Current Methods for the Utilization of the Fresh Concrete Waste Returned to Batching Plants

摘要

As the fresh concrete waste has a high potential to damage the environment, current methods for the utilization of the returned ready-mixed concrete were presented throughout this study. Toward this aim, an in-depth literature review was performed as a methodological approach. Thus, types of the returned concrete were first explained and the existing methods were then discussed one by one. Consequently, the current methods were determined as (i) matching with suitable customers, (ii) blending with next matches, (iii) discharging into the settling basin, (iv) discharging onto the ground, (v) producing pre-cast concrete components, (vi) recycling mechanically, (vii) using the hardened slurry cake in concrete, (viii) using the hardened slurry cake in partition wall blocks, (ix) using hydration stabilizer admixtures, and (x) using superabsorbent polymer.