Modeling of the composition of ecologically safe clay-gypsum binders Marat Asamatdinov, Andrey Medvedev, Alexey Zhukov, Ervand Zarmanyan and Alexey Poserenin MATEC Web Conf., 193 (2018) 03045 Published online: 20 August 2018 DOI: 10.1051/matecconf/201819303045