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International Journal of Concrete Structures and Materials

Table 1 Chemical and physical properties of Portland cement and RHA (wt.%).

From: An Artificial Neural Networks Model for Predicting Permeability Properties of Nano Silica–Rice Husk Ash Ternary Blended Concrete

Chemical properties

Material

SiO2

Al2O3

Fe2O3

CaO

MgO

SO3

Na2O

K2O

Loss on ignition

Cement

21.89

5.3

3.34

53.27

6.45

3.67

0.18

0.98

3.21

RHA

87.86

0.68

0.93

1.30

0.35

–

0.12

2.37

–

Physical properties

Material

Specific gravity (g/cm3)

Specific surface (BET) (m2/g)

Specific surface (Blain) (m2/kg)

Cement

1.7

–

314

RHA U series

–

36.47

–

  1. RHA rice husk ash, U series ultra fine RHA blended concrete.
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