Research Information System
25th International Mining Congress of Turkey: New Trends in Mining, IMCET 2017, Antalya, Turkey, 11 - 14 April 2017, pp.381-385
The Slake Durability Index (SDI) test is widely used to determine the disintegration characteristic of the weak, and clay-bearing rocks in geo-engineering problems. The main purpose of this study is to assess the changes of SDI values of weathering and massive white tuffs on sphere and rounded test samples. For this purpose, white tuff block samples were collected from white tuff quarry in Derbent village, Eskişehir, Turkey. Three different sets for assessment of influence of weathering were prepared as the test samples which had sphere and rounded shapes. Index values were determined for the three different sets subjected to the SDI test for 12 cycles. The SDI values at the end of twelve cycles were found to be 72.48 % for massive sphere tuff sample, 69.03 % for rounded sample, and 64.67 % for weathering sphere tuff sample. When the SDI values determined from multiple-cycle tests were compared with massive and weathering tuffs, the SDI value of massive sphere test sample set was found to be higher than weathering and rounded sample test samples. Although the SDI value of weathering sphere test sample set was higher than rounded test sample set up to 7 cycles, the SDI values of weathering sphere test sample after 7 cycles were rapidly decreased. As a result, it is emphasized that two-cycle conventional SDI test did not appear to offer an acceptable indication of the durability of weathering white tuff rocks when compared with the SDI values for multiple-cycle test.