作为建筑垃圾废物流的核心成分，惰性建筑垃圾通常采用填埋方式处置，导致土地占用、环境影响等问题。再生利用是解决这些问题的有效方式。但现阶段，惰性建筑垃圾的再生利用过程具有显著的外部性，致使传统的经济分析无法为改进惰性建筑垃圾的再生利用提供明确的决策依据。我们拟构建生命周期评价（LCA）与生命周期成本分析（LCC）集成的系统分析模型，采用影响路径法和支付意愿法，将环境影响转换成环境成本，LCC则用于分析系统边界内的经济成本。我们将该模型用于比较惰性建筑垃圾再生技术和分析西宁市惰性建筑垃圾管理，拟阐明再生技术方案评价结果与惰性建筑垃圾本身技术性能间的关系，揭示再生利用率与惰性建筑垃圾管理系统评价结果间的关系，为合理选择惰性建筑垃圾再生技术、改进惰性建筑垃圾管理决策和政策制定提供依据。

As the vast majority of construction & demolition waste (CDW), the inert CDW like concrete, bricks, mortar, tiles and ceramics will be sent to C&D landfills. Its continuously increasing quantity has placed great burden on the finite landfill space and environment. The most effective way to reduce the waste problem is agreed in recycling the debris. At present, the recycling of inert CDW shows obvious externalities, therefore traditional economic analysis will be unable to provide comprehensive decision basis for improving the recycling of inert CDW. There is a need for systematic approach to investigate the efficiency of recycling inert CDW to achieve the integration between economic and environmental effects. This study will present a life cycle-based framework to determine the optimal inert CDW waste recycling alternative. In addition, the framework will also be used to make a comprehensive evaluation of approaches to inert CDW management in Xining City. The framework consists of an environmental life cycle costing (ELCC) and a financial life cycle costing (FLCC) using the same unit of account under the same system boundaries. The ELCC is thus here represented as the external cost estimates based on an application of the impact pathway approach, enhanced by earlier experience from extensive Life Cycle Assessment (LCA), and the willingness-to-pay approach as a supplementary for those impacts without actual measurable market. The FLCC involves all costs for fulfilling the functional unit(s) other than when those environmental effects have an economic impact on the system studied to make sure that no double counting takes place. A mass flow model will be used to account for all of the incoming and outgoing mass for each process in inert recycling systems as well as an inert CDW management system, then the material flow data can incorporate with the FLCC and ELCC data associated with each management activity to provide an economic analysis for proposed CDW management scenarios with different degree of recycling options. This study will ascertain the relationship between the evaluation results and the grade of original technical performance of inert CDW, which is useful for evaluating the range of application of each recycling solution. We will reveal the inherent laws to which the recycling rate varies with inert CDW management options. The objective is that the life cycle-based method can act as a decision-support tool for policies innovation to improve the recycling activities of inert CDW.