Return Scroll Stop Automatic mode

Ideas, inventions and innovations for sustainable developmentLambda an entire tube thatched panel glued?

Inventions and ideas for sustainable development.
Obamot
Econologue expert
Econologue expert
posts: 11085
Registration: 22 / 08 / 09, 22: 38
Location: regio genevesis
x 63

Unread Messageby Obamot » 06 / 11 / 15, 21: 28

Wouawouh, you have probably come up with the solution to my cogitations since this summer Ahmed!

It looks awesome this papercrete: (contraction of paper / paper and concrete / concrete) simply excellent, thank you very much:
https://fr.wikipedia.org/wiki/Liant_papier

It immediately gives me the idea to improve the process ( : Lol: )
I think of a sandwich:
The "chaumcrete", With large lemonade and potion of fries! (Starch as binder, and lemonade for laying between the batch) misses more than the milkshake!

Right here:
http://www.escales-construction.com/ind ... &Itemid=10

... potato starch is used as a binder in a coating for finishes (mixture):

- fine sieved sand (4 volumes)
- sieved clay (1 volume)
- potato starch (0,1 volumes) cooked in 1 volume of water
- water (2 volumes).

All this opens new paths ...
0 x
"The important thing is not the path to happiness, the important thing is the way" - Lao Tzu

Ahmed
Econologue expert
Econologue expert
posts: 6130
Registration: 25 / 02 / 08, 18: 54
Location: Burgundy
x 377

Unread Messageby Ahmed » 06 / 11 / 15, 22: 14

I've done a few tests of papercrete blocks and it's true that it's interesting ...
A friend used this process in full size: he poured a mixture of paper / lime / sand between the framework of a workshop extension; It kept the formwork in planks inside for the layout and the outside remained crude. He preferred to add sand for better resistance to the weather because he did not want to make a coating. His main motivation was the low cost.

I wonder about the starch holding and its relevance to lime?
At one point, you talk about waterproofing, but the permeability to water vapor is an important asset ...
0 x
"Do not believe above all that I tell you."
User avatar
Hic
Grand Econologue
Grand Econologue
posts: 995
Registration: 04 / 04 / 08, 19: 50
x 3

Unread Messageby Hic » 07 / 11 / 15, 10: 14

Here is the THERMAL CONDUCTIVITY USEFUL (1)
In W / (mK) of the compressed straw 0,052

Except that my panel is not compressed
So what is the lambda of uncompressed straw, glued?



This will be a panel weighing less than 40kg / m3




Compressed straw
- transversely to the direction of the straw
- in the sense of straw
80 r 120
0,052
*** http://www.legifrance.gouv.fr/affichTex ... rieLien=id ***
0 x
"Let food be thy medicine and thy medicine be thy food" Hippocrates
"Everything has a price has no value" Nietzche
Torture for Dummies
Forbid to express the idea that the field is acceleration (magnetic and gravitational)
And you get your patent mental torture option executioner successfully
Obamot
Econologue expert
Econologue expert
posts: 11085
Registration: 22 / 08 / 09, 22: 38
Location: regio genevesis
x 63

Unread Messageby Obamot » 07 / 11 / 15, 11: 21

According to the RT2000, the thermal conductivity of an air knife would therefore be lower:

Thickness (mm) / Resistance ((m²·K) / W)
0723.068.082 / 0723.592.741
0723.068.082 / 0723.592.741
0723.068.082 / 0723.592.741
0723.068.082 / 0723.592.741
0723.068.082 / 0723.592.741
0723.068.082 / 0723.592.741
0723.068.082 / 0723.592.741
0723.068.082 / 0723.592.741

The interesting point and to note that from a certain thickness, the coef ceiling, would like ... would like ...

As already said, if it is not hermetic, it is a bit like having a wool sweater on the back, with a gust of wind the stored heat goes away, and it works as long as it There is regular supply of semi-trapped heat in the air ...

It deserves to be advanced (Not normal that the blade of air is better than an insulator ... given the loss in convection that must also be calculated for a bale of straw, I presume ...), there is absolutely no reason for Think that it could not be! (But without that the coef remains very theoretical).

And be careful not to mix the units, you seem to speak of the coefficient U which is its inverse expressed in W / (m²·K)

@Ahmed: In fact, the starch would not be used / adviser in this mix, it is rather what should be avoided since sugar attracts xylophagous, that is why the papercrete is pretty great, I thought Rather use red earth with bauxite in it, in fact (material found on site ... which would replace all or part of the sand, and there the starch can eventually replace the cement, since it sticks the paper and 'It is used in the local cob, as mentioned by the link ... But it implies to look after the foundations to have walls that remain "dry"). I am inclined to abandon starch ... This is all the more so because bauxite contains by nature aluminum (return to the Roman cement, lime mortar, which contains more aluminum than silicon, or papercrete to base of ...). See how this earth can intervene in the mixture: either replace the volcanic slag of the original pozzolana, or see on the spot how they make to adapt it to the papercrete (to make tests is required and strongly advised! ^^) find a good mix For not using portland cement would be the icing on the cake that would save a lot of gray energy, see if that would be possible with the papercrete!
Is there any pozzolana there (there are volcanoes), I do not know, no doubt, by cons there is already sea water ... ^^

As far as waterproofing is concerned, it is necessary to be clear, this one is not total (one sees it with the parures-vapor which let filter just what it is necessary ... they are of several types). So yes I confirm, hermeticity ad hoc, but not absolute: controlled!
0 x
"The important thing is not the path to happiness, the important thing is the way" - Lao Tzu
User avatar
Hic
Grand Econologue
Grand Econologue
posts: 995
Registration: 04 / 04 / 08, 19: 50
x 3

Unread Messageby Hic » 07 / 11 / 15, 14: 54

Obamot wrote:According to the RT2000, the thermal conductivity of an air knife would therefore be lower:

Thickness (mm) / Resistance ((m²·K) / W)
0723.068.082 / 0723.592.741
0723.068.082 / 0723.592.741
0723.068.082 / 0723.592.741
0723.068.082 / 0723.592.741
0723.068.082 / 0723.592.741
0723.068.082 / 0723.592.741
0723.068.082 / 0723.592.741
0723.068.082 / 0723.592.741

The interesting point and to note that from a certain thickness, the coef ceiling, would like ... would like ...

Hi Obamot

To simplify

The best insulator, after vacuum, is air without convection

So the best insulator is an airgel that weighs 2kg / m3
Composed of 1kg of air separated into microbules and 1kg of airgel

And the best lambda is always the lightest insulation with the smallest air bubbles

Is not that simpler?


The lambda of the straw thatch of straw, uncompressed and glued does not exist!
0 x
"Let food be thy medicine and thy medicine be thy food" Hippocrates
"Everything has a price has no value" Nietzche
Torture for Dummies
Forbid to express the idea that the field is acceleration (magnetic and gravitational)
And you get your patent mental torture option executioner successfully

franzlim
I discovered econologic
I discovered econologic
posts: 1
Registration: 02 / 04 / 16, 23: 13

Return to posts index Reply Like Re: Lambda of a glued full tube thatch panel?

Unread Messageby franzlim » 02 / 04 / 16, 23: 34

Hello,
I just registered to answer this discussion.

According to the sources we find different lambda for thatch. The National Association of Roofers lambda 0,065 (Internal mail), which must correspond to "Other vegetable fiber insulation", the density of which lies between 60 and 200 kg / m3 in Annex IX to 28 Dec December 2012 (https://www.legifrance.gouv.fr/affichTexte.do?cidTexte=JORFTEXT000026871753&dateTexte=20160402)
In the journal Ekologic No. 39, June / Jul 2014 pp. 40-48 E. Karolyi in his article Building in Chaume, the Chaume in three techniques, speaks of a lambda 0.056.

After that, there is probably a difference between the use of rye and reed, but I think it will not look far.

Moreover, "thatched panels" is already used as for example on the building of the agency Loire-Atlantique Development (I do not know the technique of manufacture). Similarly, doormats (http://www.pailleetpaillon.fr/le-paillasson) Were used to make the walls of some houses in the Camargue. I have also seen people who used it as a thin insulation inside.

Franz
0 x


Back to "ideas, inventions and innovations for sustainable development"

Who is online ?

Users browsing this forum: No registered users and guest 1

Popular searches