Research on the reinforcement experiment of recycled aggregates based on particle shaping and vacuum cement coating

다국어 초록 (Multilingual Abstract)

Reinforcement of recycled aggregates stands as a pivotal strategy to stimulate their resource utilization. This study proposesa strengthening method of recycled aggregate combined with particle molding and vacuum cement coating, and the keycontrol parameters in the reinforcement process, resultant reinforcement outcomes, failure modes, and water absorptionkinetics were discussed. Experimental findings suggest that diminutive surface particle sizes present amplified challenges forshaping. The particle strength within each size categories demonstrates an initial ascent followed by descent with prolongedshaping, underscoring an optimal reinforcement duration. Excessive shaping precipitates a decline in the property of recycledaggregates, manifested through fracture, crush, and local damage. The moisture content of recycled aggregates undergoesfluctuations throughout the shaping process. Notably, the application of vacuum cement coating markedly ameliorateswater absorption post-particle shaping, thereby augmenting failure mode resilience. Building upon these observations, theframework of “moderate shaping,” “moderate damage,” and “damage-repair integration” is introduced for both internaland external reinforcement. This paradigm aims to bolster the particle strength of recycled aggregates, thus facilitating waterconservation during the scale-up preparation phase. This study can guide the establishment of production facilities tailoredfor recycled concrete and furnish insights for the scaled-up preparation of recycled concrete materials.