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The application of Appropriate Technology

Storage Tank Photos

Posted on Nov 20, 2011

Photographs showing the construction of a large 41,000 litre ferrocement storage tank. This will open in a new window. Digging the foundations of the water tank. Flattening compacting the ground of the foundations. Cutting the re-bar for the base and walls. Marking out the tank area on the base. Joining chicken wire to the outside of the re-bar. The complete reinforcement. Note the exit pipes and washouts. Sieving the sand for the cement. Applying the first layer of cement. Applying the second layer of cement. Re-bar for the roof protruding from the top of the walls. Attaching the re-bar for the roof. Note the supporting tower in the canter, essential in large tanks. Attaching the chicken wire for to the re-bar on the roof. Filling in around the base with large stones. The finished 41,000 litre tank, enough for 230 families. A smaller cement tank. A small plastic tank attached to a rain-catchment...

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Water Tank Construction & Design

Posted on Nov 20, 2011

Information about the design and construction of water tanks.

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Reservoir Tank – Mould

Posted on Nov 20, 2011

The reservoir tank is placed at a point near the village that is higher than all the houses that are to be supplied. The tank must be large enough to ensure an uninterrupted supply during the times of day when there is the peak demand. The tank is thus sized according to the size of the population and the flow rate from the spring during the dry season. The tank in this system is a 13 000 litre tank made from reinforced concrete using a pre-fabricated mould. The tank has a vaulted brick roof, a method that is both cheaper and quicker than making a reinforced concrete roof. Preparing the ground for the reservoir tank. Flattening the gravel base. Adding a layer of stones to the base. Pouring the concrete base onto the prepared gravel and stone layers. Finishing the concrete base. Adding re-bar to the base to provide reinforcement. Preparing the rebar for the reservoir tank wall. Constructiong the inside wall of the reservoir tank mould. The completed inside wall of the reservoir tank mould with re-bar around the outside.. Fitting the bottom layer of the mould’s outer wall. Mixing the concrete for the walls. Filling the bottom layer of the mould with concrete. Filling the top layer of the mould with concrete. The Filled Mould. The view inside the mould showing the exit pipe. Removing the outside sections of the mould. The outside of the tank wall once the mould is removed. Plastering the inside walls of the tank. Plastering the outside walls of the...

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Buried And Semi-Submerged Water Tanks

Posted on Oct 25, 2011

Short technical brief on building buried and semi-submerged water tanks. This Technical Brief outlines the advantages and disadvantages of using buried and semi-submerged tanks for collecting and storing water. It also examines some of the design features and construction procedures. You can read the whole of this document as a PDF file (316...

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Ferrocement Water Tanks

Posted on Oct 25, 2011

Short technical brief on building ferrocement tanks. Ferrocement consists of a cement-rich mortar reinforced with layers of wire mesh, sometimes with additional plain wire reinforcement for added strength. Tanks made of ferrocement are used in many countries for the collection and storage of water for drinking, washing, for animal use and irrigation. You can read the whole of this document as a PDF file...

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