Akademik Veri Yönetim Sistemi
24th INTERNATIONAL MINING CONGRESS OF TURKEY, Antalya, Türkiye, 14 - 17 Nisan 2015, ss.469-480, (Tam Metin Bildiri)
This paper presents the effects of placement conditions on strength properties of cemented paste backfill CPB cast in different size moulds (D x H = 10 x 20 cm, 7.5 x 15 cm, and 5 x 10 cm) and prepared at binder contents of 3 wt%, 4.5 wt%, and 7 wt%. CPB samples were subjected to four placement conditions: capped-drained C-D; uncapped-drained U-D; capped-undrained C-U; and uncapped-undrained U-U. Results show that the highest strengths were obtained from C-D samples, followed by U-D, C-U and U-U samples, respectively. This may be explained by the drainage of free water within CPB at early ages, which offers higher strengths. The CPB's strength increased with a decrease in mould size in all cases for all the samples. The moulds 5 x 10 cm gave the best strengths due to a more homogenous matrix and the decreased number of micro-cracks in grains.