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Title of Journal: J Therm Anal Calorim

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Abbravation: Journal of Thermal Analysis and Calorimetry

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Springer Netherlands

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ISSN

1572-8943

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Influences of fly ash and fluorgypsum on the hydra

Authors: Yan Yao DaoWu Yang JuLan Zeng LiXian Sun WenJian Li
Publish Date: 2011/06/03
Volume: 106, Issue: 3, Pages: 869-874
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Abstract

The hydration heat of pure cement fly ash singledoped cement as well as fly ash and fluorgypsum codoped cement were investigated by means of microcalorimetry with an eightchannel microcalorimeter The results showed that the hydration heat and the hydration rate could be reduced significantly by fly ash and fluorgypsum However the reduction was not proportional to the loading of dopant The exothermic peak of the codoped cement was appeared earlier than that of the singledoped cement As the temperature decreased the hydration heat and the hydration rate of both the doped cement were reduced and the exothermic peak appeared later The effect of fly ash and fluorgypsum on the compressive strength of cement was also investigated The results revealed that the early compressive strength of concrete made up of the codoped cement was largely higher than that of the singledoped cement Based on the experiment results obtained in this article we could conclude that fluorgypsum is a suitable additive for the singledoped cementThis study was financially supported by the National Natural Science Foundation of China 21003014 the Major Science and Technology Project of Hunan Province 2009FJ10093 2007NK3123 the Hunan Provincial Scientific and Technological Projects 2010CK3020 2010FJ3167 the Hunan Provincial Natural Science Foundation of China 09JJ3035 and the Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation Changsha university of Science Technology 20090011 2010CL07

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