Injection Grouts for the Re-Attachment of Architectural Surfaces with Historic Value—Measures to Improve the Properties of Hydrated Lime Grouts in Slovenia

In the described studies with the aim of optimizing hydrated lime grout composition, the first measure was to reduce the water content of the grout using a highly efficient polycarboxylate ether-based superplasticizer, whereas the second measure was to increase the content of the inert limestone filler with an adequate grain size distribution. In this way, an attempt was made to achieve the best possible volume stability and strength properties of the hydrated lime grout, while continuing to fulfill the other necessary requirements regarding non-structural grouting works which are reported in the literature.

The results of the tests showed that a non-structural grout consisting of 1 volume part of hydrated lime CL 90-S and 3 volume parts of inert limestone filler, with 0.5% of the polycarboxylate ether based superplasticizer, fulfilled most of the established requirements, so that it is thus potentially suitable for re-attachment interventions on architectural surfaces.     

On the Ancient Parliament and Castle of Acton Burnell

The remains of an iron dagger within an iron sheath were found in 1998 at Castlethorpe, Buckinghamshire: the only one recorded in Britain and Ireland. Their typological characteristics are those of early iron-age examples, made somewhere between 600 and 400 B.C. A unique design feature and the circumstances of its deposition are discussed.     

The Royal Councils of Worcester

The possible existence of a Roman signal station at Whitby has a significant impact upon the study of the Roman defensive system of the North Yorkshire coast and our understanding of the Anglo-Saxon ecclesiastical topography of the area. Whitby lies at the mouth of the River Esk and its associated harbour on the North Yorkshire coast, amidst an intervisible chain of five known signal stations, but is perhaps best known for its Anglo-Saxon monastery founded by the Northumbrian king Oswy in A.D. 657. No absolute archaeological evidence of a signal station at Whitby exists, but the toponym suggests that the site had an association with a signal station or watchtower. It is clear that the existing stations were designed to function as a cohesive system, given their similar form and contemporary dates: communication and intervisibility were therefore essential aspects of this defensive network. Despite this, the stations to the north and south of Whitby—those at Goldsborough and Ravenscar respectively—are not intervisible. A station positioned at Whitby would effectively close this gap in the system.

Attempting to reconcile the near complete absence of archaeological remains with the place-name and geographical evidence, this paper uses geologically determined erosion rates to examine the possibility that such a station existed on the more than three hundred metres of coastal land that has eroded since the Roman period. In doing so it addresses the extent to which archaeologists can reconstruct and work with an ancient coastline on a local scale. Having established the probability of a ‘lost’ station, the paper discusses the results of a GIS viewshed application which address the feasibility of such a station's intervisibility from its neighbouring station to the south. The concluding sections investigate the stations' possible form.