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Re: GSBN:Clay plastered wall passes 1-hour test!
- To: GSBN GSBN@...
- Subject: Re: GSBN:Clay plastered wall passes 1-hour test!
- From: Derek Roff derek@...
- Date: Fri, 21 Jul 2006 04:12:04 -0600
- Reply-to: "GSBN" GSBN@...
- Sender: "GSBN" GSBN@...
If I understand the numbers, adding some hemp to the lime plaster
_decreases_ adhesion by a factor of eight. That's a big surprise to me.
Can you tell us more? How was the testing done? I'm guessing that these
are shear-strength values. Is that correct?
I'm also curious about how thick the tested plaster was. AndrÃ© mentions
that that the adhesion strength figures are equivalent to 25 and 200 times
the weight of the plaster. I'm thinking that increasing the thickness of
the plaster on a bale wall would have little effect on adhesion, but a
major effect on plaster weight per square meter. AndrÃ©, please tell us
more about how the strength per weight of plaster is calculated.
--On July 21, 2006 9:36:04 AM +0200 AndrÃ© de Bouter
Sorry, there was a mistake in the info I shared on French testing.
this is the right info:
Plaster on bales layed flat:
1000kg/mÂ² (0,01 MPa) for a lime/hemp (+ a small aount of sand)
plaster (=25 times the weight of the plaster)
8000kg/mÂ² (0,08 MPa) for a lime/SAND (no hemp)plaster (=200 times the
weight of the plaster)
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