摘要：随着国家绿色低碳总体发展战略目标的提出与推进，传统建筑行业不断受到资源、能源、劳动力、工程质量等多重因素的影响，为了寻找建筑领域节能减碳路径，装配式混凝土结构应运而生。为研究装配式混凝土结构建材碳排放情况，本文选取两个不同装配率的装配式建筑，基于全生命周期评价（LCA）理论，借助PKPM软件，分别对装配式混凝土结构与模拟建立的现浇混凝土结构中主要建材产品的碳排放情况进行计算，分析两种结构及两种装配率的建材碳排放情况。研究发现，装配式混凝土结构比现浇混凝土结构建材碳排放要低，平均减碳率在5%左右，且减碳率随着装配率的提升而提高，装配率越高，减碳效果越好。从建筑全生命周期来看各阶段建材减碳量，生产阶段、回收利用阶段、运输阶段分别占66%、23%和1%，生产阶段影响最大且随着装配率的提升而提高，回收利用阶段随着装配率的提升而降低，说明装配式混凝土结构对于节能减碳有积极意义。

关键词：全生命周期评价（LCA）；装配式混凝土结构；碳排放；装配率

Abstract：With the proposal and advancement of the national overall development strategy of green and low-carbon，the traditional construction industry has been continuously affected by multiple factors such as resources，energy，labor force，and engineering quality. In order to find the energy-saving and carbon-reduction path in the construction field，prefabricated concrete structures have emerged. To study the carbon emissions of building materials in prefabricated concrete structures，this paper selects two prefabricated buildings with different assembly rates. Based on the theory of Life Cycle Assessment（LCA），and with the help of PKPM software，the carbon emissions of the main building materials in prefabricated concrete structures and the simulated cast-in-place concrete structures are calculated respectively，and the carbon emissions of building materials in the two structures and the two assembly rates are analyzed. It is found that the carbon emissions of building materials in prefabricated concrete structures are lower than those in cast-in-place concrete structures，with an average carbon reduction rate of about 5%，and the carbon reduction rate increases with the increase of the assembly rate，the higher the assembly rate，the better the carbon reduction effect. From the perspective of the carbon reduction of building materials in each stage of the building's entire life cycle，the production stage，the recycling and utilization stage，and the transportation stage account for 66%，23%，and 1% respectively. It can be seen that the production stage has the greatest impact，and it increases with the increase of the assembly rate. The recycling and utilization stage decreases with the increase of the assembly rate，indicating that prefabricated concrete structures have a positive significance for energy conservation and carbon reduction.

Keywords：Life Cycle Assessment（LCA）；prefabricated concrete structure；carbon emissions；assembly rate

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