Published Paper Details:

High Performance Concrete (HPC) is widely used around the world for the design of tall buildings, long-distance bridges, gigantic buildings, and for the repair and expansion of existing structures. Consequently, the increasing use of high-strength concrete increases the use of Portland cement. In addition, an increase in cement consumption in the concrete industry leads to an increase in CO2 emissions, which contributes to global warming. Therefore, a significant reduction in the use of cement by replacing part of the cement with mineral additives would be beneficial for the climate. The aim of this experimental study is to identify the effect of the combined use of nano-silica (NS) and fly ash (FA) on the strength properties of concrete. Fly ash and nano-silica are used as a partial replacement for cement. In this experimental study, cement is partially replaced by 30% fly ash and nano-silica 1%, 2%, 3% and 4% by weight. The effect of the combined use of fly ash and nano-silica on the compressive strength, split tensile strength, flexural strength, water absorption and acid resistance of concrete with high performance characteristics (grade M60) is investigated. The test results of HPC concrete prepared using a combination of different proportions of fly ash and nano-silica are compared with test results for controlled concrete.