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Experimental study and modelling of heat evolution of blended cements


Reference:

Paine, K. A., Zheng, L. and Dhir, R. K., 2005. Experimental study and modelling of heat evolution of blended cements. Advances in Cement Research, 17 (3), pp. 121-132.

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    Official URL:

    http://dx.doi.org/10.1680/adcr.2005.17.3.121

    Abstract

    The advisability of controlling the temperature rise and fall in concrete at early age is well recognised, and the choice of an appropriate, low-heat cement with suitable heat of hydration characteristics can assist in this control. This is particularly pertinent with respect to water-retaining and massive concrete structures where the need to prevent early-age thermal cracking is paramount. Portland cement/ground granulated blast furnace slag (PC/ggbs) or PC/fly ash cements are often used in these structures due to their low heat hydration properties. This paper presents the results of isothermal conduction calorimetry tests carried out on PC/ggbs and PC/fly ash cements and describes a model that uses these results to simulate the heat evolution processes in hydration concrete sections at early ages. The tests covered a range up to 90% ggbs and up to 65% fly ash content by mass of cement, at temperatures from 5° to 60°C. For PC/ggbs cements, the total heat of hydration can be considered as a composition of three components, that is heats from an initial Portland cement reaction, a latent ggbs hydraulic reaction and co-reactivity effects of PC and ggbs; whereas for PC/fly ash cements, the initial PC reaction dominated with a small co-reactivity effect

    Details

    Item Type Articles
    CreatorsPaine, K. A., Zheng, L. and Dhir, R. K.
    DOI10.1680/adcr.2005.17.3.121
    DepartmentsFaculty of Engineering & Design > Architecture & Civil Engineering
    Publisher Statementadcr.2005.17.3.121.pdf: Permission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees.
    RefereedYes
    StatusPublished
    ID Code12920

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