> To make it, construction and demolition waste including bricks, gravel, sand and plasterboard is crushed and mixed with water and a binder I notice they don'

> To make it, construction and demolition waste including bricks, gravel, sand and plasterboard is crushed and mixed with water and a binder I notice they don't mention what the binder is, and I see it labeled as a "secret binder" in another article.