The recyclate comes from concrete drainage gutters.
Jakub Ďureje, Zdeněk Prošek, Jaromír Hrůza, Pavel Tesárek 2018, 'CEMENT MATRIX CONTAINING MICRONIZED RECYCLED CONCRETE AND THE INFLUENCE OF ADDITIVES',Acta Polytechnica CTU Proceedingshttps://ojs.cvut.cz/ojs/index.php/APP/article/view/5316. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)