建設副産物のリサイクルに関わる物質フローと環境負荷の算定手法に関する研究

本研究分析了个别工业区的材料和废物的质量流，以评估包含较大工业区的材料流模型。1994年，这些地区包括日本25至40个县。我们使用总排放率或工业废弃物排放率作为环境负荷项，以创建能够评估区域可持续性的指标。还比较了每个工业类别的工业废物产生情况。垃圾总量与各都道府县物质投入总量之间的关系表明，垃圾总量约占各都道府县物质投入总量的10%。通过研究30年生命周期内路面运营的环境负荷和成本因素，研究了路面维修的可选方案。结果表明，在路面建设和维修中使用再生材料可使整个生命周期内的环境负荷影响减少约40%。此外，据观察，与沥青路面的维护维修阶段相关的环境负荷条件包括50%的总环境负荷确定为30年的生命周期。相反，维护维修阶段的成本占总寿命周期成本的40%。最后，结果表明，环境负荷和成本的考虑将得到改善，并在生命周期内更有效地，如果建立一个定期的维护例行简单的沥青维修。

This study analyzed the mass-flow of material and waste in individual industrial regions to evaluate a material flow model encompassing the larger industrial area. The regions included 25-40 Japanese prefectures in 1994. We used the emission rate of total or industrial waste as an environmental loading item, in order to create an indicator capable of evaluating regional sustainability. Generation of industrial waste was also compared in each industrialcategory. The relationships between total waste volume and the total material input of the objected prefectures imply that total waste corresponds to nearly 10% of the total material input generated in every prefecture. An optional scheme of road paving maintenance was investigated by examining the environmental loading and cost considerations of pavement operations over a 30-year life cycle. Results indicated that the application of recycled materials in pavement construction and repair reduced the effects of environmental loading over the life cycle by approximately 40%. Furthermore, it was observed that environmental loading conditions associated with the maintenance repair stage of asphalt paving comprised 50% of the total environmental loading determined for the 30-year life cycle. Conversely, costs of the maintenance repair stage were 40% of the total life cycle costs. Finally, results suggest that environmental load and cost considerations will be improved and made more efficient over a life cycle period if a regular maintenance routine of simple asphalt repairs is established.