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Journal articles
Gelation, Shear-Thinning and Shear-Thickening in Cement Slurries
Abstract : The rheological behavior of cement slurries may be described in terms of a few elementary behaviors: - the rapid formation of a gel, at rest; - the collapse of this gel under a critical stress directly related to the strength of the interparticle forces; - the progressive destruction of the gel fragments under moderate shear rate, with an increasingly shear-thinning behavior as the elementary particles gets smaller; - the reconstruction, at high shear rate, of shear-resistant structures, probably as chains of grains at contact; - complete jamming, possibly. We analyze the transition mechanisms from one step to the next one. We show how the addition of a dispersing agent favors shear-thickening at the expense of shear-thinning and how the control of the particle surface state and of interparticle friction restricts shear-thickening and the risk of jamming.
Cited literature [35 references]
https://hal-ifp.archives-ouvertes.fr/hal-02017282
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Submitted on : Wednesday, February 13, 2019 - 9:57:45 AM
Last modification on : Wednesday, November 17, 2021 - 12:33:05 PM
Long-term archiving on: : Tuesday, May 14, 2019 - 2:23:20 PM
Contributor : Edp Sciences Connect in order to contact the contributor
Submitted on : Wednesday, February 13, 2019 - 9:57:45 AM
Last modification on : Wednesday, November 17, 2021 - 12:33:05 PM
Long-term archiving on: : Tuesday, May 14, 2019 - 2:23:20 PM
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lootens_vol59n1.pdf
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