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具有自修复性能的钢筋混凝土结构的设计使用寿命，以增加基础设施的碳减排量。

Design Service Life of RC Structures with Self-Healing Behaviour to Increase Infrastructure Carbon Savings.

作者信息

Bras Ana, van der Bergh John Milan, Mohammed Hazha, Nakouti Ismini

机构信息

Built Environment and Sustainable Technologies (BEST) Research Institute, Liverpool John Moores University, Liverpool L3 2ET, UK.

Centre for Natural Products Discovery (CNPD), School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Liverpool L3 3AF, UK.

出版信息

Materials (Basel). 2021 Jun 8;14(12):3154. doi: 10.3390/ma14123154.

DOI:10.3390/ma14123154
PMID:34201255
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8226751/
Abstract

Corrosion of reinforced concrete (RC) structures costs the UK GBP 23b annually and is one of the main durability problems contributing to the development of rust, spalling, cracking, delamination, and structural deterioration. This paper intends to demonstrate the benefit of using tailored self-healing bacteria-based concrete for RC corrosion minimisation and service life increase. The purpose was to evaluate the enhancement in the lifespan of the structure exposed to a harsh marine microenvironment by utilising a probabilistic performance-based method. Comparison is made with the performance of a commercially available solution and in terms of embodied carbon impact. Three different concretes, using CEM I 52.5N, CEM II/A-D, and CEM III/A, were tested with and without an iron-respiring bioproduct (BIO) and an added admixture corrosion inhibitor (AACI). Results show that bioproduct significantly contributes to service life increase of RC structures with CEMIII/A. The repair solution with self-healing behaviour not only increases RC service life, but also enables us to decrease the required cover thickness from 60 mm to 50 mm in an XS2 chloride environment. In both XS2 and XS3 environments, a comparison of CEMIII/A+BIO and CEMII/A-D+AACI concrete shows the benefit of using bioproduct in corrosion inhibition context, besides contributing to an embodied carbon reduction of more than 20%.

摘要

钢筋混凝土（RC）结构的腐蚀每年给英国造成230亿英镑的损失，是导致生锈、剥落、开裂、分层和结构劣化等主要耐久性问题之一。本文旨在证明使用定制的基于自愈合细菌的混凝土对于减少RC腐蚀和延长使用寿命的益处。目的是通过使用基于概率性能的方法来评估暴露在恶劣海洋微环境中的结构的寿命提升情况。将其与市售解决方案的性能以及隐含碳影响进行比较。使用CEM I 52.5N、CEM II/A-D和CEM III/A的三种不同混凝土，在添加和不添加铁呼吸生物产品（BIO）以及添加的外加剂缓蚀剂（AACI）的情况下进行了测试。结果表明，生物产品对使用CEMIII/A的RC结构的使用寿命延长有显著贡献。具有自愈合性能的修复解决方案不仅延长了RC的使用寿命，还使我们能够在XS2氯化物环境中将所需的保护层厚度从60毫米减少到50毫米。在XS2和XS3环境中，CEMIII/A+BIO和CEMII/A-D+AACI混凝土的比较表明，除了有助于减少超过20%的隐含碳外，使用生物产品在腐蚀抑制方面也有好处。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/55f9/8226751/13f19866699b/materials-14-03154-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/55f9/8226751/b2b5285390c2/materials-14-03154-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/55f9/8226751/02c84f7a6859/materials-14-03154-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/55f9/8226751/2c5c671aa6df/materials-14-03154-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/55f9/8226751/1c005bcc230c/materials-14-03154-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/55f9/8226751/7b148d258705/materials-14-03154-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/55f9/8226751/5ce35ef3e59e/materials-14-03154-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/55f9/8226751/3bba51c394fb/materials-14-03154-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/55f9/8226751/13f19866699b/materials-14-03154-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/55f9/8226751/b2b5285390c2/materials-14-03154-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/55f9/8226751/02c84f7a6859/materials-14-03154-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/55f9/8226751/2c5c671aa6df/materials-14-03154-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/55f9/8226751/1c005bcc230c/materials-14-03154-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/55f9/8226751/7b148d258705/materials-14-03154-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/55f9/8226751/5ce35ef3e59e/materials-14-03154-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/55f9/8226751/3bba51c394fb/materials-14-03154-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/55f9/8226751/13f19866699b/materials-14-03154-g008.jpg

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本文引用的文献

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Strain-specific ureolytic microbial calcium carbonate precipitation.菌株特异性尿素分解微生物碳酸钙沉淀
Appl Environ Microbiol. 2003 Aug;69(8):4901-9. doi: 10.1128/AEM.69.8.4901-4909.2003.
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Microbial iron respiration: impacts on corrosion processes.微生物铁呼吸：对腐蚀过程的影响。
Appl Microbiol Biotechnol. 2003 Aug;62(2-3):134-9. doi: 10.1007/s00253-003-1314-7. Epub 2003 May 7.
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Microbial iron respiration can protect steel from corrosion.微生物铁呼吸可以保护钢铁免受腐蚀。
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