The construction industry is at a point when it needs to find a balance between material performance and sustainability. Even though traditional concrete paver blocks are used in a lot of different places, people are still worried about how well they hold up under extreme mechanical and environmental stress. The fact that they aren't strong enough or last long enough, especially in places with bad weather or a lot of traffic, means that they need to be fixed or replaced often, which raises their lifetime costs. One of the most important challenges in construction is still the environmental impact of making cement. Metakaolin is an interesting answer to these problems, but we still don't know how to use it in the manufacturing of concrete paver blocks in the best way. Most of the study that has been done on how metakaolin affects concrete has been on normal concrete mixtures. There isn't much information available on how it works in paver block applications. Also, there hasn't been enough research on what the best amount of metakaolin is for getting the best mechanical qualities and durability without making the material harder to work with or more expensive. This study investigates the incorporation of metakaolin as a partial replacement for Ordinary Portland Cement (OPC) in the production of concrete paver blocks to enhance mechanical properties, durability, and sustainability. Metakaolin, a pozzolanic material derived from calcined kaolin clay, was introduced at replacement levels of 5%, 10%, and 15% by weight of cement. A comprehensive experimental program evaluated the influence of metakaolin on workability, compressive strength, flexural strength, water absorption, abrasion resistance, and density. Results indicated that a 10% metakaolin replacement offered the optimal performance, with improvements in compressive and flexural strength, reduced water absorption, enhanced abrasion resistance, and slightly increased density. While workability slightly declined with higher metakaolin content, it remained within acceptable limits due to the use of superplasticizers. The findings demonstrate that metakaolin not only improves the performance of concrete paver blocks but also contributes to sustainability by reducing cement consumption and associated carbon emissions. This research underscores the potential of metakaolin as a viable supplementary cementitious material for eco-efficient and durable concrete applications.
Metakaolin, Ordinary Portland cement Supplemental Cementitious Materials, Compressive strength, flexural strength, Abrasion Resistance.
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