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首页> 外文期刊>Journal of Infrastructure Systems >Life Cycle Modeling of Concrete Bridge Design: Comparison of Engineered Cementitious Composite Link Slabs and Conventional Steel Expansion Joints
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Life Cycle Modeling of Concrete Bridge Design: Comparison of Engineered Cementitious Composite Link Slabs and Conventional Steel Expansion Joints

机译：混凝土桥梁设计的生命周期建模：水泥基复合材料连接板与常规钢伸缩缝的比较

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摘要

Concrete infrastructure represents an enormous investment of materials, energy, and capital, and results in significant environmental burdens and social costs. There is an ongoing effort to identify material alternatives to conventional concrete. Life cycle assessment (LCA) is an important tool to evaluate the environmental performance of alternative infrastructure materials and systems. Here, we present a comparative LCA of two bridge deck systems over a 60 year service life: one using conventional steel expansion joints and the other based on a link slab design using a concrete alternative, engineered cementitious composites (ECC). The ECC link slab design is expected to extend the bridge deck service life and reduce maintenance activities. A life cycle model was developed that accounts for materials production and distribution, construction and maintenance processes, construction-related traffic congestion, and end-of-life management. Results indicate that the ECC bridge deck system has significant advantages in environmental performance: 40% less life cycle energy consumption, 50% less solid waste generation, and 38% less raw material consumption. Construction related traffic congestion is the greatest contributor to most life cycle impact categories.
机译：混凝土基础设施是对材料，能源和资本的巨大投资，并导致巨大的环境负担和社会成本。目前正在努力寻找常规混凝土的替代材料。生命周期评估（LCA）是评估替代基础设施材料和系统的环境绩效的重要工具。在这里，我们提供了两种桥面系统在60年使用寿命中的比较性LCA：一种使用常规的钢伸缩缝，另一种基于混凝土板替代设计的工程水泥复合材料（ECC）。 ECC链接平板设计有望延长桥面板的使用寿命并减少维护活动。建立了一个生命周期模型，该模型考虑了物料的生产和分配，施工和维护过程，与施工有关的交通拥堵以及报废管理。结果表明，ECC桥面板系统在环境性能方面具有显着优势：生命周期能耗减少40％，固体废物产生减少50％，原材料消耗减少38％。与建筑相关的交通拥堵是影响大多数生命周期影响类别的最大因素。

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