What are Enhance's limits, and how should I use its results?

Enhance adjusts the quantities of the materials already in your mix. It doesn't add or swap materials, design for slump or select admixtures, and what it returns is a starting point for validation, not a pass/fail or guaranteed result.

• Add or swap materials. It changes quantities of the same materials. If you want a different material, edit the mix yourself first, then run Enhance on the updated mix.
• Design slump or select admixtures. Slump is an input. Enhance doesn't predict it or design toward it, and slump must be reached and verified by you in the field.
• Replace field verification.
• Work with silica fume or blends using two SCMs, which the strength model doesn't support.
• Guarantee a result. A returned mix is a starting point for validation.
• Cement, water, fine aggregate and coarse aggregate must all be present in the mix.
• Locked materials are kept at their quantities, within your limits.
• For the Lower cost goal, every plant material needs a price.

Enhance works within the limits you've set for w/cm, SCM replacement and paste content, and within any locked materials. Wider limits give it more room to find a mix. Narrower limits, or locks that conflict with them, make the "no feasible mix" messages more likely. If you don't get a result, the message tells you which limit to look at first.

1. Compare the original and enhanced mix designs side by side.

2. Check the tradeoffs against the project's priorities, for example cost, carbon and placement ratings.

3. Validate the mix with trial batches, laboratory testing and engineering review. Strength predictions apply within the range of mixes used to calibrate the model and don't replace them.

4. Verify slump in the field, because Enhance doesn't design for it.