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Tradicionalmente se ha considerado el 10-12&nbsp;% de agua como la cantidad idónea para tierra y bloques compactados: menos agua y más compactación resultan en bloques más resistentes. Sin embargo las pruebas y la experiencia de autores como Kaki Hunter y Donald Kiffmeyer<ref>{{cita libro |apellido=Hunter |apellido2=Kiffmeyer |nombre=Kaki | nombre2=Donald |título=Earthbag Building. The Tools, Tips and Techniques |editorial=New Society Publishers |lugar-publicación=Canadá |fecha-publicación=2010 |año-original=2004 |página=18 |idioma=inglés |isbn=978-0-86571-507-3}}</ref>, experimentos realizados en el FEB Building Research Institute –Universidad de Kassel– publicados en el libro de Gernot Minke ''Earth Construction Handbook'' concluyen que el mismo suelo con el doble de agua (hasta el 20&nbsp;%) produce bloques con mayor resistencia a la compresión:
Tradicionalmente se ha considerado el 10-12&nbsp;% de agua como la cantidad idónea para tierra y bloques compactados: menos agua y más compactación resultan en bloques más resistentes. Sin embargo las pruebas y la experiencia de autores como Kaki Hunter y Donald Kiffmeyer<ref>{{cita libro |apellido=Hunter |apellido2=Kiffmeyer |nombre=Kaki | nombre2=Donald |título=Earthbag Building. The Tools, Tips and Techniques |editorial=New Society Publishers |lugar-publicación=Canadá |fecha-publicación=2010 |año-original=2004 |página=18 |idioma=inglés |isbn=978-0-86571-507-3}}</ref>, experimentos realizados en el FEB Building Research Institute –Universidad de Kassel– publicados en el libro de Gernot Minke ''Earth Construction Handbook'' concluyen que el mismo suelo con el doble de agua (hasta el 20&nbsp;%) produce bloques con mayor resistencia a la compresión:


<span class="cita">Flood Control. [...] Not only do sandbags hold back unruly floodwaters, they actually increase in strength after submersion in water. We had this lesson driven home to us when a flash flood raged through our hometown. Backyards became awash in silt-laden floodwater that poured unceremoniously through the door of our Honey House dome, leaving about 25 cm of water behind. By the next morning, the water had percolated through our porous, unfinished earthen floor leaving a nice layer of thick, red mud as the only evidence of its presence. Other than dissolving some of the earth plaster from the walls at floor level, no damage was done. In fact, the bags that had been submerged eventually dried harder than they had been before.</span> Earthbag building (Kaki Hunter, Donald Kiffmeyer) (p. 8-9)
<div class="cita">Flood Control. [...] Not only do sandbags hold back unruly floodwaters, they actually increase in strength after submersion in water. We had this lesson driven home to us when a flash flood raged through our hometown. Backyards became awash in silt-laden floodwater that poured unceremoniously through the door of our Honey House dome, leaving about 25 cm of water behind. By the next morning, the water had percolated through our porous, unfinished earthen floor leaving a nice layer of thick, red mud as the only evidence of its presence. Other than dissolving some of the earth plaster from the walls at floor level, no damage was done. In fact, the bags that had been submerged eventually dried harder than they had been before. Earthbag building (Kaki Hunter, Donald Kiffmeyer) (p. 8-9)</div>


   
   
<span class="cita">Rammed earth is produced with low moisture and high compaction. When there is too much moisture in the mix, the earth will "jelly-up" rather than compact. The thinking has been that low moisture, high compaction makes a harder brick/block. Harder equals stronger, etc. What Minke is showing us is that the same soil with almost twice the ideal moisture content placed into a form and jigged (or in the earthbag fashion, tamped from above with a hand tamper), produces a finished block with a higher compression strengh than that of a ten percent moisture content rammed earth equivalent.</span> Earthbag building (Kaki Hunter, Donald Kiffmeyer) (p. 18)
<div class="cita">Rammed earth is produced with low moisture and high compaction. When there is too much moisture in the mix, the earth will "jelly-up" rather than compact. The thinking has been that low moisture, high compaction makes a harder brick/block. Harder equals stronger, etc. What Minke is showing us is that the same soil with almost twice the ideal moisture content placed into a form and jigged (or in the earthbag fashion, tamped from above with a hand tamper), produces a finished block with a higher compression strengh than that of a ten percent moisture content rammed earth equivalent. Earthbag building (Kaki Hunter, Donald Kiffmeyer) (p. 18)</div>


Los sacos con mezclas más húmedas rezuman al compactarlos, requieren menos golpes y los bloques resultan más gruesos. Hasta que se asientan son más blandos e inestables para sostenerse sobre ellos (meclas más secas resultan en paredes más firmes).
Los sacos con mezclas más húmedas rezuman al compactarlos, requieren menos golpes y los bloques resultan más gruesos. Hasta que se asientan son más blandos e inestables para sostenerse sobre ellos (meclas más secas resultan en paredes más firmes).
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