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International Journal of Concrete Structures and Materials

Table 2 Composition of OPC by mass using XRF.

From: Strength and Some Durability Properties of Concrete Containing Rice Husk Ash Produced in a Charcoal Incinerator at Low Specific Surface

SiO2

Al2O3

Fe2O3

CaO

MgO

SO3

K2O

24.79 %

6.35 %

0.92 %

58.50 %

2.87 %

4.91 %

0.80 %

Na2O

Mn2O3

P2O5

TiO2

Cl−

SR

AR

0.65 %

0.0 %

0.15 %

0.06 %

0 %

3.41

6.88

  1. SR: silica ratio = SiO2/(Al2O3+Fe2O3), AR = alumina ratio = Al2O3/Fe2O3.
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