Properties of High Strength Concrete Incorporating Colloidal Nano-Al2O3

摘要

Nano technology improves the properties or develope totally new properties of material. Addition of ultra-fine particles to the cement mortar or concrete, fill the voids between cement particles & make it dense, compact which results in improved properties. In this paper, work consists of addition of 1%, 2%, 3% & 4% of colloidal nano alumina particles by wt. of cement to the concrete mixture and comparison of it with normal control concrete (concrete without colloidal nano alumina). For this, M60 grade mix design was selected with w/c ratio 0.26 and constant dose of superplastisizer 1%. In this work, mechanical properties are investigated through compression, flexural and split tensile strength after 28 days of curing. Results of this study showed that colloidal Al2O3 nano particles are very effective in improvement of mechanical properties of concrete.