Abstract
In this study, the effect of limewater on strength assessments and percentage of water absorption of zinc cobaltate (ZnCo2O4) nanoparticles incorporated porous concrete has been investigated. Portland cement was partially replaced by ZnCo2O4 nanoparticles with the average particle size of 50 nm. The results indicated that the incorporation of nanoparticles could transform concrete with improved strength and water permeability when the specimens are cured in saturated water. The strength of concrete specimens without nanoparticles are relatively low compared to the specimen with ZnCo2O4 nanoparticles. The results show that the strengthening of nanoparticles incorporated specimens resulted from improved permeability together with high strength. Microstructure and morphology of the specimen after compressing test was observed by scanning electron microscopy (SEM). In addition, ZnCo2O4 nanoparticles are able to act as nanofillers and recovered the pore structure of the specimens by decreasing damaging pores.
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