Co-Extrusion of Cement -Based Materials to Achieve Functionally Graded Microstructure
Chen, Yunbo
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https://hdl.handle.net/2142/83336
Description
Title
Co-Extrusion of Cement -Based Materials to Achieve Functionally Graded Microstructure
Author(s)
Chen, Yunbo
Issue Date
2007
Doctoral Committee Chair(s)
Leslie Struble
Department of Study
Civil Engineering
Discipline
Civil Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Civil
Language
eng
Abstract
Clay was explored to replace commonly used cellulose plasticizer in order to solve the problem of air voids associated with cellulose. The effect of clays on plasticizing cementitious pastes was evaluated by rheological and zeta potential measurements. Only zeta potential was found to be valuable to assess the effectiveness of clay as a plasticizer. The PGN clay, which had high amount of montmorillonite, with combination of silica fume, polyethylene glycol and superplasticizer was found to be efficient to reduce air voids in extrudates.
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