Quantificational Life Cycle Assessment Of Environmental Impact Of Construction Productions

Construction products are the fundamental element of architecture. Their production and application are closely related to human life and work. At the same time, in their various stages of the life cycle, construction products have close and extensive relationship with resources, energy and environment. Therefore, environmental impact assessment of production phase is not complete and its conclusion is wrong about life cycle assessment of environmental impact of construction productions. According to the technical framework of LCA in ISO14040 series standard, the thesis considers the specificity and the status of basic data on construction productions LCA, sets up the practical and simple evaluation manual in construction product LCA. The manual can assess construction products lifecycle environmental performance, provide quantitative tools for choosing the low environmental impact building materials and products in the design phase, offer data support for the recycling use of old building materials, define the quantitative standards of green building materials, and promote the further development of green building materials and eco-architecture.First of all, the thesis establishes the workable and simple LCA method of environmental impact of construction productions and determines the basic data that is required in LCA of building products (such as quantity, replacement coefficient, the type and quantity of building materials, etc.), the inventory database format of building products LCI and the basic parameters of building products LCA (such as impact category, characterization factors, normalized factors, weight coefficient, etc.).Secondly, the thesis depends on the status of environmental statistics, studies the possibility approachs to establish the inventory database of construction products LCI, explicit the ways to obtain the original data and the methods of converting raw data into database, and partially builds the lifecycle environmental inventory databases ofconstruction products. The databases include five inventory databases of building materials production, construction, use, waste disposal and transport and provide data support for construction products LCA.In addition, the thesis sets up the evaluation manual in LCA of environmental impact of construction products and guides non-LCA professionals in the construction-related field to assess construction products environmental performance. Using Excel 2007, the thesis compiles program of construction products LCA, entitled "building products LCA.xlsx", which is convenient for architecture designers to assess construction products environmental performance, shortens the evaluation time and improves accuracy of evaluation results.Finally, apartment house "Taihua areas" in Weifang City as example, the thesis comprehensively applies the inventory database, the evaluation manual and the program of construction products LCA, evaluates and compares the environmental performance of concretes, external windows and filled exterior walls, explicit the key factors influencing the environmental performance of construction products, guides the choices of green building materials and components and pertinently improves the lifecycle environmental performance of construction products.