Embodied carbon dioxide in concrete: Variation with common mix design parameters
Embodied carbon dioxide in concrete: Variation with common mix design parameters
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DOI：
10.1016/j.cemconres.2012.02.005
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发表时间：
2012-06
影响因子：
11.4
通讯作者：
P. Purnell;L. Black
中科院分区：
文献类型：
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作者：
P. Purnell;L. Black
向低碳基础设施的过渡需要了解与混凝土相关的具体化碳(Eco2)。然而，目前关于eCO2的许多工作低估了它与混凝土配合比设计之间关系的复杂性。本文论证了混凝土的二氧化碳含量不是强度的简单函数。相反，对于给定的强度，通过仔细注意基本配合比设计，可以显著节省eCO2。用PFA(粉状燃料灰)取代水泥可以实现相当大的节约；此外，使用工作性较低的混凝土、使用高效塑化剂、使用粉碎的骨料而不是圆形骨料以及使用更高强度的水泥可以产生同样显著的效果。分析是根据单位强度的碳含量进行的；这表明，所有混凝土的最佳强度(就最小化单位结构性能的eCO2而言)在50到70兆帕之间。
The transition towards a low-carbon infrastructure requires an understanding of the embodied carbon (eCO2) associated with concrete. However, much current work on eCO2underestimates the complexity of its relationship with concrete mix design. This paper demonstrates how eCO2of concrete is not a simple function of strength. Rather, for a given strength, considerable eCO2savings can be made by careful attention to basic mix design. Replacement of cement with PFA (pulverised fuel ash) can achieve considerable savings; additionally, using a concrete of lower workability, employing a superplasticiser, using crushed rather than rounded aggregate and using a higher strength of cement can have comparably significant effects. The analysis is presented in terms of embodied carbon per unit strength; this shows that there is an optimum strength for all concretes (with regard to minimising eCO2per unit of structural performance) of between 50 and 70MPa.