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A platform for research: civil engineering, architecture and urbanism
A practical classification of rocks for engineering purposes
Summary A new method of classification of rocks is proposed based on rock material properties determined in the laboratory. Uniaxial compressive strength is plotted against the ratio of tangent elastic modulus to Poisson's ratio. For unweathered rocks this gives the horizontal strain of the rock at failure. It is convenient to plot the experimental values on log-log paper in order to assess the mean value. Weathering not only decreases strength but also the ratio of elastic modulus to Poisson's ratio. If, for example, the experimental results from a granite weathered to different grades is similarly plotted the relationship is linear. From the graph the horizontal strain at failure can be determined for any rock strength in the weathering suite. The slope of the curve for any particular rock is constant, so that for each rock there is a unique linear equation. Dynamic properties of rocks can be plotted on the same graph, as can field data. For classification purposes both the strength and elastic modulus to Poisson's ratio scales can be divided into classes.
A practical classification of rocks for engineering purposes
Summary A new method of classification of rocks is proposed based on rock material properties determined in the laboratory. Uniaxial compressive strength is plotted against the ratio of tangent elastic modulus to Poisson's ratio. For unweathered rocks this gives the horizontal strain of the rock at failure. It is convenient to plot the experimental values on log-log paper in order to assess the mean value. Weathering not only decreases strength but also the ratio of elastic modulus to Poisson's ratio. If, for example, the experimental results from a granite weathered to different grades is similarly plotted the relationship is linear. From the graph the horizontal strain at failure can be determined for any rock strength in the weathering suite. The slope of the curve for any particular rock is constant, so that for each rock there is a unique linear equation. Dynamic properties of rocks can be plotted on the same graph, as can field data. For classification purposes both the strength and elastic modulus to Poisson's ratio scales can be divided into classes.
A practical classification of rocks for engineering purposes
Türk, Necdet (author) / Dearman, W. R. (author)
1983
Article (Journal)
English
A practical classification of rocks for engineering purposes
| Online Contents | 1983
The description and classification of weathered rocks for engineering purposes
British Library Online Contents | 1995
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