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Title |
The CO2 Emission in the Process of Cement Manufacture Depending on CaO Content
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DOI |
https://doi.org/10.4334/JKCI.2013.25.4.365 |
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Keywords |
CO2 배출 ; 시멘트 ; 제조공정 ; CaO ; 강도 CO2 emission ; cement ; process control ; CaO ; strength |
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Abstract |
In this study, contents of limestone in cement manufactured by six domestic plants for Portland cement were investigated in terms of the strength and its relation to the CO2 emission due to limestone material and its physical properties in cement manufacturing process. the relationship among CaO content, compressive strength, and CO2 emission was surveyed for the limestone quantity in decomposition reaction and the loss of limestone quantity contained in each cement. As a result of CO2 emission calculation for unit cement, it was found that the CO2 emission due to decomposition of limestone was occupied 67% of total emission quantity. Furthermore, there was a difference in CO2 emission quantity depending on the cement manufacturing process management. Also, it was shown that fossil fuel usage and material loss had a major influence as main factors of CO2 emission. An increase in the CaO content in cement resulted in an increase in the compressive strength. On the contrary, CaO content and compressive strength were reduced with the growth of loss quantity of limestone. It was verified that the material and process management were more effective than CaO yield in cement manufacturing for CO2 emission with the growth of CO2 emission quantity. Pozzolanic materials such as PFA and GGBS in concrete mix affected the price, CO2 emission and development of strength of concrete.
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