Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 이한승 | - |
dc.date.accessioned | 2023-12-22T01:51:42Z | - |
dc.date.available | 2023-12-22T01:51:42Z | - |
dc.date.issued | 2023-08 | - |
dc.identifier.citation | Thermochimica Acta, v. 726, article no. 179553, Page. 1.0-11.0 | - |
dc.identifier.issn | 0040-6031;1872-762X | - |
dc.identifier.uri | https://www.sciencedirect.com/science/article/pii/S0040603123001223?pes=vor | en_US |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/187842 | - |
dc.description.abstract | The maximum hydration heat release Qmax is one of the most concerned kinetic parameters for hydration of cementitious materials. In this study, we specially investigated the effect of the mathematical calculation approach, heat flow monitoring time, and fly ash (FA) content on the obtained Qmax values of FA cement paste. The isothermal hydration heat flows of cement paste with 0%, 20%, 40% and 60% FA contents have been monitored for 250 hours at 20 degrees C. Two conventional Qmax calculation approaches, including Knudsen's equation and the three-parameter exponential function, have been utilized to obtain Qmax values for different cementitious systems. The results indicate that irrespective of the calculation approach or monitoring time, mathematically derived Qmax linearly decreases along with the increase of FA content, which is consistent with the determined enthalpy of the binary cement system. Furthermore, the calculated Qmax increases with the extension of heat flow monitoring time, and different calculation approaches can yield varied Qmax values. However, the discrepancies between the two approaches gradually diminish as the monitoring time extends. It is recommended that for cement paste without FA addition, a minimum heat flow monitoring time of 7 days is necessary to obtain a reliable Qmax value using Knudsen's equation, while for the exponential function, a monitoring time exceeding 7 days is advised. For cement paste with FA addition, neither Knudsen's equation nor three-parameter exponential function can derive a relatively accurate Qmax value for FA within the limited heat flow monitoring duration in this study. | - |
dc.description.sponsorship | This research was supported by the Chinese Scholarship Council (CSC) and the National Research Foundation (NRF) of Korea grant funded by the Korean government (MSIT: Ministry of Science and ICT) (No. NRF-2018R1A5A1025137) . | - |
dc.language | en | - |
dc.publisher | Elsevier BV | - |
dc.subject | Fly ash (FA) cement | - |
dc.subject | Maximum heat releaseQmax | - |
dc.subject | Isothermal heat flow | - |
dc.subject | Monitoring time | - |
dc.title | Mathematical determination of the maximum heat release for fly ash cement paste: Effect of heat flow monitoring time, calculation approach and fly ash content | - |
dc.type | Article | - |
dc.relation.volume | 726 | - |
dc.identifier.doi | 10.1016/j.tca.2023.179553 | - |
dc.relation.page | 1.0-11.0 | - |
dc.relation.journal | Thermochimica Acta | - |
dc.contributor.googleauthor | Sun, Y. | - |
dc.contributor.googleauthor | Wang, Z. H. | - |
dc.contributor.googleauthor | Park, Dong-jin | - |
dc.contributor.googleauthor | Chen, Y. K. | - |
dc.contributor.googleauthor | Kim, Hansol | - |
dc.contributor.googleauthor | Kim, W. S. | - |
dc.contributor.googleauthor | Lee, Han Seung | - |
dc.sector.campus | E | - |
dc.sector.daehak | 공학대학 | - |
dc.sector.department | 건축공학전공 | - |
dc.identifier.pid | ercleehs | - |
dc.identifier.article | 179553 | - |
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