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Eco-efficient design indices for reinforced concrete members

机译：钢筋混凝土构件的生态效率设计指标

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摘要

The production of cement, the primary binder in concrete, is resulting in notable environmental impacts worldwide. It has been argued that efficient use of cement in concrete and the efficient design of concrete components can be a means for reducing the impacts from these materials by lowering overall demand. In systems where concrete is the only material used, efficient design can often be related to requisite material properties; however, the concept of efficient use becomes more complex in multi-material systems, such as steel reinforced concrete. In this work, steps towards developing engineered methods for efficient design of reinforced concrete members are taken by developing equations to relate environmental impacts to the volume of concrete and volume of steel required. This work focuses on mitigation of greenhouse gas (GHG) emissions, but the equations developed can be extended to other environmental impacts as well. The results indicate that different member designs require different concrete mixtures and reinforcement cross-sectional areas to reduce GHG emissions; driving down cement content may not be the sole parameter for reducing GHG emissions from concrete.
机译：水泥（混凝土中的主要粘合剂）的生产正在全球范围内引起显着的环境影响。有人认为，在混凝土中有效使用水泥和有效设计混凝土构件可以是通过降低总体需求来减少这些材料的影响的一种手段。在仅使用混凝土作为材料的系统中，有效的设计通常与所需的材料特性有关；但是，有效使用的概念在多材料系统（例如钢筋混凝土）中变得更加复杂。在这项工作中，通过开发方程式将环境影响与混凝土量和所需钢量相关联，从而采取步骤开发可有效设计钢筋混凝土构件的工程方法。这项工作的重点是减少温室气体（GHG）排放，但是开发的公式也可以扩展到其他环境影响。结果表明，不同的构件设计需要使用不同的混凝土混合物和增强的横截面积，以减少温室气体排放。降低水泥含量可能不是减少混凝土温室气体排放的唯一参数。

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