Self-Healing Characteristics of Damaged Rock Salt under Different Healing Conditions
Abstract
:1. Introduction
2. Experimental Section
2.1. Specimen Preparation
2.2. Test Scheme Design
Test number | Number of samples | Testing conditions (preparation) | Setting initial damage | Test conditions (recovery) |
---|---|---|---|---|
1 | 2 | room temperature | uniaxial loading stress 30 MPa | room temperature |
2 | 2 | room temperature | 50 °C constant temperature and humidity (80% RH ± 2%) | |
3 | 2 | room temperature | 70 °C constant temperature and humidity (80% RH ± 2%) | |
4 | 2 | room temperature | 50 °C constant temperature oven | |
5 | 2 | room temperature | 110 °C constant temperature oven | |
6 | 2 | room temperature | triaxial compression tests | |
7 | 2 | 50 °C oven dry, 48 h | triaxial compression tests | |
8 | 2 | 50 °C saturation brine, 48 h | triaxial compression tests |
3. Results and Discussion
3.1. Analysis of the Self-Healing Ability of Damaged Rock Salt
Number | Recovery conditions | Damage value | Recovery percentage (%) | ||
Initial | 200 h recovery | Final recovery | |||
TH2-1 | Room temperature | 0.38 | 0.28 | 0.26 | 31.58 |
TH2-2 | 0.52 | 0.38 | 0.36 | 30.77 | |
TH5-1 | 50 °C constant temperature and humidity | 0.43 | 0.15 | 0.12 | 72.09 |
TH5-2 | 0.55 | 0.36 | 0.25 | 54.55 | |
TH7-1 | 70 °C constant temperature and humidity | 0.38 | 0.1 | 0.08 | 78.95 |
TH7-2 | 0.55 | 0.29 | 0.16 | 70.91 | |
TO5-1 | 50 °C constant temperature oven | 0.37 | 0.35 | 0.33 | 10.80 |
TO5-2 | 0.43 | 0.35 | 0.35 | 18.60 | |
TO11-1 | 110 °C constant temperature oven | 0.39 | 0.41 | 0.37 | 5.13 |
TO11-2 | 0.40 | 0.40 | 0.39 | 2.50 |
3.2. Effect of Stress-Induced Initial Damage on Damage Self-healing
3.3. Effects of Temperature and Moisture on Damage Self-Healing
3.4. Effect of Oil on Damage Self-Healing of Rock Salt in Triaxial Compression
Specimen number | Test conditions (preparation) | Damage value | Recovery percentage (%) | ||
Initial | 200 h recovery | Final recovery | |||
STO5-1 | 50 °C oven dry, 48 h | 0.49 | 0.72 | 0.50 | −2.04% |
STO5-2 | 0.40 | 0.61 | 0.40 | 0 | |
STH5-1 | 50 °C saturation brine, 48 h | 0.40 | 0.56 | 0.40 | 0 |
STH5-2 | 0.42 | 0.54 | 0.45 | −7.14% | |
STR-1 | Room temperature | 0.46 | 0.59 | 0.46 | 0 |
STR-2 | 0.49 | 0.68 | 0.53 | −8.16% |
4. Conclusions
Acknowledgments
Conflict of Interest
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Chen, J.; Ren, S.; Yang, C.; Jiang, D.; Li, L. Self-Healing Characteristics of Damaged Rock Salt under Different Healing Conditions. Materials 2013, 6, 3438-3450. https://doi.org/10.3390/ma6083438
Chen J, Ren S, Yang C, Jiang D, Li L. Self-Healing Characteristics of Damaged Rock Salt under Different Healing Conditions. Materials. 2013; 6(8):3438-3450. https://doi.org/10.3390/ma6083438
Chicago/Turabian StyleChen, Jie, Song Ren, Chunhe Yang, Deyi Jiang, and Lin Li. 2013. "Self-Healing Characteristics of Damaged Rock Salt under Different Healing Conditions" Materials 6, no. 8: 3438-3450. https://doi.org/10.3390/ma6083438