粉煤灰基地质聚合物混凝土和普通混凝土温室气体排放量的对比研究

Comparative study on the greenhouse gas emissions of geopolym erconerete baded on flyash and ordinary concrete

因普通混凝土用水泥作为胶凝材料致使其温室气体排放量高。粉煤灰在碱激活剂的作用下可以作为辅助胶凝材料替代水泥拌制地质聚合物混凝土,该种混凝土具有降低温室气体排放量的潜力。对比研究生产1 m3粉煤灰基地质聚合物混凝土和普通混凝土的温室气体排放量。研究表明:地质聚合物混凝土的二氧化碳当量要比普通混凝土低15%,地质聚合物混凝土的温室气体排放主要集中在碱激活剂的制备和后期高温养护,约占总排放量的90%。

Because concrete for construction has traditionally been based on an ordinary portland cement(OPC)binder,it has become main contributor of greenhouse gas emissions to environment.Geopolymer,an alternative binder based on fly ash,that is activated by an alkaline activator,have potential to lower the significant carbon footprint of OPC concrete.It presents the comparative results of greenhouse gas emissions estimates for both geopolymer concrete and OPC concrete.The study shows that the CO2 equivalent of the geopolymer concrete is less than OPC concrete 15%,and the greenhouse gas emissions of geopolymer concrete is mainly concentrated in the preparation of alkali activator and the high temperature curing,accounting for 90%of the total emission.