Photographer's Note

As I said in yesterdays note many of the buildings in the mining district Bergslagen were built in a masonry of slag from the metallurgy process. When the ore is melted to make a metal the other substances are poured out as reject material. In Swedish we call that "slagg" which in my dictionary translates to "slag".

The slag is mostly a porous rocklike stone but often glasslike pieces in bright blue or green colors are found. You can see some examples of both in this wall.

The picture is taken at the same ruin as yesterdays post but on a still standing high wall that was behind me when taking that picture.

I framed a detail of the arch that reinforces the wall over an opening for a door. As allways when working with masonry you have to make sure that all forces are carried by compression and one way of doing that is to form arches over windows and doors. Without these arches a part of the wall over the opening will crack and fall down. You can see the same thing on facades of brick or stone buildings everywhere in the world.

I found a particular difference here that made me curious as an engineer. The arch is made of slag but the slightly wider opening next to it has an arch of bricks. It makes me wonder if that was just for decorative purposes or if they did not trust the slag when pressure got higher. An when I think of it, it is quite usual that the arches over openings are made with bricks or granite in the slag houses.

Cool-ice, cgrindahl, jrj, Galeota, jiherka, avigur_11, mhamilton has marked this note useful

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Additional Photos by Ebbe Rozel (Ebbe) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2539 W: 732 N: 1910] (9625)
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