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http://dx.doi.org/10.11112/jksmi.2020.24.6.50

Material Properties Evaluation of Cement Mortar Mixed with Organic/Inorganic Combined Water-repellent  

Kim, Wan-Su (한양대학교 대학원 스마트시티공학과)
Yoon, Chang-Bok (한양대학교 대학원 건축시스템공학과)
Cho, In-Sung (한양대학교 ERICA)
Lee, Han-Seung (한양대학교 ERICA 건축학부)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.24, no.6, 2020 , pp. 50-58 More about this Journal
Abstract
When the concrete surface layer is damaged, The method of impregnating the concrete surface with a water repellent cannot secure the expected durability. Recently, various waterproofing and water-repellent materials were mixed into concrete or mortar to secure water repellency even inside cracks, but compressive strength was greatly reduced. In order to overcome the decrease in compressive strength, there has not yet been a study using the merits of organic and inorganic materials at the same time, so in this study, the physical properties and water repellency performance were evaluated by mixing an organic/inorganic composite water repellent appropriately mixed with an organic and inorganic material into the mortar. When mixed with organic/inorganic water repellent, the flow and air content were reduced by about 10% and 50% compared to the Liquid specimen. In the case of the P6L1 specimen, it was confirmed that the compressive strength decreased by about 3.5% compared to the non-mixed mortar at 39.5 MPa, the same as the existing water repellent, Powder. Water-repellent performance The organic-inorganic composite water repellent mixture specimen confirmed higher water repellency than the existing water repellent mixture powder, and the chloride penetration resistance evaluation result showed that the organic-inorganic composite water repellent mixture specimen reduced the passing charge by about 45% compared to the non-mixed mortar. In summary, it is judged that the P5L1 organic/inorganic composite water repellent mixed with a powder water repellent and a liquid water repellent in a ratio of 5:1 is the most reasonable to prevent the decrease in compressive strength and secure water repellency.
Keywords
Absorption; Air content; Compressive strength; Organic/Inorganic combined water-repellent; Resistance of $Cl^-$ penetration;
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1 Lanzon, M., Martinez, E., Mestre, M., and Madrid, J. A. (2017). Use of zinc stearate to produce highly-hydrophobic adobe materials with extended durability to water and acid-rain. Construction and Building Materials, 139, 114-122.   DOI
2 Felekoglu, B. (2012). A method for improving the early strength of pumice concrete blocks by using alkyl alkoxy silane (AAS). Construction and Building Materials, 28(1), 305-310.   DOI
3 Maryoto, A., Gan, B. S., Hermanto, N. I. S., and Setijadi, R. (2018). The Compressive Strength and Resistivity toward Corrosion Attacks by Chloride Ion of Concrete Containing Type I Cement and Calcium Stearate. International Journal of Corrosion, 2018.
4 Atla, S. B., Huang, Y. H., Yang, J., Chen, H. J., Kuo, Y. H., Hsu, C. M., Lee, W. C., Chen, C. C., Hsu, D. W. and Chen, C. Y. (2017). Hydrophobic calcium carbonate for cement surface, Crystals, 7(12), 371.   DOI
5 Maranhao, F. L., John, V. M., Loh, K., Pileggi, R. G., De Clercq, H., and Charola, A. E. (2008). The influence of silicone based water repellents as admixtures on the rheological properties of cement slurry. In Hydrophobe V, 5th International Conference on Water Repellent Treatment of Building Materials, Aedificatio, Brussels , 255, 258.
6 Quraishi, M. A., Kumar, V., Abhilash, P. P., and Singh, B. N. (2011). Calcium stearate: A green corrosion inhibitor for steel in concrete environment. J. Mater. Environ. Sci, 2(4), 365-372.
7 Naseroleslami, R., and Chari, M. N. (2019). The effects of calcium stearate on mechanical and durability aspects of self-consolidating concretes incorporating silica fume/natural zeolite. Construction and Building Materials, 225, 384-400.   DOI
8 浅本晋吾, 古田悠佳, 欒堯, & 米田大樹. (2018). 撥水材を混入したセメント系材料の内部撥水性と材料特性の検討. コンクリート工学論文集, 29, 11-19.
9 Zhao, T., Wittmann, F. H., Jiang, R., and Li, W. (2011). Application of silane-based compounds for the production of integral water repellent concrete. In HVI, 6th International conference on WR treatment of building materials, 137-144.
10 Li, W., Wittmann, F. H., Jiang, R., Zhao, T., and Wolfseher, R. (2011). Metal soaps for the production of integral water repellent concrete. In Proceedings of Hydrophobe VI, 6th international conference on water repellent treatment of building materials. Aedificatio Publisher, Freiburg, 145-154.
11 Shim, H. B., and Lee, M. S. (2004). An Experimental Study on Water Resistance of Penetrating Water Repellency of Emulsified Silicon Type Exposed In The Outdoor Environment. Journal of the Korea Concrete Institute, 16(4), 477-484 (in Korean).   DOI
12 Zhu, Y. G., Kou, S. C., Poon, C. S., Dai, J. G., and Li, Q. Y. (2013). Influence of silane-based water repellent on the durability properties of recycled aggregate concrete. Cement and Concrete Composites, 35(1), 32-38.   DOI
13 Song, H. W., Pack, S. W., and Ann, K. Y. (2007). Time dependent chloride transport evaluation of concrete structures exposed to marine environment. Journal of the Korea Concrete Institute, 19(5), 585-593 (in Korean).   DOI
14 Shim, S. M. (2002), The study on effect silane solution as protection agent of absorption for the durability in concrete surface layer, thesis, Seoul National University of Science and Technology, 66p (in Korean).
15 Jang, S. H., Woo, J. T., Nam, Y. H., and Kim, S. S. (2003). Evaluation on Performance of Penetrative Water-repellent for Durability Progress of Concrete Structure. Journal of the Korea Institute for Structural Maintenance and Inspection, 7(1), 289-296 (in Korean).
16 Zhu, H., Li, Q., Ma, R., Yang, L., Hu, Y., and Zhang, J. (2020). Water-repellent additive that increases concrete cracking resistance in dry curing environments. Construction and Building Materials, 249, 118704.   DOI
17 Chari, M. N., Naseroleslami, R., and Shekarchi, M. (2019). The impact of calcium stearate on characteristics of concrete. Asian Journal of Civil Engineering, 20(7), 1007-1020.   DOI
18 Kim, D. H., Lee, H. N., Hong, S. H., Chun, S. M. and Jeong. Y. (2018), Effect on properties of mortar according to type and amount of water repellent, Proceedings of Journal of Korea Concrete Institute, 30, 475-476 (in Korean).
19 Maryoto, A. (2017). Resistance of concrete with calcium stearate due to chloride attack tested by accelerated corrosion. Procedia Engineering, 171, 511-516.   DOI
20 Kong, X. M., Liu, H., Lu, Z. B., and Wang, D. M. (2015). The influence of silanes on hydration and strength development of cementitious systems. Cement and Concrete Research, 67, 168-178.   DOI