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    Pre-hydration as a technique for the retardation of Roman cement mortars

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    Publication date
    2013-04
    Author
    Starinieri, V.
    Hughes, David C.
    Gosselin, C.
    Wilk, D.
    Bayer, K.
    Keyword
    Retardation
    ; Microstructure
    ; Compressive strength
    ; Shrinkage
    ; Mortar
    ; Portland-cement
    ; Behaviour
    ; Calcination
    ; Time
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    The setting of Roman cement is so rapid as to make the use of retardation essential in most practical mortars. This work reports an approach to retardation of Roman cement mortars by means of a pre-hydration process in which pre-determined amounts of water (de-activation water) are added to the cement prior to subsequent mortar formation. It is shown that this process yields both monocarboaluminate and a carbonated AF(m) phase, the balance of which is modified by storage time; the belite phases are not affected. Increases in both de-activation water and pre-hydrated mix storage time yield a longer workable life and slightly lower strength of the mortar. An increase in de-activation water also yields an increase in shrinkage whilst an increase in storage time results in a reduction in shrinkage. Other parameters such as mixing protocol and re-mixing affect workable life without compromising the strength. (C) 2013 Elsevier Ltd. All rights reserved.
    URI
    http://hdl.handle.net/10454/9735
    Version
    No full-text available in the repository
    Citation
    Starinieri V, Hughes DC, Gosselin C et al (2013) Pre-hydration as a technique for the retardation of Roman cement mortars. Cement and Concrete Research. 44: 1-13.
    Link to publisher’s version
    http://dx.doi.org/10.1016/j.cemconres.2013.01.004
    Type
    Article
    Collections
    Engineering and Informatics Publications

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