Development and Application of a High-Volume Recycled Powder Solidifying Material for Waterworks Sludge

Recycled powder (RP) is produced as a by-product during the process of recycling construction and demolition (C&D) wastes, presenting low additional value. Using RP-based solidifying material can not only improve its utilization efficiency, but also reduce cost commercial materials. To date, this best utilized to dispose original waterworks sludge (OWS) with high moisture contents (60%), product could be used fabricate non-fired bricks. This has become new environment-friendly technology “using waste treat waste”. In paper, influence different particle sizes dosages RP on prepared was studied. Besides, unconfined compression strength (UCS), volume stability, chemical composition, heat hydration, pore structure were characterized. Then, bricks by using material, recycled aggregate, sludge. The UCS softing coefficient (SC) evaluated. As result, 28-day optimal (M30) 35.40 MPa, which reach 84.37% Portland cement (PC). addition increased stability material. large amount reduced flux cumulative release while porosity increased. brick (NF20) in 28 days 15.19 MPa SC after 78.35%. conclusion, preparation promising approach great potential disposal