RHEOLOGICAL STRENGTH AND DURABILTY PROPERTIES OF SELF-COMPACTING CONCRETE (SCC) INCORPOPRATING METAKAOLIN AND LIMESTONE ADDITIONS: A CASE STUDY OF 60% REPLACEMENT OF LIMESTONE WITH METAKAOLIN.
Abstract
This study investigated the rheological strength and durability properties of self-compacting concrete incorporating metakaolin and limestone additions. Metakaolin, a by-product of the kaolin clay calcinations process, has gained attention as a supplementary cementitious material (SCM) in concrete due to its pozzolanic activity and its positive impact on concrete strength and durability. Metakaolin, a pozzolanic material, was added to the concrete mix as to enhance its strength and durability. A grade of concrete (60MPa) was used, and the compressive strength, workability and durability were measured and compared with the control mix.
The results showed that the addition of metakaolin improved the flexural strength, modulus of elasticity, and toughness of all three concrete grades compared to the control mix. However, the extent of improvement was different for each grade, with the 60MPa grade exhibiting the highest improvement.
In summary, metakaolin addition improves both compressive and split tensile strength of concrete, but the correlation between strength and metakaolin content is stronger for compressive strength. Further research is needed to understand the underlying mechanisms and optimize the proportion of metakaolin for specific applications.
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