Abstract: Improper handling of construction waste has adverse environmental and social impacts. This article mainly focuses on construction waste used as road base material cured by PCSB (Poly Chem Soil Binder). The components of construction waste and the physical properties were analyzed. The compatibility between PCSB and construction waste solidification was discussed, and the optimum water content and maximum dry bulk density of the mix of PCSB and construction waste were studied. Specimens with a designed mix ratio of the PCSB and construction waste were made by means of instant formation and delayed formation. The specimens were cured under standard condition and room temperature. The unconfined compressive strength of water-saturated and unsaturated specimens were measured after curing for 7 days. It's concluded that construction waste cured by PCSB is of good water stability and condensation performance in delayed formation. The mixture with 7% of PCSB meets the standard requirement of unconfined compressive strength standards for pavement base and subbase of urban expressway and urban main road. Preparation of road base material by PCSB-stabilized construction waste is feasible.

Key words: construction waste, PCSB curing agent, road base material, unconfined compressive strength, degree of compaction, water stability