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Kiko Denzer on Art
Cob: alternative materials/additives.Darel Henman henman at it.to-be.co.jp
Tue Dec 25 19:02:02 PST 2001
Has anybody out there used or heard of the use of any of the following: 1.) nut shells, i.e., almonds, peanuts, wallnuts, or even larger coccunut pieces These I guess would most likely be used like wood chips or saw dust in "sawcrete". Maybe call it nutcrete. Or they should be able to be used in a light clay instead of wood chips. 2.) hair (human or animal) I suppose this would mainly be for fibre in clay-mud plasters 3.) feathers (the middle hornish material stem part is, I believe airtight which would add to thermal resistance. a.) could use as additive to cobs, or cement? b.) used as is in-between walls or ceiling for insulation? Maybe they could be coated with someting is they are inflamable. 4.) Charmaine mentioned, if I remember correctly, that rice husk ash can be used with lime to make a possible stronger natural cement. Also below is an excert for forests.org about an old waterproofing method used in Russia for earthen dams. A biological resulting material called: "GLEY" Below is an excert from: URL: http://forests.org/ric/good_wood/nont_bld.htm#anchor556637 "Related to the word 'glaze', a gley is like a biological plastic membrane such as is found in bogs, which is formed by a bacterial process that requires anaerobic conditions. Traditionally a technique for sealing ponds and dams, there is potential for the process to be adapted for human-made structures. The Russian-devised version for dams uses a slurry of animal waste (pig manure) applied over the inner base and walls of the dam in multiple, thin layers, which is then itself covered with vegetable organic matter such as grass, leaves, waste paper, cardboard, etc. This is all then given a final layer of soil which is tamped down and the mixture is left for several weeks to allow the (anaerobic) bacteria to complete their task, at which time the dam is ready for flooding. Gleys have the potential to revolutionise water storage capacity in regions with hightly porous soils. An aquaculture industry in otherwise unsuitable areas scould be one of the benefits of this technique. Unlike bentonite clay, gley materials are virtually cost-free and are comprised of 'wastes' which would normally be discarded in the normal course of operations. Also, plastic and rubber dam liners may actually be dependent on the same anaerobic process for their own continued effectiveness rather than their lack of holes or punctures ュ ie, it is the anaerobic layer created below them rather than their own membranous qualities which prevent water seepage in the long term. " ------------------------------ end ----------- Darel
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