The  project uses construction waste to produce recycled aggregate of different qualities and prepare recycled concrete. By studying the influence laws of recycled aggregate performance improvement and quality control technologies, recycled aggregate quality and replacement rate on the performance of recycled concrete, it has established a calculation formula including multiple influencing factors. The calculation formula for water consumption and strength of recycled concrete is proposed, and a full range of recycled concrete is proposed Mix design method for (recycled coarse aggregate concrete, recycled fine aggregate concrete and double mixed recycled aggregate concrete); By studying the change rules of mechanical properties of recycled concrete and combining the performance characteristics of recycled aggregate, the recycled concrete is innovatively proposed. Multiple interface structure model and research method; By comparing and analyzing the influence laws of environmental effects on the performance of recycled concrete, the performance damage mechanism of recycled concrete was discussed, and a scientific research method on the durability of multiple interface structures of recycled concrete was established.

 (This achievement was released by the Qingdao University Institute Technology Transfer Joint Office)