The CO2 uptake of concrete in a 100 year perspective
The CO2 uptake of concrete in a 100 year perspective
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DOI：
10.1016/j.cemconres.2007.06.009
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发表时间：
2007-09-01
影响因子：
11.4
通讯作者：
Guimaraes, Maria
中科院分区：
文献类型：
--
作者：
Pade, Claus;Guimaraes, Maria
水泥生产过程中排放的二氧化碳中有50%以上来自石灰石的煅烧。在水泥基产品（如混凝土和砂浆）的生命周期中，这些二氧化碳在一个称为碳酸化的过程中被重新吸收。混凝土碳酸化在水泥生产二氧化碳排放评估中的影响尚未得到充分记录。具体而言，缺乏关于被拆除和压碎的混凝土的碳化的知识。现有的计算碳化的模型没有考虑混凝土被破坏后发生的情况。因此，水泥和混凝土行业的净CO2 emissions的贡献可能会显着高估。本文包括理论工作，实验室研究，调查和计算的基础上，在北欧国家的丹麦，冰岛，挪威和瑞典的混凝土生产。2003年生产的混凝土通过碳酸化吸收的CO2估计值似乎在100年的时间内相当于用于生产混凝土中使用的波特兰水泥的生料煅烧所排放的CO2的很大比例。(C)2007爱思唯尔有限公司保留所有权利。
More than 50% of the CO2 emitted during cement production originates from the calcination of limestone. This CO2 is reabsorbed during the life cycle of cement based product such as concrete and mortars in a process called carbonation.The impact that concrete carbonation has in the assessment of CO2 emissions from cement production has not been fully documented. Specifically, there is a lack of knowledge about the carbonation of demolished and crushed concrete. The existing models for calculating carbonation do not take into account what takes place after the concrete has been demolished. Consequently, the contribution of the cement and concrete industry to net CO2 emissions may be significantly overestimated.This paper encompasses theoretical work, laboratory studies, surveys and calculations based on the concrete production in the Nordic countries of Denmark, Iceland, Norway and Sweden. The estimated CO2-uptake through carbonation of the concrete produced in the year 2003 seems during a 100 year period to amount to a significant proportion of the CO2 emitted by calcination of the raw mix used to produce the Portland cement used in the concrete. (C) 2007 Elsevier Ltd. All rights reserved.