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Table 3 Effect of CaO on the durability and length change of AAMs

From: A Concise on the Effect of Calcium Oxide on the Properties of Alkali-Activated Materials: A Manual for Civil Engineers

Reference

Precursor

Activator

CaO (%)

Type

Curing condition

Effect

Ju et al., (2020)

Slag

KOH and K2SiO3

3

Mortar

-10 and 20 °C

-Decreased total porosity

Rashad and Gharieb, (2021)

FA

NaOH and sodium silicate

2.5, 5 and 7.5

Paste

Room

-Decreased water absorption and total porosity

Temuujin et al., (2009)

FA

NaOH and sodium silicate

1, 2 and 3

Paste

20

-Increased apparent porosity

 

FA

NaOH and sodium silicate

1 and 2

Paste

70 for 24 h

-Increased apparent porosity

 

FA

NaOH and sodium silicate

3

Paste

70 for 24 h

-Decreased apparent porosity

Chen and Ye, (2022)

Slag

sodium carbonate

2.5 and 5

Paste

NA

-Decreased chloride diffusion

Gharieb and Rashad, (2022)

Slag

NaOH and sodium silicate

2.5, 5 and 10

Paste

Room

-Increased resistivity of wetting/drying cycles and acid resistance

Zheng et al., (2021)

Slag

NaOH

3–12

Mortar

20 ± 0.3

-Decreased autogenous shrinkage

Dişçi and Polat, (2022)

Perlite

NaOH and anhydrous sodium silicate

1, 2 and 3

Concrete

90 °C for 72 h

-Increased length change