4355 Haroldsen Dr.
Idaho Falls, ID 83401
Phone 208-522-5520
Fax 208-522-5344
© Copyright 2004, 2008
DOMTEC International, L.L.C.
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| Before dome construction can begin, geotechnical engineering must be completed and any structures such as sub grade tunnels should be finished. Construction of the dome's foundation follows, usually consisting of a simple ring beam spread footing. DOMTEC® International domes are monolithic, and thus able to withstand substantial amounts of differential soil settlement. As a result, concrete domes can often be constructed on sites considered too unstable for traditional silos. |  |
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Dome construction
begins as a fabric form is attached to the ring
beam foundation and inflated over the top of
construction equipment and stockpiled materials
used to build the dome. Large blowers run
continuously to maintain the proper shape until
enough materials are in place to make the dome
self supporting. The inflatable form consists of
heavy duty, single ply roofing material
containing UV inhibitors. In addition to serving
as the form during construction, the membrane
remains in place as the dome's finished
roof.  |
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| After the air form is inflated, polyurethane foam is sprayed to the interior surface, making the form semi rigid. Special fasteners are embedded in the foam which allow attachment of initial reinforcement bars. Frames to accommodate doors and other openings are installed. Next, additional reinforcement bars are tied in place as required by the structural engineering. With the structural rebars in place, skilled DOMTEC® International nozzlemen spray shotcrete to properly embed the rebars and achieve the designed concrete thickness. Proper placement of the shotcrete is the most critical part of dome construction. Inasmuch as shotcreting a dome is different from other types of shotcrete applications only qualified nozzlemen are employed. |  |
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The reinforcing
requirements and shotcrete thickness are
pre-engineered to withstand the anticipated
loads, including the pressure created by stacking
materials high against the dome's walls.
As the dome nears completion, work can begin on entryways and other openings. Each dome includes at least one drive in doorway. Concrete curbs are poured to accommodate a head house and dust filter. |
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