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The current study is carried out to investigate effect of some nanomaterials on the properties of concrete, experimental program included nanoparticles of both calcium carbonates (CaCO3) and Kaoline (K) with different percentages. The nano-CaCO3 was added at percentages 1, 2, 3, 4 and 5% as a partial mass replacement for cement. NK was added at percentages 5, 6, 7, 8, 9 and 10%. The experiment results showed that the addition of these nanomaterials did not reduce the flowability of concrete significantly, but the early compressive strength of concrete was both improved to some extent when the dosage of both was suitable. The optimum amounts of nano calcium carbonates and nanokaolin are 1% and 7% respectively. Results of microstructure analysis were in agreement with the results of strength tests.

COMPARISON BETWEEN THE EFFECT OF ADDITION OF NANO-CALCIUM CARBONATE AND NANO-KAOLINE ON DEVELOPING THE PROPERTIES OF REINFORCED CONCRETE