Your right... phantomThey don't get it...........it's a win win , I also think money will NOT be any problem
What are the benefits of pozzolans in concrete?
The use of pozzolans in cement brings several advantages: they increase late compressive strengths (providing adequate curing) and improve resistance to chemically-aggressive environments. They can also inhibit the alkali-silica reaction, which can cause serious damage to concrete structures.