1 Introduction
2 Experimental Investigation
2.1 Materials and Mixture Proportions
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Type II-V cement (TII-V)
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Ground granulated blast furnace slag of grade 120 (G120S)
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Ground granulated blast furnace slag of grade 100 (G100S)
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Class C fly Ash (C)
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Class F fly Ash (F)
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Silica fume (SF)
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Metakaolin (M)
2.2 Measurement of Surface Electrical Resistivity
2.3 Measurement of Bulk Electrical Resistivity
3 Results and Discussions
3.1 Bulk and Surface Resistivity Data Analysis and Correlation
Chloride ion permeability classification | Surface resistivity test 28 day test Kohm-cm |
---|---|
High | <12 |
Moderate | 12–21 |
Low | 21–37 |
Very low | 37–254 |
Negligible | >254 |
No. | Mixture ID | Classification | Surface resistivity (Kohm-cm) | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
7 days | 14 days | 28 days | 56 days | 91 days | 161 days | |||||||||
Mean | Standard deviation | Mean | Standard deviation | Mean | Standard deviation | Mean | Standard deviation | Mean | Standard deviation | Mean | Standard deviation | |||
1 | 100TII-V | Moderate | 14.5 | 0.7 | 15.4 | 1.2 | 21.0 | 1.1 | 28.3 | 1.5 | 36.5 | 2.7 | 42.2 | 2.0 |
2 | 60TII-V/25C/15M | Moderate | 6.5 | 0.3 | 10.2 | 0.4 | 12.8 | 0.4 | 19.8 | 0.7 | 22.4 | 1.0 | 33.2 | 1.3 |
3 | 60TII-V/30C/10M | Moderate | 6.2 | 0.3 | 9.9 | 0.5 | 13.6 | 0.8 | 16.4 | 0.9 | 19.3 | 1.0 | 27.9 | 1.9 |
4 | 80TII-V/20C | Moderate | 11.2 | 0.8 | 12.5 | 1.1 | 18.2 | 1.2 | 27.3 | 1.6 | 37.5 | 2.3 | 45.4 | 2.3 |
5 | 45TII-V/40G120S/15C | Moderate | 13.4 | 0.6 | 15.3 | 0.7 | 18.3 | 1.1 | 24.5 | 1.3 | 25.3 | 1.2 | 26.5 | 1.1 |
6 | 65TII-V/35G120S | Moderate | 12.1 | 0.6 | 14.8 | 0.6 | 18.6 | 1.1 | 20.9 | 1.1 | 26.6 | 1.4 | 28.6 | 1.9 |
7 | 65TII-V/5SF/30C | Moderate | 10.8 | 0.7 | 13.3 | 0.9 | 19.8 | 0.9 | 35.8 | 1.9 | 43.3 | 1.8 | 45.7 | 2.1 |
8 | 60TII-V/20C/20F | Moderate | 8.7 | 0.5 | 12.8 | 0.5 | 20.4 | 0.8 | 32.1 | 1.4 | 42.3 | 1.9 | 54.1 | 2.5 |
9 | 60TII-V/30F/10M | Low | 8.8 | 0.4 | 16.8 | 0.5 | 21.2 | 0.7 | 24.1 | 4.2 | 33.8 | 1.2 | 66.2 | 3.4 |
10 | 65TII-V/28C/7M | Low | 9.8 | 0.4 | 17.0 | 0.6 | 21.5 | 0.6 | 23.9 | 0.9 | 28.2 | 0.9 | 37.9 | 1.4 |
11 | 50TII-V/35G120S/15C | Low | 13.5 | 0.9 | 15.7 | 1.0 | 21.6 | 1.5 | 27.3 | 2.1 | 36.6 | 2.3 | 37.0 | 2.1 |
12 | 55TII-V/5SF/40G120S | Low | 13.5 | 0.4 | 15.9 | 0.5 | 23.3 | 0.7 | 35.6 | 1.4 | 43.9 | 1.2 | 53.2 | 1.5 |
13 | 60TII-V/25F/15M | Low | 12.1 | 0.4 | 17.3 | 0.7 | 23.6 | 0.9 | 43.0 | 1.5 | 67.5 | 2.9 | 172.2 | 6.6 |
14 | 50TII-V/35G120S/15F | Low | 14.3 | 0.6 | 17.4 | 0.7 | 25.7 | 1.0 | 37.0 | 1.4 | 55.0 | 1.8 | 51.6 | 2.1 |
15 | 60TII-V/30C/10F | Low | 11.8 | 0.4 | 17.0 | 0.7 | 24.4 | 1.0 | 32.1 | 1.4 | 44.0 | 2.8 | 57.6 | 2.9 |
16 | 60TII-V/30F/10C | Low | 12.3 | 0.6 | 19.3 | 0.8 | 26.1 | 1.1 | 36.1 | 1.5 | 48.2 | 1.9 | 68.4 | 4.1 |
17 | 65TII-V/5SF/30F | Low | 12.4 | 0.6 | 16.7 | 0.7 | 26.6 | 1.2 | 48.9 | 1.8 | 63.0 | 0.7 | 68.6 | 2.9 |
18 | 80TII-V/20F | Low | 10.8 | 0.5 | 15.9 | 0.8 | 27.3 | 1.2 | 45.5 | 2.3 | 58.8 | 2.7 | 73.8 | 4.2 |
19 | 60TII-V/35G120S/5SF | Low | 13.7 | 0.5 | 20.1 | 0.8 | 31.0 | 1.2 | 38.7 | 1.7 | 55.8 | 2.0 | 72.4 | 1.8 |
20 | 75TII-V/20C/5SF | Low | 13.3 | 0.6 | 19.1 | 0.9 | 31.2 | 1.2 | 51.2 | 1.7 | 73.9 | 2.7 | 71.6 | 2.9 |
21 | 95TII-V/5SF | Low | 16.1 | 0.7 | 20.8 | 0.9 | 31.4 | 1.7 | 44.1 | 2.3 | 57.4 | 2.3 | 58.4 | 3.1 |
22 | 93TII-V/7SF | Low | 16.0 | 0.7 | 22.0 | 1.2 | 35.8 | 1.7 | 54.2 | 2.4 | 59.1 | 4.2 | 71.9 | 3.7 |
23 | 65TII-V/28F/7M | Low | 16.5 | 1.6 | 24.6 | 1.0 | 32.9 | 1.3 | 41.3 | 2.0 | 58.5 | 2.0 | 97.8 | 4.7 |
24 | 75TII-V/20F/5SF | Very low | 15.7 | 0.9 | 23.9 | 1.3 | 38.4 | 2.1 | 62.9 | 2.5 | 93.6 | 3.4 | 97.7 | 6.0 |
25 | 65TII-V/35G100S | Very low | 16.1 | 0.5 | 25.3 | 0.7 | 39.4 | 1.5 | 52.5 | 2.8 | 56.6 | 1.8 | 50.2 | 1.9 |
26 | 50TII-V/35G100S/15C | Very low | 19.9 | 2.3 | 29.4 | 2.8 | 41.3 | 3.9 | 47.5 | 3.3 | 57.7 | 4.4 | 59.1 | 5.5 |
27 | 58TII-V/35G120S/7M | Very low | 15.6 | 0.4 | 26.8 | 0.8 | 43.8 | 1.4 | 58.0 | 1.5 | 69.4 | 2.2 | 80.8 | 3.3 |
28 | 60TII-V/35G100S/5SF | Very low | 16.7 | 2.5 | 26.4 | 1.2 | 44.5 | 2.5 | 60.7 | 3.0 | 71.8 | 3.4 | 78.2 | 2.5 |
29 | 45TII-V/35G100S/20F | Very low | 21.3 | 1.1 | 33.3 | 1.5 | 47.5 | 1.9 | 52.0 | 2.6 | 71.2 | 3.4 | 73.5 | 3.0 |
30 | 50TII-V/35G100S/15F | Very low | 21.7 | 1.6 | 34.1 | 4.4 | 47.6 | 4.6 | 51.4 | 4.6 | 64.4 | 4.8 | 72.0 | 5.0 |
31 | 45TII-V/40G120S/15F | Very low | 20.9 | 1.8 | 33.2 | 2.7 | 48.7 | 3.8 | 69.3 | 2.6 | 71.9 | 5.7 | 69.6 | 5.2 |
32 | 50TII-V/35G120S/15M | Very low | 17.8 | 2.4 | 34.2 | 1.0 | 61.8 | 1.9 | 102.8 | 3.0 | 146.8 | 5.0 | 205.1 | 8.8 |
33 | 50TII-V/40G120S/10M | Very low | 27.4 | 2.5 | 46.4 | 3.3 | 73.4 | 3.6 | 107.2 | 7.0 | 140.3 | 6.6 | 109.3 | 9.0 |
No. | Mixture ID | Classification | Bulk resistivity (Kohm-cm) | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
7 days | 14 days | 28 days | 56 days | 91 days | 161 days | |||||||||
Mean | Standard deviation | Mean | Standard deviation | Mean | Standard deviation | Mean | Standard deviation | Mean | Standard deviation | Mean | Standard deviation | |||
1 | 100TII-V | Moderate | 6.5 | 0.3 | 6.9 | 0.3 | 8.3 | 0.4 | 10.6 | 0.5 | 13.9 | 0.6 | 15.0 | 0.6 |
2 | 60TII-V/25C/15M | Moderate | 3.5 | 0.1 | 4.5 | 0.2 | 5.7 | 0.1 | 8.6 | 0.2 | 9.5 | 0.2 | 16.5 | 0.2 |
3 | 60TII-V/30C/10M | Moderate | 2.9 | 0.0 | 4.0 | 0.1 | 5.7 | 0.0 | 7.3 | 0.1 | 8.0 | 0.1 | 12.9 | 0.4 |
4 | 80TII-V/20C | Moderate | 5.3 | 0.3 | 5.6 | 0.3 | 8.4 | 0.5 | 10.7 | 0.3 | 14.3 | 0.9 | 18.0 | 0.7 |
5 | 45TII-V/40G120S/15C | Moderate | 5.8 | 0.3 | 5.9 | 0.3 | 6.8 | 0.4 | 9.9 | 0.5 | 9.4 | 0.6 | 11.7 | 0.6 |
6 | 65TII-V/35G120S | Moderate | 5.9 | 0.1 | 6.5 | 0.1 | 6.5 | 0.1 | 7.4 | 0.2 | 8.5 | 0.1 | 11.2 | 0.2 |
7 | 65TII-V/5SF/30C | Moderate | 4.5 | 0.2 | 6.0 | 0.2 | 9.0 | 0.2 | 16.0 | 0.7 | 18.5 | 1.1 | 18.9 | 0.3 |
8 | 60TII-V/20C/20F | Moderate | 3.9 | 0.2 | 5.7 | 0.3 | 8.1 | 0.4 | 11.6 | 0.5 | 16.1 | 0.6 | 19.5 | 0.6 |
9 | 60TII-V/30F/10M | Low | 4.1 | 0.0 | 6.8 | 0.0 | 8.5 | 0.1 | 10.5 | 0.1 | 13.1 | 0.0 | 27.5 | 0.2 |
10 | 65TII-V/28C/7M | Low | 5.4 | 0.1 | 8.5 | 0.2 | 7.9 | 0.1 | 11.1 | 0.1 | 10.7 | 0.1 | 17.1 | 0.5 |
11 | 50TII-V/35G120S/15C | Low | 5.3 | 0.2 | 4.8 | 0.2 | 6.8 | 0.2 | 10.1 | 0.1 | 14.6 | 0.4 | 12.2 | 0.1 |
12 | 55TII-V/5SF/40G120S | Low | 5.3 | 0.2 | 5.8 | 0.2 | 8.3 | 0.2 | 14.8 | 0.3 | 15.8 | 0.2 | 21.8 | 0.3 |
13 | 60TII-V/25F/15M | Low | 6.2 | 0.5 | 7.2 | 0.5 | 10.2 | 0.5 | 17.6 | 0.8 | 26.1 | 0.9 | 67.5 | 3.0 |
14 | 50TII-V/35G120S/15F | Low | 5.6 | 0.2 | 5.3 | 0.1 | 7.3 | 0.2 | 12.9 | 0.2 | 18.9 | 0.7 | 17.7 | 0.6 |
15 | 60TII-V/30C/10F | Low | 5.4 | 0.1 | 8.1 | 0.3 | 10.0 | 0.3 | 15.2 | 0.4 | 16.5 | 0.4 | 22.5 | 0.7 |
16 | 60TII-V/30F/10C | Low | 5.8 | 0.2 | 9.5 | 0.4 | 10.7 | 0.3 | 16.6 | 0.6 | 18.3 | 0.6 | 24.2 | 0.8 |
17 | 65TII-V/5SF/30F | Low | 5.1 | 0.4 | 7.6 | 0.3 | 12.0 | 0.5 | 19.9 | 0.5 | 26.8 | 2.3 | 28.6 | 0.6 |
18 | 80TII-V/20F | Low | 4.8 | 0.2 | 6.7 | 0.2 | 9.5 | 0.3 | 15.3 | 0.6 | 21.5 | 0.5 | 26.8 | 1.3 |
19 | 60TII-V/35G120S/5SF | Low | 6.0 | 0.0 | 7.9 | 0.0 | 9.9 | 0.2 | 11.8 | 0.3 | 15.4 | 0.2 | 21.7 | 0.2 |
20 | 75TII-V/20C/5SF | Low | 5.4 | 0.1 | 8.5 | 0.2 | 12.1 | 0.3 | 21.1 | 0.4 | 27.7 | 0.5 | 26.1 | 0.6 |
21 | 95TII-V/5SF | Low | 5.8 | 0.2 | 6.5 | 0.4 | 7.7 | 0.4 | 14.5 | 0.6 | 20.9 | 0.3 | 21.1 | 0.7 |
22 | 93TII-V/7SF | Low | 5.8 | 0.3 | 6.9 | 0.2 | 9.7 | 0.2 | 18.3 | 0.4 | 26.3 | 0.9 | 27.1 | 0.6 |
23 | 65TII-V/28F/7M | Low | 9.2 | 0.1 | 12.8 | 0.2 | 12.3 | 0.5 | 19.1 | 0.3 | 22.4 | 0.2 | 39.7 | 1.0 |
24 | 75TII-V/20F/5SF | Very low | 7.0 | 0.2 | 9.4 | 2.3 | 15.6 | 0.5 | 27.9 | 0.9 | 37.9 | 1.2 | 36.7 | 1.1 |
25 | 65TII-V/35G100S | Very low | 7.2 | 0.3 | 10.8 | 0.6 | 19.1 | 0.5 | 20.3 | 0.6 | 21.5 | 2.6 | 18.9 | 0.6 |
26 | 50TII-V/35G100S/15C | Very low | 8.9 | 1.0 | 11.9 | 1.0 | 16.4 | 2.4 | 18.8 | 1.5 | 25.5 | 2.1 | 26.7 | 2.5 |
27 | 58TII-V/35G120S/7M | Very low | 7.7 | 0.2 | 13.1 | 0.3 | 15.0 | 0.3 | 25.2 | 1.2 | 25.4 | 0.9 | 33.6 | 0.6 |
28 | 60TII-V/35G100S/5SF | Very low | 6.8 | 0.4 | 11.9 | 0.6 | 22.2 | 1.0 | 25.2 | 1.6 | 28.3 | 0.7 | 28.5 | 1.2 |
29 | 45TII-V/35G100S/20F | Very low | 10.4 | 0.5 | 14.4 | 0.6 | 18.6 | 0.6 | 22.2 | 0.8 | 29.8 | 0.9 | 35.8 | 1.5 |
30 | 50TII-V/35G100S/15F | Very low | 10.1 | 0.7 | 13.6 | 1.0 | 17.9 | 1.5 | 21.4 | 1.6 | 28.7 | 2.2 | 33.1 | 2.4 |
31 | 45TII-V/40G120S/15F | Very low | 9.6 | 0.4 | 13.8 | 0.7 | 24.9 | 1.1 | 26.2 | 0.5 | 29.6 | 1.1 | 26.6 | 1.0 |
32 | 50TII-V/35G120S/15M | Very low | 9.2 | 0.5 | 16.7 | 0.7 | 21.2 | 0.4 | 43.6 | 1.1 | 53.5 | 0.7 | 79.9 | 0.8 |
33 | 50TII-V/40G120S/10M | Very low | 10.7 | 0.4 | 21.1 | 0.5 | 24.2 | 1.0 | 51.4 | 1.0 | 56.7 | 0.7 | 71.1 | 0.6 |
3.2 Comparison of Experimental Resistance and Resistivity Values
No. | Mixture ID | 7 days | 14 days | 28 days | 56 days | 91 days | 161 days |
---|---|---|---|---|---|---|---|
ρ1/ρ2 | ρ1/ρ2 | ρ1/ρ2 | ρ1/ρ2 | ρ1/ρ2 | ρ1/ρ2 | ||
1 | 100TII-V | 2.22 | 2.22 | 2.52 | 2.68 | 2.62 | 2.81 |
2 | 60TII-V/25C/15M | 1.86 | 2.24 | 2.24 | 2.30 | 2.37 | 2.02 |
3 | 60TII-V/30C/10M | 2.12 | 2.47 | 2.39 | 2.23 | 2.40 | 2.17 |
4 | 80TII-V/20C | 2.11 | 2.24 | 2.16 | 2.55 | 2.62 | 2.53 |
5 | 45TII-V/40G120S/15C | 2.29 | 2.59 | 2.68 | 2.48 | 2.69 | 2.25 |
6 | 65TII-V/35G120S | 2.05 | 2.27 | 2.88 | 2.81 | 3.15 | 2.56 |
7 | 65TII-V/5SF/30C | 2.43 | 2.23 | 2.21 | 2.23 | 2.34 | 2.41 |
8 | 60TII-V/20C/20F | 2.23 | 2.24 | 2.51 | 2.76 | 2.63 | 2.78 |
9 | 60TII-V/30F/10M | 2.17 | 2.49 | 2.48 | 2.31 | 2.58 | 2.40 |
10 | 65TII-V/28C/7M | 1.82 | 1.99 | 2.71 | 2.15 | 2.63 | 2.22 |
11 | 50TII-V/35G120S/15C | 2.56 | 3.31 | 3.17 | 2.70 | 2.51 | 3.03 |
12 | 55TII-V/5SF/40G120S | 2.55 | 2.72 | 2.79 | 2.40 | 2.78 | 2.44 |
13 | 60TII-V/25F/15M | 1.96 | 2.39 | 2.32 | 2.44 | 2.58 | 2.55 |
14 | 50TII-V/35G120S/15F | 2.56 | 3.31 | 3.52 | 2.86 | 2.92 | 2.92 |
15 | 60TII-V/30C/10F | 2.18 | 2.09 | 2.44 | 2.11 | 2.68 | 2.57 |
16 | 60TII-V/30F/10C | 2.12 | 2.04 | 2.45 | 2.17 | 2.64 | 2.83 |
17 | 65TII-V/5SF/30F | 2.43 | 2.21 | 2.21 | 2.45 | 2.35 | 2.40 |
18 | 80TII-V/20F | 2.25 | 2.39 | 2.87 | 2.97 | 2.73 | 2.76 |
19 | 60TII-V/35G120S/5SF | 2.29 | 2.55 | 3.15 | 3.29 | 3.62 | 3.34 |
20 | 75TII-V/20C/5SF | 2.44 | 2.25 | 2.59 | 2.42 | 2.67 | 2.74 |
21 | 95TII-V/5SF | 2.80 | 3.21 | 4.07 | 3.05 | 2.75 | 2.76 |
22 | 93TII-V/7SF | 2.74 | 3.20 | 3.68 | 2.97 | 2.25 | 2.66 |
23 | 65TII-V/28F/7M | 1.79 | 1.93 | 2.68 | 2.16 | 2.61 | 2.46 |
24 | 75TII-V/20F/5SF | 2.24 | 2.55 | 2.46 | 2.25 | 2.47 | 2.66 |
25 | 65TII-V/35G100S | 2.24 | 2.34 | 2.06 | 2.58 | 2.64 | 2.65 |
26 | 50TII-V/35G100S/15C | 2.24 | 2.47 | 2.52 | 2.53 | 2.26 | 2.22 |
27 | 58TII-V/35G120S/7M | 2.04 | 2.05 | 2.91 | 2.30 | 2.73 | 2.40 |
28 | 60TII-V/35G100S/5SF | 2.46 | 2.22 | 2.01 | 2.41 | 2.54 | 2.75 |
29 | 45TII-V/35G100S/20F | 2.05 | 2.31 | 2.55 | 2.34 | 2.39 | 2.06 |
30 | 50TII-V/35G100S/15F | 2.15 | 2.50 | 2.65 | 2.40 | 2.24 | 2.17 |
31 | 45TII-V/40G120S/15F | 2.17 | 2.40 | 1.95 | 2.65 | 2.43 | 2.62 |
32 | 50TII-V/35G120S/15M | 1.93 | 2.05 | 2.92 | 2.36 | 2.74 | 2.57 |
33 | 50TII-V/40G120S/10M | 2.57 | 2.20 | 3.03 | 2.09 | 2.48 | 1.54 |
Average | 2.24 | 2.41 | 2.66 | 2.50 | 2.61 | 2.52 |