Crack self-healing in bio-green concrete

doi:10.1016/j.compositesb.2021.109397

	Crack self-healing in bio-green concrete
	V. Zhang, Lei 4; Nehdi, Moncef L.4; Suleiman, Ahmed R.4; Allaf, Malihe Mehdizadeh 4; Gan, Manguang 2,3; Marani, Afshin 4; Tuyan, Murat 1; Bacteria, Crack Concrete
刊名	COMPOSITES PART B-ENGINEERING
	2021-12-15
卷号	227 页码:17
关键词	Crack Self-healing Alkali-activated Concrete S pasteurii Bacteria
ISSN号	1359-8368
DOI	10.1016/j.compositesb.2021.109397
英文摘要	Eco-efficient concrete produced by alkali-activation of recycled by-products has increased susceptibility to cracking. This study investigates the potential of S. pasteurii bacteria to impart crack self-healing in such green concrete. Porous expanded glass granules made from recycled glass were used, for the first time, as bacterial and nutrient carriers. Scanning electron microscopy, Raman spectroscopy, capillary water absorption, and inductively coupled plasma optical emission spectroscopy were deployed to investigate self-healing efficiency in the bio-green concrete under various environmental exposure. Crack widths up to 111 mu m for moist-dry cured specimens incorporating bacteria were completely healed within 90 days, while no self-healing was observed in the control specimens. The sorptivity coefficient in specimens incorporating S. pasteurii bacteria was also much lower. SEM-EDS combined with Raman spectroscopy indicated that the dominant self-healing product was calcite. This study elucidates crack remediation in AAMs and demonstrates the potential of this novel biogenic self-healing system in green concrete structures.
WOS研究方向	Engineering ; Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000711568700001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/28372]
专题	中科院武汉岩土力学所
通讯作者	V. Zhang, Lei
作者单位	1.Univ Ottawa, Dept Civil Engn, Ottawa, ON K1N 6N5, Canada 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomechan & Geotechn Engn, Wuhan 430071, Hubei, Peoples R China 4.Western Univ, Dept Civil & Environm Engn, London, ON, Canada
推荐引用方式 GB/T 7714	V. Zhang, Lei,Nehdi, Moncef L.,Suleiman, Ahmed R.,et al. Crack self-healing in bio-green concrete[J]. COMPOSITES PART B-ENGINEERING,2021,227:17.
APA	V. Zhang, Lei.,Nehdi, Moncef L..,Suleiman, Ahmed R..,Allaf, Malihe Mehdizadeh.,Gan, Manguang.,...&Bacteria, Crack Concrete.(2021).Crack self-healing in bio-green concrete.COMPOSITES PART B-ENGINEERING,227,17.
MLA	V. Zhang, Lei,et al."Crack self-healing in bio-green concrete".COMPOSITES PART B-ENGINEERING 227(2021):17.