I have a bird bath of sentimental value, where the stone support has
broken in two.

It does fit back together, and an earlier attempt to stick it with PVA
lasted for a short while, but I need a permanent fix.

One obvious route is to drill a hole down the centre of each piece, insert
a post of some kind (metal rod?) and fix the whole thing together.

Past experience indicates that I am unlikely to be precise enough in
marking up and drilling to get a snug and accurate fix where the two bits
just fit together on the post.

So my plan is to make the holes a bit bigger for a "sloppy fit", fix the
metal post into one with some kind of cement/glue, then fix offer it up to
the other half with more cement/glue.

Big question - what would be a suitable fixative?
Secondary question - what to use for the post?

Stone upright is about 160mm in diameter.

Cheers


Dave R

--
Windows 8.1 on PCSpecialist box

On 27/05/16 11:56, David wrote:
I have a bird bath of sentimental value, where the stone support has
broken in two.

It does fit back together, and an earlier attempt to stick it with PVA
lasted for a short while, but I need a permanent fix.

One obvious route is to drill a hole down the centre of each piece, insert
a post of some kind (metal rod?) and fix the whole thing together.

Past experience indicates that I am unlikely to be precise enough in
marking up and drilling to get a snug and accurate fix where the two bits
just fit together on the post.

So my plan is to make the holes a bit bigger for a "sloppy fit", fix the
metal post into one with some kind of cement/glue, then fix offer it up to
the other half with more cement/glue.

Big question - what would be a suitable fixative?

Epoxy is the obvious choice.

Milliput is good for terracotta, and there are ones that look like stone
as well.

I question the need to drill and peg it with epoxy too.

PVA is a simply terrible solution

Try and get it all off before you use epoxy or it will never bond properly.

Soak it in water for a few days and wire brush it

Secondary question - what to use for the post?

Stone upright is about 160mm in diameter.

Cheers


Dave R



--
All political activity makes complete sense once the proposition that
all government is basically a self-legalising protection racket, is
fully understood.

On 27/05/16 12:05, The Natural Philosopher wrote:
On 27/05/16 11:56, David wrote:
I have a bird bath of sentimental value, where the stone support has
broken in two.

It does fit back together, and an earlier attempt to stick it with PVA
lasted for a short while, but I need a permanent fix.

One obvious route is to drill a hole down the centre of each piece,
insert
a post of some kind (metal rod?) and fix the whole thing together.

Past experience indicates that I am unlikely to be precise enough in
marking up and drilling to get a snug and accurate fix where the two bits
just fit together on the post.

So my plan is to make the holes a bit bigger for a "sloppy fit", fix the
metal post into one with some kind of cement/glue, then fix offer it
up to
the other half with more cement/glue.

Big question - what would be a suitable fixative?

Epoxy is the obvious choice.

Milliput is good for terracotta, and there are ones that look like stone
as well.

I question the need to drill and peg it with epoxy too.

PVA is a simply terrible solution

Try and get it all off before you use epoxy or it will never bond properly.

Soak it in water for a few days and wire brush it

Also see
https://www.periodliving.co.uk/advic...garden-statue/


Secondary question - what to use for the post?

Stone upright is about 160mm in diameter.

Cheers


Dave R





--
The biggest threat to humanity comes from socialism, which has utterly
diverted our attention away from what really matters to our existential
survival, to indulging in navel gazing and faux moral investigations
into what the world ought to be, whilst we fail utterly to deal with
what it actually is.

On 27/05/16 11:56, David wrote:
I have a bird bath of sentimental value, where the stone support has
broken in two.

It does fit back together, and an earlier attempt to stick it with PVA
lasted for a short while, but I need a permanent fix.

PVA??? That's good for wood and paper and not much else.

Araldite would probably have worked, or a car body filler type glue.

But less so now, unless you can scrub the PVA residue off.

if you give it a good scrub with water, a little detergent and a wire
bush over the faces to be glued, you should be able to get a very good
bond with the correct adhesive.

One obvious route is to drill a hole down the centre of each piece, insert
a post of some kind (metal rod?) and fix the whole thing together.

Past experience indicates that I am unlikely to be precise enough in
marking up and drilling to get a snug and accurate fix where the two bits
just fit together on the post.

So my plan is to make the holes a bit bigger for a "sloppy fit", fix the
metal post into one with some kind of cement/glue, then fix offer it up to
the other half with more cement/glue.

Big question - what would be a suitable fixative?
Secondary question - what to use for the post?

Stone upright is about 160mm in diameter.

Cheers


Dave R

On 27/05/2016 12:16, Tim Watts wrote:
On 27/05/16 11:56, David wrote:
I have a bird bath of sentimental value, where the stone support has
broken in two.

It does fit back together, and an earlier attempt to stick it with PVA
lasted for a short while, but I need a permanent fix.

PVA??? That's good for wood and paper and not much else.

Araldite would probably have worked, or a car body filler type glue.

But less so now, unless you can scrub the PVA residue off.

if you give it a good scrub with water, a little detergent and a wire
bush over the faces to be glued, you should be able to get a very good
bond with the correct adhesive.

One obvious route is to drill a hole down the centre of each piece,
insert
a post of some kind (metal rod?) and fix the whole thing together.

Past experience indicates that I am unlikely to be precise enough in
marking up and drilling to get a snug and accurate fix where the two bits
just fit together on the post.

So my plan is to make the holes a bit bigger for a "sloppy fit", fix the
metal post into one with some kind of cement/glue, then fix offer it
up to
the other half with more cement/glue.



Big question - what would be a suitable fixative?
Polyester resin as used to fix stids in brickwork.
For rixing studs the hol;e should inly be 2mm or so bigger than the stud
but in your case I would think that tha tolerance could be greater
Secondary question - what to use for the post?
Galvanised studding or possibly aluminium rod. Whaterver you use it
must not rust as sandstone is porous and the stud will be damp

Malcolm

On Fri, 27 May 2016 12:05:08 +0100, The Natural Philosopher wrote:

On 27/05/16 11:56, David wrote:
I have a bird bath of sentimental value, where the stone support has
broken in two.

It does fit back together, and an earlier attempt to stick it with PVA
lasted for a short while, but I need a permanent fix.

One obvious route is to drill a hole down the centre of each piece,
insert a post of some kind (metal rod?) and fix the whole thing
together.

Past experience indicates that I am unlikely to be precise enough in
marking up and drilling to get a snug and accurate fix where the two
bits just fit together on the post.

So my plan is to make the holes a bit bigger for a "sloppy fit", fix
the metal post into one with some kind of cement/glue, then fix offer
it up to the other half with more cement/glue.

Big question - what would be a suitable fixative?
snip

PVA is a simply terrible solution

Kudos for the pun :-)

PVA is, however, much used in building for bonding stuff, like fresh
screed over an older concrete floor, and the plastic bottle says that it
will bond concrete, brick, plasterboard etc.

So it seemed like a good option.

Cheers


Dave R



--
Windows 8.1 on PCSpecialist box

On Fri, 27 May 2016 12:16:13 +0100, Tim Watts wrote:

On 27/05/16 11:56, David wrote:
I have a bird bath of sentimental value, where the stone support has
broken in two.

It does fit back together, and an earlier attempt to stick it with PVA
lasted for a short while, but I need a permanent fix.

PVA??? That's good for wood and paper and not much else.

Araldite would probably have worked, or a car body filler type glue.

But less so now, unless you can scrub the PVA residue off.

if you give it a good scrub with water, a little detergent and a wire
bush over the faces to be glued, you should be able to get a very good
bond with the correct adhesive.

One obvious route is to drill a hole down the centre of each piece,
insert a post of some kind (metal rod?) and fix the whole thing
together.

Past experience indicates that I am unlikely to be precise enough in
marking up and drilling to get a snug and accurate fix where the two
bits just fit together on the post.

So my plan is to make the holes a bit bigger for a "sloppy fit", fix
the metal post into one with some kind of cement/glue, then fix offer
it up to the other half with more cement/glue.

Big question - what would be a suitable fixative?
Secondary question - what to use for the post?

Stone upright is about 160mm in diameter.

As I just mentioned to TNP, PVA is much used as a bonding agent by
builders. Comes in large plastic containers.

One thing I forgot to mention - the sandstone is very soft, so I am not
confident that bonding two fairly weak and crumbly surfaces will do more
than encourage the plinth to break again, leaving behind a thin strip of
expensive sand paper.

This is why I was contemplating strengthening it with an internal rod.


Cheers


Dave R




--
Windows 8.1 on PCSpecialist box

On 27/05/16 12:39, Malcolm Race wrote:
On 27/05/2016 12:16, Tim Watts wrote:
On 27/05/16 11:56, David wrote:
I have a bird bath of sentimental value, where the stone support has
broken in two.

It does fit back together, and an earlier attempt to stick it with PVA
lasted for a short while, but I need a permanent fix.

PVA??? That's good for wood and paper and not much else.

Araldite would probably have worked, or a car body filler type glue.

But less so now, unless you can scrub the PVA residue off.

if you give it a good scrub with water, a little detergent and a wire
bush over the faces to be glued, you should be able to get a very good
bond with the correct adhesive.

One obvious route is to drill a hole down the centre of each piece,
insert
a post of some kind (metal rod?) and fix the whole thing together.

Past experience indicates that I am unlikely to be precise enough in
marking up and drilling to get a snug and accurate fix where the two
bits
just fit together on the post.

So my plan is to make the holes a bit bigger for a "sloppy fit", fix the
metal post into one with some kind of cement/glue, then fix offer it
up to
the other half with more cement/glue.



Big question - what would be a suitable fixative?
Polyester resin as used to fix stids in brickwork.
For rixing studs the hol;e should inly be 2mm or so bigger than the stud
but in your case I would think that tha tolerance could be greater
Secondary question - what to use for the post?
Galvanised studding or possibly aluminium rod. Whaterver you use it
must not rust as sandstone is porous and the stud will be damp

If using stud, use stainless...

On 27/05/16 13:13, David wrote:
On Fri, 27 May 2016 12:05:08 +0100, The Natural Philosopher wrote:

On 27/05/16 11:56, David wrote:
I have a bird bath of sentimental value, where the stone support has
broken in two.

It does fit back together, and an earlier attempt to stick it with PVA
lasted for a short while, but I need a permanent fix.

One obvious route is to drill a hole down the centre of each piece,
insert a post of some kind (metal rod?) and fix the whole thing
together.

Past experience indicates that I am unlikely to be precise enough in
marking up and drilling to get a snug and accurate fix where the two
bits just fit together on the post.

So my plan is to make the holes a bit bigger for a "sloppy fit", fix
the metal post into one with some kind of cement/glue, then fix offer
it up to the other half with more cement/glue.

Big question - what would be a suitable fixative?
snip

PVA is a simply terrible solution

Kudos for the pun :-)

PVA is, however, much used in building for bonding stuff, like fresh
screed over an older concrete floor, and the plastic bottle says that it
will bond concrete, brick, plasterboard etc.


You believed that?

It is used to prep old surfaces for new plaster and it does that well.

For almost every other claimed application, there's something better.

PVA is not waterproof and it has bugger all gap filling properties - you
need both.

On 27/05/16 13:17, David wrote:
On Fri, 27 May 2016 12:16:13 +0100, Tim Watts wrote:

On 27/05/16 11:56, David wrote:
I have a bird bath of sentimental value, where the stone support has
broken in two.

It does fit back together, and an earlier attempt to stick it with PVA
lasted for a short while, but I need a permanent fix.

PVA??? That's good for wood and paper and not much else.

Araldite would probably have worked, or a car body filler type glue.

But less so now, unless you can scrub the PVA residue off.

if you give it a good scrub with water, a little detergent and a wire
bush over the faces to be glued, you should be able to get a very good
bond with the correct adhesive.

One obvious route is to drill a hole down the centre of each piece,
insert a post of some kind (metal rod?) and fix the whole thing
together.

Past experience indicates that I am unlikely to be precise enough in
marking up and drilling to get a snug and accurate fix where the two
bits just fit together on the post.

So my plan is to make the holes a bit bigger for a "sloppy fit", fix
the metal post into one with some kind of cement/glue, then fix offer
it up to the other half with more cement/glue.

Big question - what would be a suitable fixative?
Secondary question - what to use for the post?

Stone upright is about 160mm in diameter.

As I just mentioned to TNP, PVA is much used as a bonding agent by
builders. Comes in large plastic containers.

One thing I forgot to mention - the sandstone is very soft, so I am not
confident that bonding two fairly weak and crumbly surfaces will do more
than encourage the plinth to break again, leaving behind a thin strip of
expensive sand paper.

This is why I was contemplating strengthening it with an internal rod.

That's good logic - I'm trying to recall how weak sandstone is...

In that case, some screwfix no nonsense anchor resin (which is a
vinylester IIRC) should work quite well and be inexpensive.

Blow all dust out of the holes you drill, pump full of resin, insert
stainless stud into one, apply other piece, clamp.

On Fri, 27 May 2016 13:34:36 +0100, Tim Watts wrote:

On 27/05/16 13:17, David wrote:
On Fri, 27 May 2016 12:16:13 +0100, Tim Watts wrote:

On 27/05/16 11:56, David wrote:
I have a bird bath of sentimental value, where the stone support has
broken in two.

It does fit back together, and an earlier attempt to stick it with
PVA lasted for a short while, but I need a permanent fix.

PVA??? That's good for wood and paper and not much else.

Araldite would probably have worked, or a car body filler type glue.

But less so now, unless you can scrub the PVA residue off.

if you give it a good scrub with water, a little detergent and a wire
bush over the faces to be glued, you should be able to get a very good
bond with the correct adhesive.

One obvious route is to drill a hole down the centre of each piece,
insert a post of some kind (metal rod?) and fix the whole thing
together.

Past experience indicates that I am unlikely to be precise enough in
marking up and drilling to get a snug and accurate fix where the two
bits just fit together on the post.

So my plan is to make the holes a bit bigger for a "sloppy fit", fix
the metal post into one with some kind of cement/glue, then fix offer
it up to the other half with more cement/glue.

Big question - what would be a suitable fixative?
Secondary question - what to use for the post?

Stone upright is about 160mm in diameter.

As I just mentioned to TNP, PVA is much used as a bonding agent by
builders. Comes in large plastic containers.

One thing I forgot to mention - the sandstone is very soft, so I am not
confident that bonding two fairly weak and crumbly surfaces will do
more than encourage the plinth to break again, leaving behind a thin
strip of expensive sand paper.

This is why I was contemplating strengthening it with an internal rod.

That's good logic - I'm trying to recall how weak sandstone is...

In that case, some screwfix no nonsense anchor resin (which is a
vinylester IIRC) should work quite well and be inexpensive.

Blow all dust out of the holes you drill, pump full of resin, insert
stainless stud into one, apply other piece, clamp.

Sounds like a plan.

All I need now is a suitable clamp.

Although given the weight it should stay in place one fitted together
standing upright - the break is almost straight across.

At most it should need some support to stop an unplanned wobble.

Cheers

Dave R



--
Windows 8.1 on PCSpecialist box

On Friday, 27 May 2016 11:56:48 UTC+1, David wrote:
I have a bird bath of sentimental value, where the stone support has
broken in two.

It does fit back together, and an earlier attempt to stick it with PVA
lasted for a short while, but I need a permanent fix.

One obvious route is to drill a hole down the centre of each piece, insert
a post of some kind (metal rod?) and fix the whole thing together.

Past experience indicates that I am unlikely to be precise enough in
marking up and drilling to get a snug and accurate fix where the two bits
just fit together on the post.

So my plan is to make the holes a bit bigger for a "sloppy fit", fix the
metal post into one with some kind of cement/glue, then fix offer it up to
the other half with more cement/glue.

Big question - what would be a suitable fixative?
Secondary question - what to use for the post?

Stone upright is about 160mm in diameter.


Stainless steel for the joining rod. And just plain sand & cement for the filler.
Stone is very weak in tension, no point in some super strong glue.

In message ,
harry writes
Stainless steel for the joining rod. And just plain sand & cement for
the filler. Stone is very weak in tension, no point in some super
strong glue.

Many years ago I was working in Liverpool Anglican Cathedral. A building
surveyor was there supervising repairs so I asked him what they were
using. He just said epoxy. I know no more.

But, my understanding of the virtues of epoxy includes the concept that
epoxy molecules are small and so it freely wets and runs into what it is
bonding, unlike the common "fibreglass resin".

The Cathedral is, of course, a sandstone structure.
--
Bill

This may seem stupid at first glance but many years ago a Neighbour had a
sun dial with this problem and he used a length of stainless steel studding
and an epoxy of some kind. The fact that it was studding made it actually
less likely to move when the first part was cured. Always leave the resin in
the hole below the level of the break or when you come to try to line up the
bits it will leave a gap all around. Not a job to be hurried he told me.

Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"David" wrote in message
...
I have a bird bath of sentimental value, where the stone support has
broken in two.

It does fit back together, and an earlier attempt to stick it with PVA
lasted for a short while, but I need a permanent fix.

One obvious route is to drill a hole down the centre of each piece, insert
a post of some kind (metal rod?) and fix the whole thing together.

Past experience indicates that I am unlikely to be precise enough in
marking up and drilling to get a snug and accurate fix where the two bits
just fit together on the post.

So my plan is to make the holes a bit bigger for a "sloppy fit", fix the
metal post into one with some kind of cement/glue, then fix offer it up to
the other half with more cement/glue.

Big question - what would be a suitable fixative?
Secondary question - what to use for the post?

Stone upright is about 160mm in diameter.

Cheers


Dave R

--
Windows 8.1 on PCSpecialist box