Construction Sand

We all know only river/beach sand is valuable and growing in price every years. Imagine there is process to convert desert sand into construction sand: it will mean deserts become valuable resource deposits. It will be the new oil(oil is getting replaced by renewables). That process exists and is called "Finite" sand.
The problem is they keep the binder paste "secret"...
https://www.fastcodesign.com/90165549/the-next-great-building-material-it-could-be-sand-from-deserts
http://materialfinite.com/
https://materia.nl/article/finite-concrete-desert-sand/
These are current sand prices per ton
https://www.alibaba.com/showroom/construction-sand-price.html

>>16
That is about the same as normal lifespan and you can't recycle concrete.
``Steel and concrete bridges are usually constructed with a design life of between 50 and 100 years. ``