Internally Sealed Concrete:  Stored Earth Heat, 1977

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Experience the American Journey through our country’s visual heritage in this historical recording provided by the National Archives of the United States. This color film from the Federal Highway Administration investigates the problem of de-icing agents, such as salt, that are corrosive in nature. It presents a new scientific technique which uses wax beads. It discusses wax beads mixed into the concrete as a possible solution, and shows the production of the beads, how they are mixed into the concrete, and demonstrates the heating methods used to melt the wax with heating blankets. This historical recording from the National Archives may contain variations in audio and video quality based on the limitations of the original source material. The content summary for this DVD is adapted from an historical description provided by the government agency or donor at the time of production release.

When sold by, this product will be manufactured on demand using DVD-R recordable media.’s standard return policy will apply.

Immobilienmakler Heidelberg

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