Mechanical Properties and Degradation Mechanisms in Concrete Containing Metakaolin: A Critical Review
DOI:
https://doi.org/10.58987/yxfwvb98Keywords:
Metakaolin, Sustainable concrete, Mechanical properties, Pozzolanic reaction, Deterioration mechanismsAbstract
The increasing demand for concrete has intensified research efforts aimed at improving its various properties, such as strength, durability, service life, and sustainability requirements. This review addresses the role of using metakaolin (MK) as a partial replacement for cement in enhancing the mechanical properties and durability of concrete. This approach aims to reduce reliance on cement, which is one of the most costly and environmentally impactful components of concrete, while also promoting sustainability in the construction sector. Results from previous studies indicate that the incorporation of metakaolin (MK) in concrete mixtures leads to a noticeable improvement in concrete strength, with reported increases ranging from 10% to 20% compared to reference concrete. Concrete containing metakaolin has shown improved durability properties, including increased resistance to sulfate attack and reduced penetration of chloride ions and other harmful substances. On the other hand, studies have shown that the use of MK leads to higher water absorption and increased viscosity, which may result in a reduction in workability of up to 20%. This review concludes that metakaolin MK represents an effective option, particularly in regions where it is abundantly available, due to its significant role in enhancing durability and improving the mechanical properties of concrete.
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