钢渣资源化的微表处养护技术环境影响量化分析

Quantitative Analysis of Environmental Impacts of Micro Surfacing Maintenance with Steel Slag Recycling Technology

文中基于全生命周期评价(LCA)方法建立了微表处养护的环境影响量化框架,利用原子吸收光谱仪(ICP)评估钢渣集料和两种天然集料的重金属排放特性,基于LCA分析框架量化对比了钢渣集料和玄武岩的微表处养护的能耗和碳排放量.结果表明:钢渣集料重金属排放高于玄武岩和石灰岩,但陈化处理后其重金属浓度符合我国地表水第III类水要求.同时,在功能单位内玄武岩微表处养护能耗为47.25 GJ,伴随产生2749.52 kg当量CO 2,而钢渣微表处消耗47.15 GJ,产生2848.72 kg当量CO 2原材料生产阶段的显著差异导致玄武岩比钢渣集料微表处养护产生更多的能耗,但排放了更少的当量的CO 2.

Based on the life cycle assessment(LCA)method,a quantitative framework of environmental impact of micro-surfacing maintenance was established.Atomic absorption spectrometer(ICP)was used to evaluate the heavy metal emission characteristics of steel slag aggregate and two kinds of natural aggregate,and the energy consumption and carbon emission of micro-surface curing of steel slag aggregate and basalt were quantitatively compared based on LCA analysis framework.The results show that the heavy metal emission of steel slag aggregate is higher than that of basalt and limestone,but its heavy metal concentration after aging treatment meets the requirements of Class III surface water in China.At the same time,the energy consumption of basalt micro-surface maintenance in functional units is 47.25 GJ,accompanied by 2749.52 kg equivalent CO 2.However,47.15 GJ is consumed at the micro surface of steel slag,and 2848.72 kg equivalent CO 2 is produced.Significant differences in the production stages of raw materials lead to more energy consumption of basalt than micro-surfacing maintenance of steel slag aggregate,but less equivalent CO 2 emission.