Appraising the impacts of binary blends of limestone powder – metakaolin mixtures on the geomechanical behaviour of black fine-grained soil and its microstructural evolution
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Abstract
This study strives for the usage of zero - cement/lime binders on the geomechanical performance of black fine-grained soil ameliorated with the mixtures of waste derivatives. In a nutshell, this study is aimed at appraising the impacts of limestone powder (LP) and metakaolin powder (MP) on black expansive soil (BES) via mechanical and microstructural means. During the compaction testing, an increment in the dosage of additive materials resulted in a gradual increase in maximum dry density (MDDs) with a corresponding decline in optimum moisture contents (OMCs). The strength testing revealed that the incorporation of the LP-MP prompted a significant rate of improvement and it was affirmed through qualitative analysis. Furthermore, both the original and additive-treated soil materials were examined qualitatively via the means of scanning electron microscopy (SEM) and Energy dispersive spectroscopy (EDS) techniques. The result from the SEM testing indicates well-compacted soil chemistry whereas the EDS revealed higher peaks of aluminosilicate minerals which is a good pointer towards soil improvement.
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
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