Synthesis and investigation of properties of nanoscale foam stabilizer for foam concretes with...
-
Upload
abigail-horn -
Category
Documents
-
view
216 -
download
0
Transcript of Synthesis and investigation of properties of nanoscale foam stabilizer for foam concretes with...
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!