[Stoves] Fly ash cement, Curiosity, contibnued---

[Dean Still]

Hi Tom,

How long does your material last at 850 C contacted by flame?

Best,

Dean


On Sun, Feb 8, 2015 at 2:35 PM, <mtrevor at mail.mh> wrote:

> Glad I re-opened the topic and that Tom has been brought in to it.
> It is exciting to here that Ron Christa an other have also picked up
> geopolymers
> You all being where access to materials are available with multiple
> people could lead to something great.
>
> Watch and waiting to see the developments by all.
>
> Michael
>
> -----Original Message----- From: T Hastings
> Sent: Sunday, February 08, 2015 10:19 PM
> To: Discussion of biomass cooking stoves
> Subject: Re: [Stoves] Fly ash cement, Curiosity.
>
> Hi Michael, Crispin and all the list members,
>
> Rather than answering or responding to all the questions and notes
> raised on this topic I will try and share with you some of my
> experience on Fly ash for stoves.
>
> What I believe Michael has read about and discussed with Zeobond is
> Fly ash based geopolymer. These are cement like materials made by
> mixing Coal fired power station waste (fly ash) with an alkali
> activator. The theory is that the alkali dissolves at least a portion
> of the fly ash which is mostly aluminium and silicon. These ions
> recombine to former a polymer or chain like structure utilising the
> alkali cation to balance the charge of the aluminium atom.
>
> Several companies are developing it as a low CO2 replacement for OPC
> (Ordinary Portland Cement) They mix the binder with regular aggregates
> to make a OPC substitute.
>
> In Australia, Zeobond have used a fly ash material to make footpaths
> and some precast past. The mixing plant they refer to is a cement
> batching plant...its big.
> Another company in Queensland, Wagners have made very large precast
> beams for a government building and are or will be making a airport
> runway from their Earth Friendly Concrete.
>
> You can look Wagners up here http://www.wagner.com.au/capabilities/efc/
>
> In South Africa, geopolymer is also making inroads
> For example  0% cement concrete - M&R geopolymer concrete a South
> African first!!  https://www.youtube.com/watch?v=wArEbfC91m0
>
> My own work at Unity Stove is similar but different. For these
> companies to be successful they have to produce a product that is
> comparable in price and performance to bulk portland cement type
> concrete for building works. I am really not how sure their materials
> will work in furnace lining type applications like the inside of solid
> fuel stoves.  The KSIAL material developed by Unity Stove is more
> expensive to manufacture as it uses a far greater portion of activator
> to try and achieve more dissolution of the aluminium and silica
> sources. We also use different aluminium and silica sources ( due in
> part to fly ash coming in tanker truck loads only) Also to avoid legal
> issues KSIAL is based on old patents....yes geopolymers having been
> around long enough for patents to expire. Like their materials, KSIAL
> it not a DIY just add water product like portland cement so it very
> hard to bag some up and hope that an experimenter follows the
> instructions to mix and cure correctly.
>
> I am sure it a type of stove material that some of the well funded
> organisations working in this field will pick up and run with one day.
> As I have been promoting, geopolymer materials such as KSIAL will
> allow corrosion resistant stoves to be produced in small workshops
> using readily available materials. Stoves can be repaired and or
> crushed and recycled to make new stoves. It is compatible with
> insulating aggregates such as perlite, scoria and wood ash and can
> even be foamed to make a stove liner, pot support and insulation in
> one piece. Its low thermal conductivity means the surface may get hot
> but will not instantly burn skin in the way a metal stove can.
>
> Anyway Michael, you are definitely on the right track with Fly Ash
> cements and I would just love to pop over to the Marshall Islands with
> a 20' container of materials and everything needed to start a mini
> factory and start making stoves with you.
>
> Regards
> Thomas Hastings
> Unity Stove
>
>
>
>
>
> Some keywords for further research if you are interested in
> researching this type of material further. Be aware though that Prof.
> Davidovits does believe the pyramids are constructed from Geoploymer
> and has even reconstructed and demonstated how they could have been
> built using Nile silt and Natron.
>
> Davidovits Geopolymer alkali activated cement refractory foam
> and of course google Unity Stove to see Geopolymer stoves in use.
>
> On Sun, Feb 8, 2015 at 5:54 PM,  <mtrevor at mail.mh> wrote:
>
>>
>>
>> From: Crispin Pemberton-Pigott
>> Sent: Sunday, February 08, 2015 3:57 PM
>> To: 'Discussion of biomass cooking stoves'
>> Subject: Re: [Stoves] Fly ash cement, Curiosity.
>>
>>
>> Thanks.
>>
>>
>>
>> Did he say if it is transportable? Or does it have a very short packaged
>> life?
>>
>>
>>
>> All you need is to find one of those mixing plants.
>>
>> Crispin
>>
>>
>>
>> If anyone is interested ----I made an inquiry with Zeobond. The E-crete is
>> not available in powdered bagged form.
>>
>> It is a commercial large mix batch plant product.
>>
>>
>>
>> Michael
>>
>> Marshall Islands
>>
>> ________________________________
>> _______________________________________________
>> Stoves mailing list
>>
>> to Send a Message to the list, use the email address
>> stoves at lists.bioenergylists.org
>>
>> to UNSUBSCRIBE or Change your List Settings use the web page
>> http://lists.bioenergylists.org/mailman/listinfo/stoves_
>> lists.bioenergylists.org
>>
>> for more Biomass Cooking Stoves,  News and Information see our web site:
>> http://stoves.bioenergylists.org/
>>
>>
>> _______________________________________________
>> Stoves mailing list
>>
>> to Send a Message to the list, use the email address
>> stoves at lists.bioenergylists.org
>>
>> to UNSUBSCRIBE or Change your List Settings use the web page
>> http://lists.bioenergylists.org/mailman/listinfo/stoves_
>> lists.bioenergylists.org
>>
>> for more Biomass Cooking Stoves,  News and Information see our web site:
>> http://stoves.bioenergylists.org/
>>
>>
>>
> _______________________________________________
> Stoves mailing list
>
> to Send a Message to the list, use the email address
> stoves at lists.bioenergylists.org
>
> to UNSUBSCRIBE or Change your List Settings use the web page
> http://lists.bioenergylists.org/mailman/listinfo/stoves_
> lists.bioenergylists.org
>
> for more Biomass Cooking Stoves,  News and Information see our web site:
> http://stoves.bioenergylists.org/
>
> _______________________________________________
> Stoves mailing list
>
> to Send a Message to the list, use the email address
> stoves at lists.bioenergylists.org
>
> to UNSUBSCRIBE or Change your List Settings use the web page
> http://lists.bioenergylists.org/mailman/listinfo/stoves_
> lists.bioenergylists.org
>
> for more Biomass Cooking Stoves,  News and Information see our web site:
> http://stoves.bioenergylists.org/
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20150208/e7366d24/attachment.html>