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http://dx.doi.org/10.14190/JRCR.2019.7.1.29

Self-Healing Properties in Cracking of Blast Furnace Slag Cement Paste  

Lee, Seung-Heun (Dep. of Materials Engineering, Kunsan National University)
Kang, Kook-Hee (Dep. of Materials Engineering, Kunsan National University)
Lim, Young-Jin (Dep. of Materials Engineering, Kunsan National University)
Lee, Se-Jin (Dep. of Materials Engineering, Kunsan National University)
Park, Byeong-Seon (Korea Conformity Laboratories)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.7, no.1, 2019 , pp. 29-36 More about this Journal
Abstract
This study investigated the self-healing properties of blast furnace slag cement paste sample with $Na_2SO_4$ as a blast furnace slag activator after conducting the permeability test. Self-healing properties were examined by crack filling ratio and quantification of self-healing products. The degree of self-healing was evaluated by the crack filling ratio, and the crack filling ratio was analyzed by panoramic analysis using BSE-DIP for objectivity. The average crack filling ratio showed a tendency of decreasing from the upper part of the specimen to the lower part as the average of the top part was 18%, the middle part was 7% and the bottom part was 5% on average. The maximum crack filling ratio was 44% and the minimum crack filling ratio was 3%. The residual self-healing product after the permeability test contained a large amount of Ca element and Al element derived from the blast furnace slag, and the Si element was mainly present near the crack surface. The most abundant minerals in self-healing products were about 68% C-A-H. $CaCO_3$ was about 13% and C-A-S-H was about 8%. Three minerals accounted for 90% of self-healing products. C-A-H was mainly present at a part slightly distant from the crack surface and showed an angular or acicular shape. The C-A-S-H was generated on the surface naturally connected to the existing specimen, and the $CaCO_3$ was generally observed on the surface of the specimen or the inside of the crack.
Keywords
Blast furnace slag cement; Self-healing; $Na_2SO_4$; Crack filling ratio;
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1 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.   DOI
2 Chen, J., Liu, X., Ye, G. (2016). Quantification the filling of microcracks due to autogenous self-healing in cement paste, International RILEM Conference on Materials, International RILEM Conference on Materials, 22-24.
3 Huang, H., Ye, G., Damidot, D. (2013). Characterization and quantification of self-healing behaviors of microcracks due to further hydration in cement paste, Cement and Concrete Research, 52, 71-81.   DOI
4 Hong, G.T., Choi, S.C. (2017). Rapid self-sealing of cracks in cementitious materials incorporating superabsorbent polymers, Construction and Building Materials, 143, 366-375.   DOI
5 Huang, H., Ye, G., Damiot, D. (2014). Effect of blast furnace slag on self-healing of microcracks in cementitious materials, Cement and Concrete Research. 60, 68-82.   DOI
6 Joseph, C., Gardner D., Jefferson, T., Isaacs, B., Lark, B. (2010). Self-healing cementitious materials: a review of recent work, Proceedings of the ICE - Construction Materials, 164(1), 29-41.   DOI
7 Jiang, Z., Li, W., Yuan, Z. (2015). Influence of mineral additives and environmental conditions on the self-healing capabilities of cementitious materials, Cement and Concrete Composites, 57, 116-127.   DOI
8 Kapeluszna, E., Kotowica, L., Rozycka, A., Golek, L. (2017). Incorporation of Al in C-A-S-H gels with various Ca/Si and Al/Si ratio: Microstructural and structural characteristics with DTA/TG, XRD, FTIR and TEM analysis, Construction Building Materials, 155, 643-653.   DOI
9 Mehta, P.K., Monteiro, P.J.M. (2006). Concrete-Third Edition, McGraw-Hill, 121-198.
10 Nijland, T.J., Larbi, J.A., van Hees, R.P.J., Lubelli, B., de Rooij, M.R. (2007). "Self-healing phenomena in concretes and masonry mortars: a microscopic study," Proceedings of the First International Conference on self Healing Materials, Noordwijk aan zee, the Netherlands April, 1-9.
11 Neville, A.M. (2012). Properties of Concrete: Fourth and Final Edition, McGraw-Hill, 91-102.
12 Wang, S.D., Scrivener, K.L. (1995). Hydration products of alkali activated slag cement, Cement and Conrete Research, 25, 561-571.   DOI