Fig. 1. Direction of the crack surface of cracked specimens
Fig. 2. Procedure for measurement of crack widths according to temperature change
Fig. 3. Procedure for measurement of crack widths according to humidity change
Fig. 4. Precipitation of healing products in cracked specimens
Fig. 5. XRD analysis results of healing product in cracked specimen
Fig. 6. The results of water permeability test
Fig. 7. Comparison results of specimens with similar initial water flow rate
Table 1. Mix proportion of self-healing repair mortar
Table 2. Cracking time and exposure conditions of the crack surface for water permeability test specimens
Table 3. Flow and compressive strength of self-healing repair mortar
Table 4. Measurement results of crack widths at each temperature of cracked specimen
Table 5. Measurement results of crack widths according to exposure conditions of cracked specmen
Table 6. Change in reduction rate of water flow with healing duration after cracking 28 days
참고문헌
- Ahn, T.H., Kishi, T. (2010). Crack self-healing behavior of cementitious composites incorporating various mineral admixtures, Journal of Advanced Concrete Technology, 8(2), 171-186. https://doi.org/10.3151/jact.8.171
- Choi, S.W., Bae, W.H., Lee, K.M., Shin, K.J. (2017). Correlation between crack width and water flow of cracked mortar specimens measured by constant water head permeability test, Journal of the Korea Concrete Institute, 29(3), 267-273. https://doi.org/10.4334/JKCI.2017.29.3.267
- Koide, T., Kishi, T., Ahn, T.H., Morita, T. (2011). A study on semi-capsulation technique for concrete incorporating crack self-healing material, Journal of the Janpan Concrete Institute, 33(1), 1451-1456.
- Lee, W.J., Hwang, J.S., Ahn, S.W., Lee, K.M. (2016). Water permeability performance evaluation of mortar containing crack self-healing mineral admixtures, Journal of the Korean Recycled Construction Resoures Institute, 4(4), 463-469. https://doi.org/10.14190/JRCR.2016.4.4.463
- Roig-Flores, M., Moscato, S., Serna, P., Ferrara, L. (2015). Self-healing capability of concrete with crystalline admixtures in different environments, Construction and Building Materials, 86, 1-11. https://doi.org/10.1016/j.conbuildmat.2015.03.091
- Roig-Flores, M., Pirritano, F., Serna, P., Ferrara, L. (2016). Effect of crystalline admixtures on the self-healing capability of early-age concrete studied by means of permeability and crack closing tests, Construction and Building Materials, 114, 447-457 https://doi.org/10.1016/j.conbuildmat.2016.03.196
- Sisomphon, K., Copuroglu, O., Koenders, E.A.B. (2012). Self-healing of surface cracks in mortars with expansive additive and crystalline additive, Cement & Concrete Composite, 34, 566-574. https://doi.org/10.1016/j.cemconcomp.2012.01.005
- Sisomphon, K., Copuroglu, O., Koenders, E.A.B. (2013). Effect of exposure conditions on self healing behaviot of strain hardening cementitious composites incorporating various cementitious materials, Construction and Building Materials, 42, 217-224. https://doi.org/10.1016/j.conbuildmat.2013.01.012