Synthesis and investigation of properties of nanoscale foam stabilizer for foam concretes

with synthesized foamers

Moscow State University of Civil Engineering

Scientific and Educational Center “Nanotechnology”

Spokesperson: Anna Grishina

Model of the “iron III hydroxide sol and sodium hydrosilicates” system

Average size of the particles in“iron III hydroxide sol and sodium hydrosilicates” system

Reference system: =0 =0.5

=1 =1.5

0

60

120

0.17 0.2 0.25 0.33 0.4 0.45 0.5

6

7

8

9

10

Dia

met

er, n

m

Tim

e, d

ays

Concentration, %

0

14

Dia

me

ter,

nm

Tim

e, d

ays

Concentration, %

4

9

14

19

24

29

0.17 0.2 0.25 0.33 0.4 0.45 0.5

0

80

1610.17 0.2 0.25 0.33 0.4 0.45 0.5

Dia

met

er, n

m

Tim

e, d

ays

Concentration, %

4

6

8

10

12

14

16

18

0

60

120

0.17 0.2 0.25 0.33

Dia

me

ter,

nm

Tim

e, d

ays

Concentration, %

4

9

14

19

24

29

34

= 0 = 0.5

= 1 = 1.5

- С = 0.17%; □ - С = 0.33%; - С = 0.50%

0.9

1

1.1

1.2

1.3

1.4

0 20 40 60 80 100 120 140 160 180

Time, days

Vis

cosi

ty, m

Pa*

s

0.9

1

1.1

1.2

1.3

1.4

1.5

0 20 40 60 80 100 120 140 160 180

Time, days

Vis

cosi

ty, m

Pa

*s0.9

1

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

0 20 40 60 80 100 120 140 160 180

Time, days

Vis

cosi

ty, m

Pa*

s

0.9

1

1.1

1.2

1.3

1.4

1.5

1.6

0 20 40 60 80 100 120 140 160 180

Time, days

Vis

co

sit

y,

mP

a*s

4.6

Viscosity of the “iron III hydroxide sol and sodium hydrosilicates” system

Viscosity of system formed by iron hydroxide sol (0.66%), sodium hydrosilicates and “PB Lux” foamer

♦ – = 1.2; ◊ – = 1.4; ■ – = 1.5; ▲ – = 1.7%; ○ – = 1.8; ∆ – = 1.9; □ – = 2.0

0

50

100

150

200

250

300

350

400

450

0 50 100 150 200 250 300

Time, min

Vis

cosi

ty, m

Pa

s

)exp(0

kt

Parameters of foams produced with«PB Lux» foamer

Parameter

Parameters of foams

Foamingpower, %

Foamstability, %

Reference 435 77.0

1.2 435 87.9

1.3 435 98.9

1.4 435 98.7

1.5 435 92.3

1.6 435 78.5

1.7 435 78.9

1.8 435 78.7

1.9 435 78.9

2.0 435 77.0

рН value of the nanoscale admixture

α Parameter рН

0 1.40

1.1 4.84

1.2 6.81

1.3 8.07

1.4 8.83

1.5 9.18

1.6 9.55

1.7 9.74

1.8 9.83

1.9 10.02

2.0 10.09

Note: рН of solutions are specified for 28 оС

Compressive strength of the nanoscale-modified foam concretes

Strength of the developed nanoscale-modified foam concrete as a dependence from foamer

content and parameter

Relative strength of the developed nanoscale-modified foam concrete as a dependence from

foamer content and parameter

0.75

0.25

1.31.4

1.60

1

2

3

4

5

6

Foamer ,%

R, MPa

1.3

1.35

1.4

1.45

1.6

0.75

0.5

0.25

0

10

20

30

40

50

60

R, %

Foamer, %

Practical application of the “iron hydroxide sol and sodium hydrosilicates” system

Thank you for your attention!