A Restoration Drama (Sulfur) VIDEO/DVD, St. Servatius Basilica in Maastricht is one of Holland’s oldest churches; it has been restored and redesigned several times over the years. During the 20th century, the interior began to decay: the church was built of a soft stone that absorbs water easily; water had entered the stone and salt had built up on or just below the surface of the stone. One of these salts was calcium sulfate, which expands in hydrate form, so that it expanded every time fresh water was absorbed. As a result, the stone began to crumble. To restore the church, the calcium sulfate had to be removed, but calcium sulfate is not very soluble and therefore difficult to remove. This program shows the fascinating combination of steps necessary to solve the problem, remove the sulfate, and save the church.


			A Restoration Drama (Sulfur)

St. Servatius Basilica in Maastricht is one of Holland’s oldest churches; it has been restored and redesigned several times over the years. During the 20th century, the interior began to decay: the church was built of a soft stone that absorbs water easily; water had entered the stone and salt had built up on or just below the surface of the stone. One of these salts was calcium sulfate, which expands in hydrate form, so that it expanded every time fresh water was absorbed. As a result, the stone began to crumble. To restore the church, the calcium sulfate had to be removed, but calcium sulfate is not very soluble and therefore difficult to remove. This program shows the fascinating combination of steps necessary to solve the problem, remove the sulfate, and save the church.

30 minutes
Copyright date: ©1992

ORDER CODE: FFMBVL3062V
VHS VIDEO

ORDER CODE: FFMBVL3062DVD
DVD