Comparative Life Cycle Assessment between Ordinary Gypsum Plasterboard and Functional Phase-Change Gypsum Plasterboard

摘要

With the emphasis of national policies on green manufacturing and the recognition of the people for green development, expanding the green assessment of products will be the general trend. In this study the life cycle assessment method was used to compile a list of resources, energy consumption and pollutant emissions during the life cycle of typical ordinary gypsum plasterboard and functional phase-change gypsum plasterboard, the key environmental impact indicators of both products during the life cycle calculated, the key stages affecting the environmental performance of products analyzed and identified, and the difference in environmental impacts between phase-change gypsum plasterboard and ordinary gypsum plasterboard compared and analyzed, for guiding the selection of green building materials and the development of ecological building materials. The results show that the global warming potential of phase-change gypsum plasterboard is 3.42 kgCO_2 equivalent/m~2, the non-renewable resource depletion potential is 2.25×10~(-5) kgSb equivalent/m~2, the respiratory inorganic is 1.97×10~(-3) kgPM_(2.5) equivalent/m~2, the eutrophication is 1.21×10~(-3) kgPO_4~(3-) equivalent/m~2, and the acidification is 9.47×10~(-3) kgSO_2 equivalent/m~2. Compared with ordinary gypsum plasterboard, the phase-change gypsum plasterboard shows the biggest increase by 874.03% in non-renewable resource depletion potential. The major environmental impact of ordinary gypsum plasterboard in the life cycle is mainly from energy use, and the transport process is the main stage of eutrophication. The use of phase-change materials in the phase-change gypsum plasterboard is the main stage causing environmental impact.