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Rheological Properties of Cement‐Based Extrudates with Fibers
Author(s) -
Li Zongjin,
Mu Bin
Publication year - 2001
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2001.tb01012.x
Subject(s) - die swell , plastics extrusion , materials science , rheology , cementitious , composite material , viscoelasticity , rheometer , extrusion , cement , viscosity , mixing (physics) , physics , quantum mechanics
To facilitate the application of the extrusion technique in the manufacture of short‐fiber‐reinforced cement‐based building products, the rheological behavior of the fresh cementitious extrudate in an extruder has been studied. In this study, the fresh cementitious extrudate was modeled as a viscoelastic material moving in a three‐dimensional extruder channel. The viscosity‐related and elasticity‐related material parameters were obtained using a homemade rheometer. The governing equations were linearized and solved numerically by the finite‐difference method, using the suitable velocity and stress boundary conditions. The velocity profiles of the fresh cementitious extrudates were obtained and discussed. These results were useful in guiding both the die design of an extruder and the mixing proportion design of cementitious composites.