Akademik Veri Yönetim Sistemi
4th International Ankara Multidisiplinary Studies Congress, Ankara, Türkiye, 29 - 31 Temmuz 2022, ss.640-647
Engineering cementitious composites (ECC) are gaining in popularity due to their enhanced mechanical
and durability properties with superior strain capacity. However, the high cost in the production of ECC
caused by the inclusion of ultra fine silica sand has limited its application. Therefore, this study aimed
to design a cheaper ECC by fully or partially replacement of silica sand (SS) with limestone powder
(LSP). Within this scope, three ECC specimens having water-to-cementitious materials ratio of 0.26
were designed and SS was replaced by LSP with the proportions of 0%, 50% and 100% by mass. The
effects of use of LSP as full and partial replacement of SS on the mechanical properties as well as rapid
chloride-ion permeability (RCIP) of ECC were investigated. The compressive strength, flexural strength
and fracture toughness were examined to assess the mechanical properties of ECC. The results
demonstrated that the increased LSP replacement rate of SS caused a slight decrease in compressive and
flexural strengths while it caused an improvement in the fracture toughness of ECC specimens. Besides,
it can be inferred from RCIP test results that the use of LSP instead of SS reduced the chloride-ion
permeability of ECC. As for correlation between the RCIP and fracture toughness, a significant power
relationship with the R-squared value of 0.9554 was found. Finally, it can be emphasized from this study
that the use of LSP as a partial replacement of SS can be an alternative to produce more economical and
sustainable ECC.