Micro-properties and mechanical behavior of high-ductility engineered geopolymer composites (EGC) with recycled concrete and paste powder as green precursor

Construction waste contains a high proportion of concrete waste and cement paste waste. The reuse of ground recycled powder, namely recycled concrete powder (RCP) and recycled paste powder (RPP), for high-ductility engineered geopolymer composites (EGC) benefits the effective recycling of construction waste and reduces the needs for mineral precursors. RCP and RPP mainly consisted of C–S–H, SiO 2 and CaCO 3 , and RPP had better repolymerization activity than RCP in EGC. Incorporating an appropriate dosage of recycled powder as a substitute for both fly ash and ground granulated blast furnace slag (FA-GGBS) had no obvious impact on the micro-characteristics. However, replacing 100 % of FA-GGBS with recycled…

• NN
  National Natural Science Foundation of China

  Award: 52008364
• NS
  Natural Science Foundation of Jiangsu Province

  Award: BK20200957
• YU
  Yangzhou University