A composition of wet concrete, comprising from 140 to 220 l/m 3 of effective water in association with: - at least 10% by volume of dry binder premix comprising in mass proportions: • Portland clinker in the form of grains having a Dv97 ranging from 10 to 30 μm, the minimum amount of said clinker in mass percentage corresponding to the value determined according to formula 26 × ln Dv 97 k − 43 in which Dv97 k is the DV97 of the clinker expressed in μm; the total amount of clinker in the binder premix being strictly less than 60%; • blast furnace slag according to standard EN 197-1 paragraph 5.2.2 having a minimum glass content of 80%, ground to a minimum fineness SSB L of 2,500 cm 2 /g, whose minimum amount in mass percentage corresponds to the value determined according to formula 1,000 ÷ SSB L × − 90 × ln Dv 97 k + 310 in which Dv97 k is the Dv97 of the clinker expressed in μm, SSB L is the Blaine specific surface of the slag expressed in cm 2 /g • complementary materials having a Dv90 less than or equal to 200 μm chosen among limestone powders or fly ashes; • calcium sulfate; • 0.05 to 1.5% by mass of a thinning agent; and - up to 90% by volume of aggregates comprising sand and gravel, the mass ratio of the amount of sand to the amount of gravel being comprised between 1.5:1 and 1:1.8; the percentages corresponding to proportions relative to the total dry volume. - at least 10% by volume of dry binder premix comprising in mass proportions: • Portland clinker in the form of grains having a Dv97 ranging from 10 to 30 μm, the minimum amount of said clinker in mass percentage corresponding to the value determined according to formula 26 × ln Dv 97 k − 43 in which Dv97 k is the DV97 of the clinker expressed in μm; the total amount of clinker in the binder premix being strictly less than 60%; • blast furnace slag according to standard EN 197-1 paragraph 5.2.2 having a minimum glass content of 80%, ground to a minimum fineness SSB L of 2,500 cm 2 /g, whose minimum amount in mass percentage corresponds to the value determined according to formula 1,000 ÷ SSB L × − 90 × ln Dv 97 k + 310 in which Dv97 k is the Dv97 of the clinker expressed in μm, SSB L is the Blaine specific surface of the slag expressed in cm 2 /g • complementary materials having a Dv90 less than or equal to 200 μm chosen among limestone powders or fly ashes; • calcium sulfate; • 0.05 to 1.5% by mass of a thinning agent; and • Portland clinker in the form of grains having a Dv97 ranging from 10 to 30 μm, the minimum amount of said clinker in mass percentage corresponding to the value determined according to formula 26 × ln Dv 97 k − 43 in which Dv97 k is the DV97 of the clinker expressed in μm; the total amount of clinker in the binder premix being strictly less than 60%; in which Dv97 k is the DV97 of the clinker expressed in μm; the total amount of clinker in the binder premix being strictly less than 60%; • blast furnace slag according to standard EN 197-1 paragraph 5.2.2 having a minimum glass content of 80%, ground to a minimum fineness SSB L of 2,500 cm 2 /g, whose minimum amount in mass percentage corresponds to the value determined according to formula 1,000 ÷ SSB L × − 90 × ln Dv 97 k + 310 in which Dv97 k is the Dv97 of the clinker expressed in μm, SSB L is the Blaine specific surface of the slag expressed in cm 2 /g in which Dv97 k is the Dv97 of the clinker expressed in μm, SSB L is the Blaine specific surface of the slag expressed in cm 2 /g • complementary materials having a Dv90 less than or equal to 200 μm chosen among limestone powders or fly ashes; • calcium sulfate; • 0.05 to 1.5% by mass of a thinning agent; and - up to 90% by volume of aggregates comprising sand and gravel, the mass ratio of the amount of sand to the amount of gravel being comprised between 1.5:1 and 1:1.8;