Zhang Qinli, Zhang Bingyi, Wang Daolin
School of Resources and Safety Engineering, Central South University, Changsha 410083, China.
Materials (Basel). 2022 Aug 3;15(15):5359. doi: 10.3390/ma15155359.
This study aimed to investigate the environmental impact of modified granulated copper slag (MGCS) utilization in blended cement production at a representative cement plant in China. Sensitivity analysis was performed on the substance inputs, and the life cycle impact assessment (LCIA) model was applied. A detailed comparative analysis was conducted of the environmental impact of cement production in other studies, and ordinary Portland cement production at the same cement plant. Results showed that calcination has the largest contribution impact of all the impact categories, especially in causing global warming (93.67%), which was the most prominent impact category. The life cycle assessment (LCA) result of blended cement was sensitive to the chosen LCIA model and the depletion of limestone and energy. In this study, producing blended cement with MGCS effectively mitigated the environmental impact for all the selected impact categories. Results also show a reduction in abiotic depletion (46.50%) and a slight growth (6.52%) in human toxicity. The adoption of MGCS in blended cement would therefore generally decrease the comprehensive environmental impact of cement, which contributes to the development of sustainable building materials.
本研究旨在调查在中国一家具有代表性的水泥厂中，改性粒化铜渣（MGCS）用于混合水泥生产时的环境影响。对物质输入进行了敏感性分析，并应用了生命周期影响评估（LCIA）模型。对其他研究中水泥生产以及同一水泥厂普通硅酸盐水泥生产的环境影响进行了详细的对比分析。结果表明，在所有影响类别中，煅烧的贡献影响最大，尤其是在导致全球变暖方面（93.67%），这是最突出的影响类别。混合水泥的生命周期评估（LCA）结果对所选的LCIA模型以及石灰石和能源的消耗较为敏感。在本研究中，用MGCS生产混合水泥有效地减轻了所有选定影响类别的环境影响。结果还显示非生物资源耗竭减少了（46.50%），而人体毒性略有增加（6.52%）。因此，在混合水泥中采用MGCS通常会降低水泥的综合环境影响，这有助于可持续建筑材料的发展。
