Table 3 The chemical composition of the used expansive mineral compounds.

From: Synergistic effect of cement mortar types and encapsulated healing agents on crack healing in sustained notched concrete beams subjected to flexural loads

Oxide composition

Percent by weight (%) *

Bentonite

MgO

CaO

Silicon oxide (SiO2)

61.03

0.89

0.88

Aluminum oxide (Al2O3)

14.59

0.22

0.12

Ferric oxide (Fe2O3)

2.09

0.48

0.07

Calcium oxide (CaO)

0.77

0.90

94.0

Magnesium oxide (MgO)

2.22

95.7

0.50

Sulfur trioxide (SO3)

0.37

–

0.08

Calcium carbonate (CaCO3)

–

–

3.7

Potassium oxide (K2O)

0.76

–

–

Sodium oxide (Na2O)

2.04

–

–

Chloride (CL-)

0.46

–

–

Titanium dioxide (TiO2)

0.22

–

–

Barium oxide (BaO)

0.11

–

–

Loss on ignition (L.O.I)

13.2

1.76

0.60

  1. *By the manufacturer’s datasheet.
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