Abstract: The invention relates to a composition for building construction comprising a paper sludge deriving from de-inked paper recycling processes, the sludge having a grain size distribution D90 in the range of 30 to 1000 ?m and an ingredient selected from the group consisting of modified cellulose, cement, furnace slag and mixtures thereof.

Abstract: The invention relates to a composition for building construction comprising a paper sludge deriving from de-inked paper recycling processes, the sludge having a grain size distribution D90 in the range of 30 to 1000 ?m and an ingredient selected from the group consisting of modified cellulose, cement, furnace slag and mixtures thereof.

Abstract: The present invention relates to a method and an apparatus to produce solid particulate material from solid particulate components. The components are metered and mixed according to a desired recipe. After having been mixed the material is metered and packaged in a suitable form, e.g. in bags. The apparatus (10) comprises a stationary casing (32) provided with a rotating mixing tool (40), a discharge valve (50) mounted on the bottom of said mixer (30) and a metering and packaging unit (70). The method is particularly suitable to manufacture solid particulate material by mixing low-value components available in any site and high-value components, such as materials for use in the building and construction field.