Abstract
In this paper, the effects of weathering on durability and deformability properties for three different types of granitoid rocks were investigated. Five weathering grades ranging from fresh to completely weathered rocks were considered for each rock type. Deformability has been evaluated based on failure strain, tangent and secant modulus. For measuring these parameters, at least five uniaxial compressive strength tests with axial strain recorded were conducted on each weathering grade. To assess the weathering effect on the durability behavior of these rocks, a slake durability test was performed up to 40 cycles. The obtained results indicated that uniaxial compressive strength and elastic modulus dramatically decrease with increasing weathering grade. After moderately weathering grade, remarkable damage was observed in the structure and fabric of considered rocks. The results from slake durability tests showed that the slake durability index for each weathering grade has a certain changes trend which can be used in determination of the weathering grade and the long-term durability assessment. Moreover, the results showed that for evaluation of the long-term durability of the mentioned rock types, at least eight cycles should be considered, while two cycles were sufficient for estimation of weathering grade.
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Acknowledgements
This work was supported by the Bu-Ali Sina University. The authors are grateful to Mr. H. Farhadi and Mr. E. Bazvand for their help during laboratory works.
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Momeni, A., Hashemi, S.S., Khanlari, G.R. et al. The effect of weathering on durability and deformability properties of granitoid rocks. Bull Eng Geol Environ 76, 1037–1049 (2017). https://doi.org/10.1007/s10064-016-0999-7
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DOI: https://doi.org/10.1007/s10064-016-0999-7