Hydraulic lime plaster seals, worries

Construction of natural or ecological habitat: plans, design, advice, expertise, materials, geobiology ... House, construction, heating, insulation: you have just received one or more quotes. Can't choose? State your problem here and we will advise you on the right choice! Help in reading DPE or environmental energy diagnostics. Help with the purchase or sale of real estate.
PatrickDiois
I discovered econologic
I discovered econologic
posts: 2
Registration: 07/06/09, 13:57
Location: Diois (Drome)

Hydraulic lime plaster seals, worries




by PatrickDiois » 07/06/09, 14:06

Hello,
I had our last farm done last summer, joints between the old stones, inside, in the old sheepfold that we have built. These joints, at my request, were made with hydraulic lime and yellow sand.
The winter went well, with underfloor heating and a good pellet boiler, but as soon as the heating stopped, a month ago, small particles of sand tumble every day and it becomes very painful .
The craftsman wants to put a "fixer", which I like moderately and I'm looking for a more ecological solution.

Someone would have an idea or an experience?

Thanks in advance,

Patrick
0 x
Christophe
Moderator
Moderator
posts: 79126
Registration: 10/02/03, 14:06
Location: Greenhouse planet
x 10974




by Christophe » 07/06/09, 19:35

It's weird is the "leak" deep or just on the surface? I mean: if you scratch, in the end all the lime would come off or is it just on the surface?

When was the work done in relation to the beginning of the heating season?

It looks like it has badly "calcified" but I ignore the phenomenon that you see ...

It should be part of the guarantee of the works.
0 x
User avatar
delnoram
Moderator
Moderator
posts: 1322
Registration: 27/08/05, 22:14
Location: Mâcon-Tournus
x 2




by delnoram » 07/06/09, 19:52

I made a coating lime sands last year, well I was a great beginner in this area, the coup estetiquement c not terrible at all, but no sand that falls despite being out in the weather.
: Shock:
0 x
"Thinking should not it be taught in school rather than to make learning by heart the facts that are not all proven?"
"It's not because they are likely to be wrong they are right!" (Coluche)
PatrickDiois
I discovered econologic
I discovered econologic
posts: 2
Registration: 07/06/09, 13:57
Location: Diois (Drome)

Lime plaster




by PatrickDiois » 07/06/09, 20:13

In response to Christophe, the plaster was done in April, with the spring a little "wet" and a little difficult to dry (the house had been uninhabited for 4 years of work.

The fall is very fine (they are not big pieces) and only in some places.

It is true that this comes within the guarantee of the craftsman, but the proposed solution has a "chemical" side which I do not really like.

Thank you for the answer,

Patrick
0 x
User avatar
Lietseu
Econologue expert
Econologue expert
posts: 2327
Registration: 06/04/07, 06:33
Location: Antwerp Belgium, Skype lietseu1
x 3




by Lietseu » 07/06/09, 20:42

I am half astonished, as regards your coating if mixture of lime and sand, if it did not dry quickly or it was soggy we can imagine that indeed, they did not like it !
If I'm not being careful, we say that the plasters are hydraulic when they contain lime (because it is very resistant to humidity) we learn by visiting the castles of the Loire and in the Périgord that most of the "mortars and plasters" were based on lime and sand at the time of their construction ....

I have a Périgourdine recipe of 4-2-1 that is great to imitate the color of the cornerstones and even sticking sand on it ... I get to make a stone coating seen the most beautiful effects (421 for 4 yellow sands, 2 lime and 1 white lafarge cement) ... the mortar is first class and has a very good performance

Of course each mason has his thing especially in this corner of France, where ancient mortars are made of clay and mixed lime.

Greetings from Lietseu the lover of old stones, econology cat beautiful ship!
0 x
By removing Human Nature, he was far from his nature! Lietseu
"The power of love, must be stronger than the love of power" contemporary Lie Tzu?
One sees clearly only with the heart, the essential is invisible to the eyes ...
User avatar
Rabbit
Grand Econologue
Grand Econologue
posts: 823
Registration: 22/07/05, 23:50
x 2




by Rabbit » 07/06/09, 23:18

I wonder if it's really hydraulic lime.
In fact, hydraulic lime has a reaction very close to
cement .If this is really hydraulic lime 3 possibilite
I think they should be considered.
-How the hydraulic hot was perime.
-It has been added lime which was perished.
-Is the macon was too generous in sand.
The fact that the mortar was laid in cool, wet weather is
a plus for taking the mortar.

Another possibility is that it is not hydraulic lime
but lime too old or preserved in
bad conditions that have been used.
begins its carbonation, the mortar crumbles once dry.

It is possible to refill in lime a mortar pose, but this
will be on a shallow depth .5 mm max.For this we must do
lime water (fresh lime) and impregnate the
mortar.This must be done in cool, wet weather.
if possible.After setting and drying, the mortar will be clearer.
This says it will not make a good mortar for that.

http://fr.wikipedia.org/wiki/Eau_de_chaux
http://fr.ekopedia.org/Eau_de_chaux
Last edited by Rabbit the 08 / 06 / 09, 10: 43, 1 edited once.
0 x
Christophe
Moderator
Moderator
posts: 79126
Registration: 10/02/03, 14:06
Location: Greenhouse planet
x 10974




by Christophe » 08/06/09, 00:46

Ben I would be, like Rabbit, also for reloading ... but the artist certainly does not want to get bored (and recognize his mistake?) ...

Now I do not quite understand why it held during the warm-up period and it started to crumble only after ... if it was a dosing problem that would have never taken ... or you did not have not noticed before? :?:
0 x
User avatar
bham
Econologue expert
Econologue expert
posts: 1666
Registration: 20/12/04, 17:36
x 6




by bham » 08/06/09, 09:03

Otherwise, you can try the tapestry glue, it seems like it works.
0 x
User avatar
Rabbit
Grand Econologue
Grand Econologue
posts: 823
Registration: 22/07/05, 23:50
x 2




by Rabbit » 08/06/09, 10:54

The upholstery glue actually uses to make the
lime mortars. In this case it serves as a water retort
to allow the mortar to take hold.
The biggest danger for taking a lime mortar
or natural hydraulic lime is dehydration before
the catch.C is why it is necessary to avoid the wind and the hot weather.

The tapestry glue applied to the mortar avoids
the disfiguring mortar is crumbling on the surface but this improves in
nothing his qualities.
I proposed limewater because it allows to introduce
Ca2 + in the mortar. The Ca2 + will "carbonate" which will improve
the properties of the mortar.
The ideal is still to make a quality mortar.
0 x
greg
I learn econologic
I learn econologic
posts: 40
Registration: 31/07/07, 08:57
Location: 46




by greg » 13/06/09, 18:08

Hello
a friend has the same problem at home but little info on the procedure because it was done before he bought.
it is not especially wet but it looks like there is a kind of very fine mycellium that destroys the mortar. is it possible?
greg
0 x

Go back to "Real estate and eco-construction: diagnostics, HQE, HPE, bioclimatism, natural habitat and climatic architecture"

Who is online ?

Users browsing this forum : No registered users and 104 guests