what turned out to be a successful attempt to find the
entrances to a rats nest where the rodent had burrowed into a raised
flower bed where the soil is kept between two 2ft high brick walls I
poured some of the ash into one entrance while at the same time
directing a flow of air from a small garden leaf blower into the hole
and as I hoped some emerged from the other holes it had dug.
It actually looked like smoke was emerging not unlike an old style
diesel exhaust.

G.Harman