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- W641176834 abstract "Injecting liquid nitrogen (LN2) into fresh concrete in a truck agitator is one method of precooling concrete. However, since the temperature of LN2 is -196 degrees C, the influence on hydration of cement subjected to this cryogenic temperature will be a matter of concern at times. In this study, three precooling measures were taken such as cooling by LN2, air-cooling materials before mixing, and adding ice chips in place of a part of mixing water, and the differences in strengths, microstructures and rate of hydration of hardened cement paste in each case were investigated. The results were as follows: (1) The difference in cooling methods when cooling concrete to the same degree does not influence strength, microstructure, and rate of hydration of cement paste. (2) Even when cooled down to almost 0 degrees C by LN2, both concrete and cement paste show good strength development properties. (A) For the covering abstract of the conference see IRRD 853062." @default.
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- W641176834 date "1992-01-01" @default.
- W641176834 modified "2023-09-23" @default.
- W641176834 title "STRENGTH DEVELOPMENT AND MICROSTRUCTURE OF CEMENT AND CONCRETE PRECOOLED WITH LIQUID NITROGEN" @default.
- W641176834 hasPublicationYear "1992" @default.
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