Özet:

In the presented study, the partial use of Glass Powder (GP) and Ground Granulated Blast Furnace Slag (GGBFS) in place of cement on Ultra High Performance Concrete (UHPC) was investigated in terms of concrete compressive strength. In this context, the total of 16 UHPC mixtures with single, double and triple binder systems were produced by the independence and dual-uses of GP and GGBFS of 4% and 8% by volume as well as additive-free control mixture. The compressive strengths of cube specimens for each mixture were determined for 7, 14, 28, 56 and 90 days by considering with and without steel fiber and steam curing. Based on the average compressive strengths related to the test specimens for each concrete age, the impacts of studied additive materials as well as contribution of the steel fiber and steam curing on the compressive strength of UHPC were discussed by referencing the results of control specimens. The test results showed that while the compressive strengths were decreasing trend as the GP amount increases at all concrete ages, relative differences were very small at 28 day and beyond. However, regardless of the GGBFS amount in the mixture, the compressive strengths of 90 day were very close the control specimens. It can be deduced that the target compressive strengths of UHPC can be obtained with the partial uses of GP and/or GGBFS by reducing the amount of cement in the mixture in order to obtain eco-friendlier and more economical concrete. It should be noted that the effects of these additive materials on the compressive strength become more apparent with the inclusion of steel fiber to the UHPC mixture and the application of steam curing.

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