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Classical ferrocement tank

284 bytes added, 12:28, 29 May 2012

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==Suitable conditions==

~~{{Climate_change~~

~~|heading1=Drought effects on cement~~

|text1='''Effects of drought''': Badly made concrete or cracked linings (e.g. in tanks, dams, waterways, wells, and other structures). <br>'''Underlying causes of effects''': Less water used for curing; Impure water used for mixing. <br>'''To increase resiliency of WASH system''': Ensure adequate mixing, ratios, purity of ingredients; Minimize water content in mixture; Ensure adequate curing.

}}

* Avoid making sub-surface ferrocement or anthill/lime/cement tanks in unstable soil.

* Do not site tanks near big trees whose roots might crack the walls.

==Construction, operations and maintenance==

'''General advice on cement''': A common cause of cracks in structures and linings (e.g. in tanks, dams, waterways, wells) is errors in mixing and applying the cement. First of all, it is important that only pure ingredients are used: clean water, clean sand, clean rocks. The materials have to be mixed very thoroughly. Secondly, the amount of water during mixing needs to minimal: the concrete or cement needs to be just workable, on the dry side even, and not fluid. Thirdly, it is essential that during curing the cement or concrete is kept moist at all times, for at least a week. Structures should be covered with plastic, large leaves or other materials during the curing period, and kept wet regularly.

'''Specific advice''':

[[Image:FerrocementTankDiagram.JPG|thumb|right|300px|Ferrocement tank components.]]

Range of volume: From 1 m3 to over 80 m3.

Marktielewestra

Akvopedia-spade, administrator

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