# 양생 방법에 따른 알칼리활성 시멘트 모르타르의 특성

• Accepted : 2014.01.21
• Published : 2014.04.30

#### Abstract

Globally, there are environmental problems due to greenhouse gas emissions. $CO_2$ emissions rate of the cement industry is very high, but the continued demand of cement is needed in the future. In this study, in order to reduce the environmental impact of $CO_2$ emissions from cement production. The experiments were carried out for the development of non-sintered cement (have not undergone firing burning) by granulated ground blast furnace slag. In order to compare the characteristics by curing, an experiment was conducted by changing the curing conditions such as atmospheric steam curing, observe the mechanical properties for the measurement of flexural compressive strength by mortar, observe the chemical properties such as acid resistance, $Cl^-$ penetrate resistance and analyzed the mechanism of hydration by XRD, SEM experiments. From the experimental results, as compared with portland cement usually confirm the mechanical and chemical properties excellent, it is expected be possible to apply to the undersea, underwater and underground structures that require superior durability. In addition, based on the excellent compressive strength by steam curing, it is expected to be possible to utilize as a cement replacement material in the secondary product of concrete. In the future, to solve the problem through continued research, it will be expected to reduce the effect of environmental load and to be excellent economics.

#### Acknowledgement

Supported by : 한국연구재단

#### References

1. Olivier, J., Trends in Global $CO_2$ Emissions, Publication No. 500114022, PBL Publichers, Bilthoven, 2012, pp. 10-21.
2. Song, J. T., "Hydration of Granulated Blast Furnace Slag in the Presence of $CaSO_4$," Journal of the Korean Ceramic Society, Vol. 17, No. 4, 1980, pp. 208-212.
3. So, Y. S., Mun, G. J., and Park, E. M., "Effect of Inorganic Stimulus Agent on Compressive Strength and Pore Structure of Blast Furnace Slag Cement," Journal of Architectural Institute of Korea, Vol. 17, No. 9, 2001, pp. 143-150.
4. Collins, F. and Sanjayan, J. G., "Early Age Strength and Workability of Slag Paste Activated by NaOH and $Na_2CO_3$," Cement and Concrete Research, Vol. 28, No. 5, 1998, pp. 655-664. (doi: http://dx.doi.org/10.1016/S0008-8846(98)00025-8) https://doi.org/10.1016/S0008-8846(98)00025-8
5. Lee, E. H., Jeong, C. I., Song, M. S., and Lee, K. H., "The Effect of pH on the Ettringite Formation," Journal of the Korean Ceramic Society, Vol. 39, No. 7, 2002, pp. 699-703. https://doi.org/10.4191/KCERS.2002.39.7.699
6. Mun, K. J., "Properties of Non-Sintered Cement and Concrete Recycled with Industrial Waste," Jeonbuk National University Doctorate Thesis, 2004, pp. 173-237.
7. Mun, K. J., Lee, C. W., So, S. Y., and Soh, Y. S., "Hydration Reaction of Non-Sintering Cement Using Inorganic Industrial Waste as Activator," Journal of the Korea Concrete Institute, Vol. 18, No. 2, 2006, pp. 267-274. https://doi.org/10.4334/JKCI.2006.18.2.267
8. 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. https://doi.org/10.1007/s10853-005-1821-2

#### Cited by

1. The Strength Properties Activated Granulated Ground Blast Furnace Slag with Aluminum Potassium Sulfate and Sodium Hydroxide vol.27, pp.2, 2015, https://doi.org/10.4334/JKCI.2015.27.2.095