摘要
为研究砌体结构的物化碳排放指标,促进砌体结构的低碳发展,以墙体体积和长度为功能单位,采用基于过程的方法建立物化碳排放指标计算模型,并结合工程消耗量定额与现场实测数据对比分析烧结页岩空心砖砌体、混凝土实心砖砌体、蒸压加气混凝土砌块砌体、混凝土小型空心砌块砌体、配筋砌块砌体和装配式配筋砌块砌体6种砌体墙的碳排放指标.结果表明,单位体积或长度的约束砌体碳排放指标明显高于无筋砌体,但提供相同竖向承载力的碳排放指标仅为无筋砌体的71%左右.此外,材料生产和运输是砌体结构物化碳排放指标的主要影响因素,发展轻质、低碳、可循环、本地化的块体材料可有效降低碳排放.
Abstract
To study carbon emission indicators in the materialization stage and promote the low-carbon development of masonry structures,a process-based method is applied to establish a calculation model for carbon emission indicators,considering the volume and length of walls as functional units.Based on the engineering construction quota and on-site measured data,carbon emission indicators of six types of masonry walls,including sintered shale hollow brick masonry,concrete solid brick masonry,autoclaved aerated concrete block masonry,concrete hollow block masonry,reinforced concrete block masonry,and prefabricated reinforced concrete block masonry,were compared.The results indicate that carbon emission indicators per unit volume or length of confined masonry are significantly higher than those of unreinforced masonry.However,carbon emission indicators that provide the same vertical bearing capacity are only about 71%of those of unreinforced masonry.Moreover,material production and transportation are the main influencing factors for carbon emission indicators in the materialization stage of masonry structures.Developing lightweight,low-carbon,recyclable,and localized masonry materials can effectively reduce carbon emissions.
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万方数据