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EXPERIMENTAL INVESTIGATION OF SELF-COMPACTING CONCRETE BEAMS WITH NANO MATERIALS ADDITIVES

Hamdy G.A., Ahmed H.H., Barakat A.Y., Mostafa M.A.

Abstract


Self-compacting concrete (SSC) is a concrete that flows and consolidates under its own weight without additional compaction; it has special mix design which provides high flow ability and high segregation resistance. This paper presents an experimental program that investigates the structural behavior of SCC beams with additives of Nano-silica (Nano-SiO2) and Nano manganese ferrite (Nano-MnFe3O4). Ten SCC mixes were prepared containing Nano-SiO2 additives with three percentages 1%, 2% and 3% of cement weight, and Nano-MnFe3O4 with percentages 0.3%, 0.5% and 0.7%. Laboratory tests were performed to determine the fresh properties (workability, passing ability and segregation resistance), mechanical properties (compressive strength, splitting tensile strength and flexural strength), and durability (water permeability and chloride penetration). The experimental results show that using Nano additives with 25% cement replacement by fly ash improved the mechanical and durability properties of SCC. Mixes with the optimum percentage were used to cast reinforced concrete beams which were tested in bending until failure in order to investigate the effect of Nano materials additives on the flexural performance.

Keywords


Self-compacting concrete; additives; Nano-silica; Nano-manganese ferrite; fresh properties; beams; flexure; durability

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DOI: http://dx.doi.org/10.22213/2410-9304-2019-3-20-32

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Copyright (c) 2019 Хамди Г.А., Ахмед Х.Х., Баракат А.Й., Мостафа М.А.

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This work is licensed under a Creative Commons Attribution 4.0 International License.

ISSN 1813-7911