Akademik Veri Yönetim Sistemi
5. Bilsel Internatıonal Sumela Scientific Researches Congress, Trabzon, Türkiye, 16 - 17 Kasım 2024, ss.554-563, (Tam Metin Bildiri)
This study is about the hydrated lime (HL)-based self-compacting concrete (SCC) blended with silica fume
(SF), ground granulated blast furnace slag (BFS), and fly ash (FA) as binary, ternary and quaternary, with the
40 wt% HL content. The HL was binary blended with SF and BFS seperately, ternary blended with both SF and
BFS and also quaternary blended with SF, BFS and FA. Besides, among these designed HL-based SCC
mixtures, those with higher compressive strength were also activated with sodium silicate. It was used as 5 wt%
and 6 wt% in the two selected mixtures. Thus, in total, six mixtures were designed in the current study. The
workability and strength development of the designed HL-based SCC was examined. The results indicated that
among the HL-based SCC mixtures without sodium silicate, the binary blend of SF with HL had the lowest
workability but the highest early and compressive strength. However, the use of FA into quaternary blend
significantly enhanced the workability of HL-based SCC, although it decreased the compressive strength values
compared to the ternary blends of SF and BFS. As another finding, it was found that the addition of sodium
silicate into HL-based SCC significantly decreased the workability of all the designed mixtures, while it
increased the strength values. In fact, the use of 6 wt% sodium silicate in the binary blend of SF and HL
enhanced the early and standard compressive strength by about 83.5% and 18.86%, respectively. Therefore, it
can be emphasized that the use of SF as a binary blend or SF and BFS as a ternary blend into HL-based SCC
can be a good alternative to cement-based SCC in terms of workability and strength development. Also, it is
worth mentioning that SF played an important role in the alkaline activated/alkaline free HL collaboration for
cementless concrete.