Field characterisation of weathered Ankara andesites

Date

1997-3

Author

Paşamehmetoğlu, A. Günhan

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This paper presents held and some index properties of weathered Ankara andesites, carried out over a period of 4 years. Ankara andesites are distributed widely around the city of Ankara, on which numerous important structures have been founded. Thus, the weathering characteristics of Ankara andesites, both from the engineering geological and the rock mechanics points of view are important. The held work involved assessment of the rock mass weathering grades, conduction of simple field tests, Schmidt hammer and point load tests on the rock materials, characterisation of discontinuities, and collection of representative samples from each weathering grade for laboratory testing. The relationship between the experimentally determined parameters and quantitative engineering geological descriptions provided a simple geological method for the assessment of the design parameters and mapping the distribution of mass weathering grades. As a result of the evaluation, an idealized weathering profile and the scale of rock mass weathering grades together with their range of thicknesses were proposed. Some index tests, such as effective porosity, Schmidt hammer value (SHV), point load strength and seismic velocity, provided good relations with the degree of weathering.

Subject Keywords

Ankara andesites, Weathered ankara andesites, Field characterisation

URI

https://hdl.handle.net/11511/28529

Journal

Engineering Geology

DOI

https://doi.org/10.1016/s0013-7952(96)00002-6

Collections

Department of Mining Engineering, Article

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Citation Formats

A. G. Paşamehmetoğlu, “Field characterisation of weathered Ankara andesites,” Engineering Geology, pp. 1–17, 1997, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/28529.