A Review on the Geopolymer Recycled Concrete

Geopolymer concrete has the outstanding characteristics of low carbon emissions and low energy consumption while utilizing industrial solid waste, and is expected to replace cement as a new generation of green building materials. Moreover, with the continuous increase in the amount of concrete, the environmental damage and resource depletion caused by the mining of sand and gravel aggregates have become increasingly serious. It is imminent to seek substitutes for natural sand and gravel aggregates. Combining green and environmentally friendly geopolymer concrete with recyclable recycled concrete technology is expected to reduce the negative impact of recycled aggregates. This paper summarizes and analyzes the relevant research results, comprehensively discusses the mechanical properties of geopolymer concrete and recycled concrete from the aspects of alkali activator, curing method, curing age, and raw materials, finally the research status of mechanical properties of geopolymer concrete mixed with recycled aggregate is summarized.