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Quality variations in whin sill aggregates from Northumberland, England
Summary The Whin Sill is a dolerite intrusion with extensive outcrops in North East England. Quarries in the sill, provide the bulk of the crushed rock aggregates in the region suitable for roadstone. The dolerite is generally of high strength and little affected by weathering and thus yields high quality aggregates. At some quarries, however, dolerite of poor quality, locally known as “Woodhead”, is found. The “Woodhead” material differs from the normal dolerite is having a distinctive colour, lower strength and higher porosity. It can be shown that the material is produced by hydrothermal alterations related to calcite veining. Inclusion of Woodhead material in aggregates from one quarry lead to their rejection by a Local Authority and, as it proved impossible to separate the poorer material, the quarry closed. Quality variations have been determined by a range of standard tests. Test results can be related to petrographic indices determined by quantitative thin-section analyses.
Quality variations in whin sill aggregates from Northumberland, England
Summary The Whin Sill is a dolerite intrusion with extensive outcrops in North East England. Quarries in the sill, provide the bulk of the crushed rock aggregates in the region suitable for roadstone. The dolerite is generally of high strength and little affected by weathering and thus yields high quality aggregates. At some quarries, however, dolerite of poor quality, locally known as “Woodhead”, is found. The “Woodhead” material differs from the normal dolerite is having a distinctive colour, lower strength and higher porosity. It can be shown that the material is produced by hydrothermal alterations related to calcite veining. Inclusion of Woodhead material in aggregates from one quarry lead to their rejection by a Local Authority and, as it proved impossible to separate the poorer material, the quarry closed. Quality variations have been determined by a range of standard tests. Test results can be related to petrographic indices determined by quantitative thin-section analyses.
Quality variations in whin sill aggregates from Northumberland, England
Dearman, W. R. (author) / Irfan, Y. (author) / Money, M. S. (author) / Turk, N. (author) / Hussen, T. I. (author)
1984
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
Quality variations in whin sill aggregates from Northumberland, England
| Online Contents | 1984
Location of concealed whin dyke by geophysical surveying
| Engineering Index Backfile | 1933