Optimization of concrete with human hair using experimental study and artificial neural network via response surface methodology and ANOVA.

Table 2 illustrates that all mix design ratios—specifically the water-to-cement (W/CT), water and cement-to-aggregate (W + CT/A), and fine-to-coarse aggregate (FA/CA) ratios—exhibited highly significant effects on compressive strength (CS) ( p = 0.000).

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