DRY BUILDING COMPOSITION SUITABLE FOR WET SPREADING WITH THE HELP OF A SCREW PUMP AND CONTAINING A BINDER AND A FILLER OBTAINED FROM A BIOLOGICAL COMPOSITION, PREPARATION AND APPLICATION

摘要

A dry construction composition that is easily wet-sprayed by a screw pump to form an insulating and mechanically resistant material after hardening comprises: at least one binder that includes at least one primary binder comprising lime and/or at least one source of alumina and/or at least one source of calcium sulfate, at least one water retention agent, and preferably at least one surfactant; and at least one plant-based bio-based filler based on sunflower stalk and/or corn stalk and/or rape stalk, having a Bulk Density (BD) in kg/m3 that is less than 110. The ratio of the binder to the filler is between 2 and 9 in liters/kg. The composition can be mixed with water in a ratio of water/binder that is greater than or equal to 0.8 to form a wet composition. The wet composition can be sprayed onto a horizontal or vertical substrate or molded to a desired shape.