Research on Recycling Various Wastes in Papermaking as Eco-Friendly Slurry

Abstract

Waste recycling has always been a priority in the paper industry. In this study, the potential of translating various wastes in papermaking into building materials was separately evaluated. For the first time, the improvement of flexibility and sample texture after translating wastes into cementitious materials was analyzed. The results showed that 20% of the waste in alkali-activated slag slurry is the best proportion for papermaking. In addition, paper sludge and wood chips significantly improved the slurry flexibility while lime mud and bottom ash did not have this effect. Considering the effect of adding wood chips on the optimization of the sample texture, the most appropriate proportion of the paper sludge was 5% when the wood chips in the mixture were 15%. The most suitable alkali equivalent was 6%, with a silicate modulus of 0.9. According to the experimental results, wastes in papermaking had great potential for exploitation and application as circular materials.

Upcycling Fly Ash, Red Clay Brick Waste, and Paper Sludge as Feedstock for Manufacturing a Lightweight Extruded Composite: Design and Characterization

“…It has been reported that setting times are halved when the incorporated PC is increased from 5 to 15%wt. (solution/cement = 0.6) [22].…”

“…Calcined PS has been used as a precursor in the production of geopolymers and AAC, in combination with FA [16,17], GGBFS [16], bottom ash [18] or CDW [19]. PS ash has also been used as a pozzolanic complement to PC in mortars and concrete [20][21][22]. Incorporation of PS as a source of cellulose fibers in geopolymeric FA matrices [23] made it possible to form low-density, low-shrinkage drying composites by casting [24,25].…”