[Strawbale] concrete footings

[paul sheraton]

for info on lime concrete try here:  
http://www.telling.co.uk/unilitfloorscreedsandconcretes.htm

Ive seen buildings much bigger than 30m2 built using lime concrete and 
mortar for the foundations, lime slabs (with hemp mixed in for insulaion.

Lime concrete is rock hard and will carry the loads of your building no 
prob.

>From: Mark Bigland-Pritchard <mark at lowenergydesign...>
>Reply-To: European strawbale building discussions 
><strawbale at amper....muni.cz>
>To: European strawbale building discussions <strawbale at amper....muni.cz>
>Subject: Re: [Strawbale] concrete footings
>Date: Mon, 13 Feb 2006 02:59:50 -0600
>
>Thanks Paul.
>Tyres are not acceptable on this site - fear of leaching of toxins (whether 
>legitimately or not, I'm not sure, but that is the position taken by the 
>people responsible for the site).  Lime concrete is something I will look 
>at - any suggestions for where I can find data on structural strength / 
>acceptable loadings?
>atb,
>Mark
>
>
>
>
>paul sheraton wrote:
>
>>
>>
>>Hi  Mark,
>>
>>I know you are asking about concrete footings but I was wondering if you 
>>had thought about using tyres filled with earth/rubble?
>>
>>a trench with a low tyre wall as footings, the tyres filled out with earth 
>>(possibly with some lime mixed into the earth). With a wooden sole 
>>plate/plank pinned down onto the footings for the wall to be built on.
>>
>>Have you thought about using lime concrete in place of cement concrete? It 
>>has half the embodied energy of cement.
>>
>>Just some ideas, all the  best for your project
>>
>>Paul
>>
>>>From: Mark Bigland-Pritchard <mark at lowenergydesign...>
>>>Reply-To: European strawbale building discussions 
>>><strawbale at amper....muni.cz>
>>>To: "SB (Europe)" <Strawbale at amper....muni.cz>,        "SB (repp)" 
>>><STRAWBALE at LISTSERV...REPP.ORG>,        "SB (yahoo)" 
>>><SB-r-us at yahoogroups...>,        "SB (bale-on)" 
>>><bale-on at yahoogroups...>
>>>Subject: [Strawbale] concrete footings
>>>Date: Mon, 13 Feb 2006 01:12:31 -0600
>>>
>>>Hi folks.
>>>
>>>I'm organising the building of a small (30 m2) sb structure this spring, 
>>>on an environmentally sensitive site.  We need to minimise the amount of 
>>>concrete going into the ground (to minimise embodied energy, to minimise 
>>>local ecological impact through changed soil chemistry, and to minimise 
>>>transportation costs).  So I've ruled out a concrete pad.  A rubble 
>>>trench foundation is ruled out because there is no suitable rubble 
>>>locally.  I'm therefore looking at some sort of pile foundation.  Treated 
>>>timber below ground level wouldn't meet the ecological criteria set by 
>>>the site managers, and I don't want to take the risk with untreated 
>>>timber; my previous experience of using boulders is that it's not the 
>>>best way to do this because the timbers on top of them have to be 
>>>individually shaped to fit (time-consuming, and not suitable for the 
>>>mostly unskilled volunteer labour which we will have).  So I'm looking at 
>>>using concrete piles, probably arranged in something like a 2m grid, to 
>>>support the building.
>>>
>>>My question is this: does anyone have experience they are willing to 
>>>share of using proprietary systems for shaping the concrete such as that 
>>>at www.bigfootsystems.com ?  (Bigfoot make a bell-shaped footing out of 
>>>recycled plastic, into which the concrete may be poured.)
>>>
>>>My second, more tenative question is:  can this sort of system be used 
>>>with rammed earth instead of concrete?  (I don't think I have the time to 
>>>learn everything I'd need to know to do this this time round, but it 
>>>would be good to know what's possible for future work.)
>>>
>>>atb,
>>>Mark
>>>Borden, SK, Canada
>>>
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>>>    European strawbale building discussion list
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>>
>>
>>
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>>    European strawbale building discussion list
>>
>>Send all messages to:
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>>
>>
>
>____________________________________________________
>    European strawbale building discussion list
>
>Send all messages to:
>Strawbale at amper....muni.cz
>
>Archives, subscription options, etc:
>http://amper.ped.muni.cz/mailman/listinfo/strawbale
>____________________________________________________
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>