| 再生混凝土和普通混凝土碳排放对比分析 |
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| 引用本文：刘倩,赵曼丽,张深,樊腾飞,李如燕.再生混凝土和普通混凝土碳排放对比分析[J].上海第二工业大学(中文版),2026,43(2):138-145 |
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| 基金项目:上海问迪科技有限公司项目(C80ZH220004), 浦东新区科技发展基金项目(PKJ2024-C02) 资助 |
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| 中文摘要:为探讨采用再生混凝土替代普通混凝土实现降碳的可行性, 本文以上海某混凝土搅拌站生产的C20、C25和C30 再生混凝土与普通混凝土为研究对象, 开展碳排放测算。结果显示, 上述3 种强度等级再生混凝土的原材料引入碳排放占总碳排放量的平均值为64.70%, 普通混凝土该指标均值为71.47%。可见原材料引入碳排放是再生混凝土和普通混凝土最重要的碳排放阶段。以C20 混凝土为例, 再生混凝土和普通混凝土中由水泥生产引入的碳排放分别占原材料引入碳排放的81.49%和84.27%, 是两类混凝土最主要的碳排放源。再生混凝土和普通混凝土中天然砂运输产生的碳排放分别占原材料引入碳排放量的5.00% 和4.13%, 是原材料运输碳排放的最重要来源。与同强度等级的普通混凝土相比, C20、C25 和C30 再生混凝土的总碳排放量分别降低了14.51%、20.35% 和22.92%, 这归因于再生骨料的使用和水泥用量的减少。 |
| 中文关键词:再生混凝土 普通混凝土 碳排放计算 计算边界 对比分析 |
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| Comparative Analysis of Carbon Emissions between Recycled Concrete and Conventional Concrete |
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| Abstract:In order to explore the feasibility of using recycled concrete as a substitute for conventional concrete to reduce carbon emissions, this study calculates the carbon emissions of C20, C25, and C30 recycled concrete and conventional concrete produced by a concrete mixing plant in Shanghai. The results show that the average proportion of carbon emissions contributed by raw materials to the total carbon emissions of recycled concrete with the three strength grades is 64.70%. The average proportion of this ordinary for conventional concrete is 71.47%. Therefore, the carbon emissions associated with raw materials stand out as the most significant phase in terms of overall carbon emissions. Taking C20 concrete as an example, the carbon emissions generated from cement production in recycled concrete and conventional concrete account for 81.49% and 84.27% of the total carbon emissions from raw materials, respectively. Evidently, cement production stands out as primary source of carbon emissions for both types of concrete. The carbon emissions generated during the transportation of natural sand in recycled concrete and conventional concrete, account for 5.00% and 4.13% of the carbon emissions introduced by raw materials, respectively. This indicates that the transportation of natural sand is the most significant contributor to carbon emissions in the raw material transportation process. Compared with conventional concrete of the same strength grade, the total carbon emissions of C20, C25, and C30 recycled concrete decreased by 14.51%, 20.35%, and 22.92%
respectively. This is attributed to the use of recycled aggregates and the reduction in cement consumption. |
| keywords:recycled concrete conventional concrete carbon emission calculation computational boundary comparative analysis |
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