In order to comply with current trends concerning sustainability, saving of primary materials and energyudsavings, this paper addresses Eco-concrete. The major focus thereby is on the increased efficiency of cementuduse. Applying a new mix design method for concrete, cement contents can be decreased and partially be substitutedudby other fine powders, preferentially by waste powders which have no mass application so far. Thisudpaper is giving examples of successfully introduced waste powders and characterizes the concretes producedudwith these powders. These innovative, low cement concrete types obtain medium strength and exhibit furthermoreudself-compacting abilities. This paper additionally highlights possibilities for the direct use of naturaludstone sludges or filter cakes. A new grading based design method, developed in the authors’ researchudgroup, enables the efficient use of all materials available. The method is applicable to self-compacting concretes,udearth-moist concretes and conventionally vibrated concretes.
展开▼
