An analysis of the potential for improving cement efficiency through functionally graded concrete elements with durability-driven concrete specification
An analysis of the potential for improving cement efficiency through functionally graded concrete elements with durability-driven concrete specification
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DOI：
10.2749/prague.2022.1820
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Jessica C. Forsdyke;J. Lees
中科院分区：
文献类型：
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作者：
Jessica C. Forsdyke;J. Lees
水泥是混凝土的主要粘合成分，占全球二氧化碳排放量的5-6%。在功能梯度混凝土构件中，通过改变体积上的混凝土混合物成分来优化性能，仅在需要抵抗荷载或侵蚀性物质的情况下才允许分配水泥强化混合物。在实践中，这是通过在同一模板内分层不同的混凝土混合物来实现的，与传统方法相比，提供了减少总水泥含量的机会，其中单一混凝土混合物用于整个元件。这项工作讨论了可能的应用功能梯度元件，优化耐久性阻力。通过比较传统的均质混凝土单元与功能梯度分层单元，计算了各种情况下潜在的水泥节省量。结果表明，在保持同等性能的同时，减少结构整体水泥需求的潜力是显着的。
Cement, the primary binding component of concrete, is responsible for 5-6% of global CO2 emissions. In functionally graded concrete elements, properties are optimised by varying the concrete mix composition over the volume, allowing for allocation of cement intensive mixes only where necessary for resistance of load or aggressive substances. In practice, this is achieved by layering of different concrete mixes within the same formwork, providing an opportunity for reduction in overall cement content compared to conventional methods where a single concrete mix is used for entire elements. This work discusses possible applications for functionally graded elements that are optimised for durability resistance. Potential cement savings for various scenarios are calculated by comparison of traditional homogeneous concrete elements with functionally graded layered ones. The results show that the potential for reducing overall cement demand of structures whilst maintaining equivalent performance is significant.