Table A14. Chemical composition of admixtures tested in Phase 1, Task Ga.
Mix
Dosage
no.
Antifreeze admixture formulation
(% CWT)
w/c Ratio
Remarks
1
Control
0
0.45
Mix too fluid.
2
Ca(NO2)2 /propylene glycol
3/3
0.40
Moderately fast set.
Ca(NO2)2 /propylene glycol
4.2/1.8
0.40
Faster set.
3
4
Ca(NO2)2 /propylene glycol
1.8/4.2
0.40
Moderately fast set.
5
Urea/Ca(NO2)2
1.5/4.5
0.40
Urea/Ca(NO2)2
4.5/1.5
0.40
Easely workable.
6
7
Ca(NO2)2 /Daratard
6/0.26
0.42
Too-rapid set.
8
Ca(NO2)2 /Daratard + microsilica (25%
PC substitution)
6/0.78
0.42
Gritty mix; clay-like: moldable but not bleeding.
9
Ca(NO2)2 /cane sugar
6/0.1
0.40
Soft and workable; not bleeding. Moderate set at 40 minutes.
10
Ca(NO2)2 /latex
6/7.5
0.45
Sticky; too-fast set.
11
N/A
N/A
N/A
12
N/A
N/A
N/A
13
N/A
N/A
N/A
14
N/A
N/A
N/A
15
N/A
N/A
N/A
16
N/A
N/A
N/A
17
N/A
N/A
N/A
18
N/A
N/A
N/A
19
N/A
N/A
N/A
20
N/A
N/A
N/A
Table A15. Compressive strength. Task 1Gb cured at various temperatures.
a. 20C.
b. 5C.
Compressive strength (psi)
Compressive strength (psi)
Testing age (days)
Testing age (days)
Mix no.
7
14
28
Mix no.
7
14
28
1
6027
N/A
N/A
1
953
N/A
N/A
2
N/A
N/A
N/A
2
1936
N/A
N/A
3
N/A
N/A
N/A
3
1000
N/A
N/A
4
N/A
N/A
N/A
4
1456
N/A
N/A
5
N/A
N/A
N/A
5
851
N/A
N/A
6
N/A
N/A
N/A
6
N/A
N/A
N/A
7
N/A
N/A
N/A
7
N/A
N/A
N/A
8
N/A
N/A
N/A
8
N/A
N/A
N/A
9
N/A
N/A
N/A
9
N/A
N/A
N/A
10
N/A
N/A
N/A
10
N/A
N/A
N/A
11
N/A
N/A
N/A
11
N/A
N/A
N/A
12
N/A
N/A
N/A
12
N/A
N/A
N/A
13
N/A
N/A
N/A
13
N/A
N/A
N/A
14
N/A
N/A
N/A
14
N/A
N/A
N/A
15
N/A
N/A
N/A
15
N/A
N/A
N/A
16
N/A
N/A
N/A
16
N/A
N/A
N/A
17
N/A
N/A
N/A
17
N/A
N/A
N/A
18
N/A
N/A
N/A
18
N/A
N/A
N/A
19
N/A
N/A
N/A
19
N/A
N/A
N/A
20
N/A
N/A
N/A
20
N/A
N/A
N/A
33
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