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Table 1 Chemical composition of the portland cement (wt.%)

From: The Influence of Nano-Fe₃O₄ on the Microstructure and Mechanical Properties of Cementitious Composites

Material	SiO₂	Al₂O₃	Fe₂O₃	CaO	MgO	SO₃	Na₂O	K₂O	Cl⁻	Loss on ignition
CEM I 42.5R	19.5	4.9	2.9	63.3	1.3	2.8	0.1	0.9	0.06	3.5

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