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Natural or artificial ground catchment and Lined sub-surface tanks

23 bytes added, 23:22, 5 April 2012

→‎Construction, operations and maintenance

* Admixtures can be added to the concrete mix in order to reduce the amount of water needed. Research has shown that superplasticizers work best by reducing the amount of water that needs to be added when mixing concrete, which results in 35% less shrinkage. The resulting end material is stronger and can reduce the amount of micro cracks in mortar by half compared to normal mortar while resulting in 76% fewer leaks. In general, the amount of plasticizer to be added should not be greater than 2% of the dry material weight. A plasticizer that can be used that is possibly available is household washing up liquid. In hot climates though, more research is needed in the field application of plasticizers, since the reduction of water used (and increased strength of product) may not be that great due to more water needed to prevent drying out between mixing and application.

====Build the tank====

Key construction issues for good workmanship (which also relate to preventing cracking/seepage) and costs for specific lining types are detailed below:<br>

'''Stone Masonry''':

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