International Journal of Concrete Structures and Materials

Table 1 Chemical composition of Portland cement.

From: Carbonation Model and Prediction of Polyvinyl Alcohol Fiber Concrete with Fiber Length and Content Effects

Composition	SiO₂	Al₂O₃	Fe₂O₃	CaO	MgO	R₂O	LOI
Content /%	20.6	5.0	3.4	63.3	1.3	0.5	1.76

LOI is the loss on ignition, namely the percentage of weight lost after ignition between 1000 and 1100 °C

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