Table 1 Chemical composition of portland cement (PC).

From: Chitosan derived from shrimp shells functionalizes dendritic fibrous nanosilica to improve concrete’s early properties and durability

Substance

LOI

Fe2O3

K2O

CaO

SiO2

SO3

Na2O

MgO

Al2O3

Percentage (%)

3.67

3.49

1.03

54.22

22.03

3.52

0.18

6.31

5.71

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