Experimental Study on the Strength and Stress–Strain Properties of Waste Concrete Fine Aggregate and Cement-Solidified Sludge

In this study, waste concrete fine aggregates and cement are applied to sludge solidification resource recycling. The unconfined compressive strength (UCS) test is performed investigate the variation in stress–strain properties of solidified with content particle size aggregate, content, curing time. results show that incorporating can improve UCS cement-solidified sludge, which achieve optimum effect when aggregate ranges from 12% 15%. However, compared time main factors improving (WCSS). curves WCSS comprise four stages. failure strain εf contents decreases a power function increase qu, mostly distributed 1.1–2.1%. A linear relationship observed between E50 qu. This study attempts promote recycling obtain excellent mechanical properties, providing some reference for practical engineering applications.