粉煤灰再生混凝土生命周期评价初探

Preliminary study of life cycle assessment of recycled concrete containing fly ash

本文使用生命周期评价(LCA)方法对掺与不掺粉煤灰的再生混凝土的环境影响进行评价。研究表明,再生混凝土是一种很好的环境材料(ecomaterial)。粉煤灰的掺入可以提高再生混凝土的绿色度。不掺粉煤灰的再生混凝土可以有效的减少油耗、CO、CxHy以及废弃物的排放,但并不能有效的减少混凝土的煤耗、CO2、NOx以及SO2排放量;而通过掺入粉煤灰可使再生混凝土的各项污染指标均得到有效的降低。

Using life cycle assessment (LCA),this paper presents the impact of recycled concrete (RC) containing fly ash on the environment.As is shown by the results,RC is an ecomaterial.By mixing fly ash,the green degree of RC can be improved.The RC without containing fly ash can reduce the consumption of oil and the discharge of CO,C_xH_y and waste efficiently, but can't reduce the consumption of coal and the discharge of CO_2,NO_x and SO_2 efficiently.However,by mixing fly ash,all the indexes mentioned above can be reduced efficiently.