They already do, with mixed results. This[1] is a coverage of a collaps of a parking structure in the city of Eindhoven, the Netherlands. Although it appears th

They already do, with mixed results. This[1] is a coverage of a collaps of a parking structure in the city of Eindhoven, the Netherlands. Although it appears the plastic-ball filled concrete was not the cause, but they way they incorporated it into the building was. 1. https://www.newcivilengineer.com/archive/technical-cause-of-airport-car-park-collapse-revealed-26-09-2017/ https://www.newcivilengineer.com/archive/technical-cause-of-...