Characterization and Modeling Using Non-Destructive Test (NDT) and Experimental Design Methods of a Self Compacting Concrete (SCC) Based on Mineral Additions
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Date
2022
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Abstract
The formulation of an innovative concrete that meets the requirements of a self compacting concrete (SCC), with acceptable performance in terms of rheology in the
fresh state; good fluidity, ease of placing, without segregation as well as good mechanical
strength and durability at hardened state has become of great research interest for the last
decades. Numerous studies have shown the favorable effects of limestone fillers on the
SCC properties. This study aims at investigating the effect of inert mineral addition of
limestone fillers with dosages of 10% and 20% grinded to different fine nesses 2000,
3000 and 4000 cm2
/g on the physico-mechanical properties of a fresh self-placing
concrete using slump, the L-box and the sieve stability tests. Also, the means of
destructive and non-destructive tests (NDT) methods to the assessment of the mechanical
performances of SCC at hardened state were used. The use of experiment factorial
design method allows us to have behavior laws to predict the mechanical strength
response when combined with (NDT) according to a numerical model in such study.
Hence, a numerical modeling of mechanical response could be derived by such statistical
analysis in regards to the effects of factors and their interaction. The results obtained
showed that the incorporation of limestone filler in the composition of the SCC improves
the fluidity with limited segregation, as well as the good mechanical performances
(resistance to compression and flexion). The numerical modeling of the predicted
compressive strength response, in particular at the age of 28 days, is judged to be with an
acceptable determined coefficient R2
equal to 0.994.
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Keywords
SCC, experimental design method, limestone fillers, modeling, mechanical response, non destructive testing (ND