Influence of silane treated nano eggshell powder on mechanical and durability properties of concrete

Abstract In order to test concrete’s sustainability, this study substitutes nano eggshell powder (nESP) for cement in a silane-treated environment. The results showed that the silane-treated concrete mixtures outperformed the untreated ones in terms of performance. nESP was replaced by 5 to 20% with in cement of 5% along with constant replacement of 30% fly ash by weight of cement. It was found that partial cement substitution with nESP up to 10% produced a sample with greater strength than the control sample. The filling and reinforcing properties of the nESP and the pozzolanic effect of flyash after silane treatment produced favorable results when mechanical strength was evaluated. The increased electrical resistance with age may be caused by the increased hydration products and excess CSH gel formation induced by the pozzolanic action of the fly ash in concrete.