Browse > Article
http://dx.doi.org/10.4334/JKCI.2012.24.5.577

Effects of Basicity on the Carbonation Characteristics of Alkali-Activated Slag Mortar  

Song, Keum-Il (School of Architecture, Chonnam National University)
Lee, Bang-Yeon (School of Architecture, Chonnam National University)
Hong, Geon-Ho (School of Architecture, Hoseo University)
Gong, Min-Ho (Research & Development Team, Hyundai-amco)
Song, Jin-Kyu (School of Architecture, Chonnam National University)
Publication Information
Journal of the Korea Concrete Institute / v.24, no.5, 2012 , pp. 577-584 More about this Journal
Abstract
Carbonation resistance is one of the most influencing factors on durability of concrete. Alkali activated slag (AAS) is known to have weaker resistance for carbonation than OPC due to the low calcium contents. In this paper, the carbonation characteristic of AAS mortar which is related to the basicity (CaO/$SiO_2$) was investigated. In order to give the various basicity conditions, SM (source material) was blended with quicklime (CaO) and silicon dioxide ($SiO_2$) by adopting mechano-chemical treatment method. Experiments including flow test, compressive strength test, carbonation depth test, together with XRD, FTIR and TGA were employed to evaluate the effects of basicity of SM on the carbonation characteristics. The test results showed that the carbonation resistance effectively increased with the increase of the basicity of SM.
Keywords
alkali-activated slag; blast-furnace slag; basicity; carbonation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Chang, C. and Chen, J., "The Experimental Investigation of Concrete Carbonation Depth," Cement and Concrete Research, Vol. 36, No. 9, 2006, pp. 1760-1767.   DOI   ScienceOn
2 Puertas, F., Palacios, M., and Vazquez, T., "Carbonation Process of Alkali-Activated Slag Mortars," Journal of Materials Science, Vol. 41, No. 10, 2006, pp. 3071-3082.   DOI
3 Bernal, S. A., Gutierrez, R. M., Provis, J. L., and Rose, V., "Effect of Silicate Modulus and Metakaolin Incorporation on the Carbonation of Alkali Silicate-Activated Slags," Cement and Concrete Research, Vol. 40, No. 6, 2010, pp. 898-907.   DOI   ScienceOn
4 Peng, G.-F. and Peng, Z.-S., "Change in Microstructure of Hardened Cement Paste Subjected to Elevated Temperatures," Construction and Building Materials, Vol. 22, No. 4, 2008, pp. 593-599.   DOI   ScienceOn
5 Malhotra, V. M., "Introduction: Sustainable Developmentand Concrete Technology," Concrete International, Vol. 24, No. 7, 2001, 22 pp.
6 Pacheco-Torgal, F., Castro-Gomes, J., and Jalai, S., "Alkali- Activated Binders: a Review, Part 2. about Materials and Binder Manufacture," Construction and Building Materials, Vol. 22, No. 7, 2008, pp. 1315-1322.   DOI   ScienceOn
7 Palomo, A., Grutzeck, M. W., and Blanco, M. T., "Alkali Activated Fly Ashes: A Cement for the Future," Cement and Concrete Research, Vol. 29, No. 8, 1999, pp. 1323- 1329.   DOI   ScienceOn
8 Roy, D, M., "Alkali-Activated Cements : Opportunities and Challenges," Cement and Concrete Research, Vol. 29, No. 2, 1999, pp. 249-254.   DOI   ScienceOn
9 Korea Cement Association, 2010 Cement of Statistical Annual Report in Korea, Korea, 2011. 13 pp.
10 Krivenko, P. V., "Alkaline Cements," First International Conference on Alkaline Cements and Concrete, Kiev, Ukraine, 1994, pp. 11-130.
11 Byfors, K., Klingstedt, G., Lehtonen, V., Pyy, H. and Romben, L., "Durability of Concrete Made with Alkali-Activated Slag," Third International Conference on the Use of Natural Pozzolans, Flay Ash, Blast Furnace Slag and Silica Fume in Concrete, ACI SP-114, 1989, pp. 1429-1466.
12 Song, K. I., Song, J. K., Yang, K. H., and Lee, B. Y., "Carbonation Characteristics of Alkali Activated Blast-furnace Slag Mortar," Journal of the Korea Concrete Institute, Vol. 24, No. 3, 2012, pp. 315-322.   DOI   ScienceOn
13 Shi, C., Krivenko, P. V., and Roy, D., Alkali-Activated Cements and Concretes, Taylor and Francis, UK, 2006, pp. 6-29.
14 Saito, F., Mi, G., and Hanada, M., "Mechanochemical Synthesis of Hydrated Calcium Silicates by Room Temperature Grinding," Solid State Ionics, Vol. 101-103, 1997, pp. 37-43.   DOI
15 Damtoft, J. S., Lukasik, J., Herfort, D., Sorrentino, D., and Gartner, E. M., "Sustainable Development and Climate Change Initiatives," Cement and Concrete Research, Vol. 38, No. 2, 2008, pp. 115-127.   DOI   ScienceOn