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http://hdl.handle.net/2074/757
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| Title: | Weathering effects on the strength and deformational behaviour of crystalline rocks under uniaxial compression state |
| Authors: | Gupta, A S
Rao, K Seshagiri |
| Keywords: | Deformability
India
Uniaxial compressive strength
Weathered rocks
X-ray diffraction |
| Issue Date: | 2000 |
| Citation: | Engineering Geology, 56(3-4), 257–274 |
| Abstract: | Uniaxial compression tests were performed on different categories of weathering of three lithological units:Malanjkhand granite; Nagpur basalt; and Delhi quartzite, occurring in central and northern parts of India. The deformational behaviour is studied in terms of variation in tangent modulus (Et50) and initial modulus (Ei) due to weathering. The power relationship between uniaxial compressive strength (sc) and Et50 shows strong correspondence for weathering sequence of common rock types. This relationship has been established by regression analysis and
significant correlation parameter (coeYcient of determination, r2=0.87) for crystalline rocks. It is shown that there is a systematic decrease in stiVness ratio, that is, ratio of tangent modulus and uniaxial compressive strength with increased
weathering state. Comparison of Et50 and Ei values has shown that Et50 decreases more gradually than Ei, and reduction is more drastic for Ei values with an increased degree of weathering in a... |
| URI: | http://eprint.iitd.ac.in/dspace/handle/2074/757 |
| Appears in Collections: | Civil Engineering
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