Ultra-high performance concrete and high performance construction materials : proceedings of HiPerMat 2016 4th International Symposium on Ultra-High Performance Concrete and High Performance Materials Kassel, March 9-11, 2016 - Fehling, E.; Middendorf, B.; Thiemicke, J. (Schriftenreihe Baustoffe und Massivbau, 2016)