| Summary: | 碩士 === 國立中興大學 === 土木工程學系 === 86 === Till now, most of test methods used to determine the
workability and consistency of concrete are only available under
specific conditions, by they are not interchangeable. Therefore,
some researches have been made to describe the deformation
properties by using the rheological test method which interprets
the deformation of fresh concrete as shear stress-shear rate
relationships. Since high performance concrete (HPC) has
excellent fluid consistency, it should more suitable display the
deformation properties by using the rheological test method.
In this study, the self-developed rheometer was used for the
testing of fresh HPC. The variables include the proportion of
cementitious material, the filling ratios of sand and the
aggregate content. The result shows that three sets,
appropriate mix proportions of HPC are evaluated to have good
rheological behavior . Increase of paste content is
advantageous to the workability. Moreover, it can be evaluated
by means of the square correlation (R2) that the HPC will have
good rheological property, when it falls in the range of G≦0.05
and h≦0.01. So that it will also meet the domestic
requirements of HPC in slump and flow value.
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