Conservation of ruins by John Ashurst

By John Ashurst

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8 Distress cracking on clay subgrades. It follows from all of the above that an adequate blanket of topsoil and silt should be maintained as far as possible. Trees, however pose a major threat to stability of ruins and standing structures alike, and large, vigorous, deciduous trees particularly so. 8 shows the dramatic ground movements, which can be caused by the introduction of a large elm tree. 10 both show a simplified relationship between vertical movement and the tree height-to-distance ratio.

Ancient clays of saltwater deposit do not align as evenly as those laid down in freshwater lakes, as a result of ionic interaction. 5 ments. 6 Deep in situ residual clay weathering showing residual basalt boulders. 7 Clay particle orientation. 8 Distress cracking on clay subgrades. It follows from all of the above that an adequate blanket of topsoil and silt should be maintained as far as possible. Trees, however pose a major threat to stability of ruins and standing structures alike, and large, vigorous, deciduous trees particularly so.

75 m thick. The internal space was covered with a stone vault capped with lightweight lime concrete and a pitched tiled roof. The internal surfaces were covered in plaster and richly painted. The floor was covered with limestone, ceramic and marble mosaic. The town and its temple were abandoned following a minor eruption of the nearby volcano and the silting up of the waterway which brought trade to the town. Short story xxxiii 2 Phase one deterioration After a few years of disuse roof tiles become loose and fall.

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