Your approach is too simplistic. If there was one big concrete...

Your approach is too simplistic. If there was one big concrete plant for all of Australia, and it was located near the magic mud mine, then it might be economically viable. That's assuming the concrete producers' capex and opex risks were low enough to justify risking the ROI.

As for the concrete property improvements, are they significantly above the standard error for the control group, enough to justify changing production methods? I've seen other companies reports for the magic mud. The economics vanish with shipping distance. Yea, sure, your magic mud has extra special properties. Probably unlike anything seen anywhere else. LOL. Truth is its just clay, and there just isn't enough market close by to be economical.