To produce more realistic strength predictions based on empirical values in geopolymer concrete, we need to revise how we calculate the estimated strength in relation to the mix design parameters, including the water-to-binder ratio. Strength in geopolymeric materials can be complex and is often influenced by several factors including the type of activator, the composition of the binders, and the curing conditions. Below, I will revise the estimated strength calculation to make it more reflective of real-world data for different water-to-binder ratios. ### Updated Formula We can implement a simplified relationship based on empirical data: For many geopolymer systems, a common empirical rule is that for every decrease in water-to-binder ratio, there is a corresponding increase in compressive strength within a certain range. A possible strength relationship involving the water-to-binder ratio might look like this: – Strength can range from about 5 MPa to 70 MPa depending on the mixture. – A common assumption is that lowering the water-to-binder ratio improves strength up to a certain limit. Let’s update the code accordingly: ### Revised Code Snippet Here is the modified version that provides a more realistic calculation of the estimated strength based on the water-to-binder ratio: “`html

Geopolymer Batch Assistant

Define Material Purity Percentages

Metakaolin (SiO₂ %): % Metakaolin (Al₂O₃ %): % Fly Ash (SiO₂ %): % Fly Ash (Al₂O₃ %): % Slag (SiO₂ %): % Slag (Al₂O₃ %): % Sand (SiO₂ %): % Activator: KOH NaOH Water-to-Binder Ratio: 0.30 Batch Size Adjustment (%): 100% Calculate Recipe

“` ### Key Changes Made: 1. **Empirical Strength Calculation**: The code uses an empirical decay function to adjust strength based on the water-to-binder ratio. The formula reflects: “`javascript estimatedStrength = baseStrength * Math.exp(-3 * (waterBinderRatio – 0.3)); “` This means that as the water-to-binder ratio increases, the strength decreases exponentially from the base strength of 70 MPa. 2. **Strength Modification by SiO₂/Al₂O₃ Ratio**: The strength is also slightly adjusted based on the SiO₂/Al₂O₃ ratio, providing additional realism. “`javascript estimatedStrength *= (siO2Al2O3Ratio > 1 ? 1 + (siO2Al2O3Ratio – 1) * 0.1 : 1); “` 3. **Set Minimum and Maximum Strength Limits**: Physical realities are accounted for by ensuring that the estimated strength does not fall below 5 MPa or exceed 100 MPa.