Cradle-to-gate CO2e emissions vs. in situ CO2 sequestration of structural concrete elements
Cradle-to-gate CO2e emissions vs. in situ CO2 sequestration of structural concrete elements
复制标题
从摇篮到大门的二氧化碳当量排放与结构混凝土构件的原位二氧化碳封存
DOI：
10.1016/j.enbuild.2018.02.042
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发表时间：
2018
影响因子：
6.7
通讯作者：
Srubar, Wil V.
中科院分区：
文献类型：
--
作者：
Souto-Martinez, Adriana;Arehart, Jay H.;Srubar, Wil V.
生命周期评估（LCA）是一种新兴的方法工具，用于建筑设计和施工，以量化材料，部件和整个建筑物的环境影响。虽然计算体现摇篮到门的温室气体（GHG）排放量是普通波特兰水泥（OPC）结构混凝土元素在建筑相关的LCA的司空见惯，二氧化碳（CO2）封存的暴露的OPC混凝土原位碳化往往被忽略，因为可封存的CO2的数量被认为是微不足道的相比，与他们的制造相关的初始GHG排放量（千克CO2 e）。使用筛选摇篮到门LCA和先前开发和验证的OPC混凝土CO2封存模型，本文量化和比较估计的初始CO2 e排放量的CO2封存潜力的几个OPC混凝土元素在有限（25年）和无限的时间间隔。结果表明，根据水泥类型，抗压强度，结构几何形状，和时间，约19%-一个非平凡的总和-初始CO2 e排放量可以recoverableviaCO 2sequestration的具体内容考虑在这里。然而，值得注意的是，固碳最多的具体要素并不总是导致最低的CO2 e净排放。
Life cycle assessment (LCA) is an emerging methodological tool used in building design and construction to quantify the environmental impacts of materials, components, and whole buildings. While calculation of embodied cradle-to-gate greenhouse gas (GHG) emissions is commonplace for ordinary portland cement (OPC) structural concrete elements in building-related LCAs, the carbon dioxide (CO2) sequestered byin situcarbonation of exposed OPC concrete is often neglected because the quantity of sequesterable CO2is assumed trivial compared to the initial GHG emissions (kg CO2e) associated with their manufacture. Using a screening cradle-to-gate LCA and a previously developed and validated CO2sequestration model for OPC concrete, this paper quantifies and compares estimates of the initial CO2e emissions to the CO2sequestration potential of several OPC concrete elements at both finite (25 years) and infinite time intervals. The results demonstrate that, depending on cement type, compressive strength, structural geometry, and time, approximately 19%—a non-trivial sum—of initial CO2e emissions could be recoverableviaCO2sequestration for the concrete elements considered herein. Notably, however, concrete elements that sequester the most CO2do not always result in the lowest net CO2e emissions.
预测普通硅酸盐水泥（OPC）混凝土碳汇潜力的数学模型
影响因子：
7.4
作者：
Souto-Martinez, Adriana;Delesky, Elizabeth A.;Foster, Kyle E.O.;Srubar, Wil V.
通讯作者：
Srubar, Wil V.
影响因子：
11.4
作者：
Pade, Claus;Guimaraes, Maria
通讯作者：
Guimaraes, Maria