Skip to main content

Table 1 Compressive strength and porosity values of groups of specimens, segregated by Batch, treatment and time framings

From: Time impacts of treating pervious concrete with sodium bicarbonate

Batch and Treatment

Age Descriptiona (months)

# of Days Between Casting and Treatment (start)

# of Days Between Treatment (end) and Testing

Average Porosity (%) ± Standard Deviation

Average Compressive Strength (MPa) ± Standard Deviation

Batch a

WATER

2 M treat

0.5 M test

64

13

25.2 ± 0.5

9.8 ± 2.0

Batch a

NaHCO3

2 M treat

1 M test

64

24

25.3 ± 0.5

7.8 ± 1.1

Batch a

WATER

2 M treat

2.5 M test

64

79

25.4 ± 0.5

10 ± 1.9

Batch a

NaHCO3

2 M treat

2.5 M test

64

74

25.4 ± 0.6

11 ± 2.3

Batch b

WATER

4 M treat

1 M test

125

34

23.4 ± 0.6

13 ± 1.3

Batch b

NaHCO3

4 M treat

1 M test

125

33

23.6 ± 0.5

11 ± 1.8

Batch c

WATER

4 M treat

1 M test

118

28

23.2 ± 0.4

11 ± 1.5

Batch c

NaHCO3

4 M treat

1 M test

118

27

23.3 ± 0.3

12 ± 1.5

  1. aAge Description: Specimens classified as “X M treat” and “Y M test” were treated X months after casting and the compressive strength test was performed Y months after treatment conclusion