TY - CONF A1 - Schmidt, Wolfram T1 - Sustainable cement extenders and SCMs T2 - Totally Concrete Expo T2 - Totally Concrete Expo CY - Johannesburg, South Africa DA - 2015-05-12 PY - 2015 AN - OPUS4-33564 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -