Study on Combined Effects of Fly Ash, GGBS and Advanced Nanomaterials on the Properties of SCC

This paper presents comparative experimental study on rheological, strength, and durability properties of self-compacting concrete (SCC) using fly ash, GGBS and different nanomaterials. For the test, a fraction of Portland cement is replaced by fly ash and GGBS as 20% and 30% by weight (wt) of cement in all mixes, respectively. Now for the fly ash-GGBS-based SCC incorporated with different nanomaterials at different percentages by wt of cement, the nanomaterials used in the study are nano-silica (NS), nano-alumina (NA) and graphene oxide (GO). Similar percentages (1.5–9% by wt of cement with increment of 1.5%) of NS and NA were used in SCC, whereas GO used as 0.02–0.1% with increment of 0.02% by wt of cement. The rheological and mechanical properties are tested, and the results indicated that by the replacement of cement by nanomaterials the fresh properties of SCC start decreasing especially addition of NS and NA, whereas addition of graphene oxide does not show much effect on fresh properties of SCC. Hardened properties improved in strength by adding nanomaterials than that of the control concrete mix (100% cement). Further durability tests such as water permeability test and accelerated resistance corrosion test (ARCT) were conducted.