Li Xiaoyu, Liu Huiyang, Xing Jinxin, Gan Min, Ji Zhiyun, Fan Xiaohui, Sun Zengqing
School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China.
Engineering Research Centre of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and Utilization, Changsha 410083, China.
Materials (Basel). 2024 Aug 20;17(16):4113. doi: 10.3390/ma17164113.
Concrete production is associated with extensive energy consumption and significant CO emissions. In addition, tremendous amounts of freshwater are used as a mixing agent. Urgency is increasing to develop sustainable cementitious materials and promote freshwater-saving strategies. An environmentally friendly alternative binder, seawater mixed with one part alkali activated material, is studied. In this work, a cradle-to-gate life cycle assessment was applied to study the equivalent CO emission and cost properties of the clinker-free binder. The seawater mixed mortar possesses comparable mechanical properties to Portland cement, with 3 d flexural and compressive strengths of 5.3 MPa and 25.2 MPa. In addition, the mortar developed in this work is of similar cost as commercial cement, but reduces CO emissions by 44.8%.
混凝土生产伴随着大量的能源消耗和显著的二氧化碳排放。此外，大量淡水被用作混合剂。开发可持续胶凝材料和推广节水策略的紧迫性日益增加。研究了一种环保替代粘结剂，即海水与一份碱激活材料混合。在这项工作中，应用从摇篮到大门的生命周期评估来研究无熟料粘结剂的等效二氧化碳排放和成本特性。海水混合砂浆具有与波特兰水泥相当的力学性能，3天抗折强度和抗压强度分别为5.3MPa和25.2MPa。此外，这项工作中开发的砂浆成本与商业水泥相似，但二氧化碳排放量减少了44.8%。
