Experimental assessment with data-driven machine learning-based prediction of compressive strength of waste natural fiber-reinforced sustainable concrete.

Figure 14 b shows a more complex and generally exhibits a negative trend, with the fine aggregate content increasing from 150 to around 1050 kg/m3, the CS drops from about 34.5 MPa to nearly 32.5 MPa, indicating that excessive fine aggregate reduces strength by affecting packing density or increasing water demand.

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