Concrete with demanded amount of grains with size not exceeding 0.25 mm

摘要

The proposed concrete with demanded amount of grains with size not exceeding 0.25 mm of all components contained in such concrete contains in addition to fraction of coarse aggregates a an aggregate fraction 0-4 from at least two different sources, from which the aggregate fraction 0-4 of the first source contains 0.1 to 10 percent by weight grains with size up to 0.5 mm and 80 to 88 percent by weight grains with size exceeding 0.5 mm and the aggregate fraction 0-4 of the second source contains 5 to 30 percent by weight fine grains with size up to 0.25 mm and 15 to 60 percent by weight grains with size up to 0.5 mm and 40 to 85 percent by weight grains with size above 0.5 mm, whereby within the range of dosing 150 to 450 kg cement per one cubic meter of concrete the both sources mutual ratio ranges between 5 : 95 to 95 : 5 percent by weight.