Patent ID: 8394192

Claim:
A lightweight structural concrete comprising: a hydraulic binder; water; a superplasticizer; and aggregates; said concrete having a density varying from 1.40 to a D max value calculated according to formula (I) D max =1.58+( a×AM ) Formula (I) in which a represents a coefficient for which the value is equal to 1; AM represents the mass percentage of the amorphous materials contained in 1 m 3 of concrete; said concrete having a maximum density D max less than or equal to 1.85; said concrete having a W/L ratio varying from 0.19 to 0.46, where W represents the quantity of water in kg/m 3 of concrete; L represents the quantity of cement and additions in kg/m 3 of concrete, the additions selected from the group consisting of inert material and pozzolanic or latent hydraulic material and any mixture thereof; said concrete comprising a quantity of water varying from 100 to 230 l/m 3 of concrete; said concrete comprising a quantity of Portland clinker greater than or equal to 150 kg/m 3 of concrete; said concrete comprising a quantity of Portland clinker+optionally fly ash+optionally slag+optionally silica fume+optionally calcined shale+optionally calcined clays greater than or equal to 300 kg/m 3 of concrete; said concrete having a volume of paste greater than or equal to 300 l/m 3 of concrete; said concrete comprising from 1 to 16% by volume of air.