EVANSVILLE, Ind. (AP) — An Idaho company that has built nearly 600 monolithic concrete structures around the world is tackling one of its smallest projects with a new immersive planetarium at the Evansville Museum.
Industrial-strength blowers will inflate a two-ton fabric membrane Tuesday that will form the shape of the planetarium's dome.
Tom Dixon of Dome Technology tells the Evansville Courier & Press (http://bit.ly/ZKgmyG ) crews will spray polyurethane foam inside the dome balloon and add a skeleton of steel rebar once it hardens. Then they'll spray 5 inches of concrete slurry known as shotcrete inside the skeleton.
The process is expected to take about five weeks.
The planetarium is part of the final phase of a $14.1 million expansion begun several years ago. The work is expected to be complete in January.
Information from: Evansville Courier & Press, http://www.courierpress.com
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