气候变化领域集成服务门户(CCPortal): Bio-stabilising earthen houses with tannins from locally available resources

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DOI	10.1016/j.cscm.2024.e03182
	Bio-stabilising earthen houses with tannins from locally available resources
	Bras, Ana; Yakubu, Ibrahim; Mohammed, Hazha; Idowu, Ibijoke; Jones, Rosalind; Gagnon, Alexandre S.; Owusu-Nimo, Fred; Huang, Yuner; Beckett, Christopher T. S.; Addo, Irene Appeaning
发表日期	2024
ISSN	2214-5095
起始页码	20
卷号	20
英文摘要	This study presents the first-ever comparative evaluation of traditional biostabilisation practices for housing employed in Northern Ghana. Such a comparative evaluation is crucial in understanding and addressing the increased risk of flooding in the region due to a combination of climate change and land use changes. Given the environmental conditions and material availability that shape construction techniques in this area, it is imperative to assess the effectiveness of these practices in mitigating flood risks. The investigation focuses on readily available resources from the Wa and Tamale regions, specifically dawadawa (D), beini (B), and rice husk (R). These biostabilisers were subjected to rigorous testing to assess their efficacy. Earth mortar samples were created using sieved plain local soil (P) with or without the addition of rice husk, which is a local practice, and dawadawa and beini solutions were tested as a water replacement (+ wD or + wB, added during material manufacture) or as a surface cover (+ coverD or + coverB). The effects are examined in terms of microstructure modifications detected through tannins type and presence, SEM/EDS, water absorption via capillary uptake, and compressive and flexural strength for two different types of application: embedded in the mixture or covering the surface. Overall, solutions containing dawadawa were superior to those containing beini for the tested soil. Both coverD and + coverB decreased the water absorption capacity of the earth mortars and provided almost complete protection for 15 min. After three days, all mortars mixed with the dawadawa or beini solutions (P + wD, PR + wD and PR + wB) displayed lower absorption than the P material. Condensed tannins were identified in dawadawa, but only small precipitation in beini and no precipitation in the rice husk. This indicates that dawadawa has a greater degree of polymerisation (compared to rice and beini), developing a polymerisation tannin-iron complex in contact with oxygen from the air, which explains the macrostructure results. SEM/EDS results indicated polymeric condensed tannins and hydrolysable tannins and that complex accumulation and subsequent oxidation are the main reasons for improving water resistance. The laboratory tests, therefore, support the traditional methods of using dawadawa,
英文关键词	Sustainable construction material; Earthen construction; Earth mortar; Biostabilisers; African locust bean; Dawadawa; Beini; Tannins; Durability
语种	英语
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
WOS类目	Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS记录号	WOS:001238994400001
来源期刊	CASE STUDIES IN CONSTRUCTION MATERIALS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305434
作者单位	Liverpool John Moores University; University for Development Studies; Bangor University; Liverpool John Moores University; University of Edinburgh; University of Ghana
推荐引用方式 GB/T 7714	Bras, Ana,Yakubu, Ibrahim,Mohammed, Hazha,et al. Bio-stabilising earthen houses with tannins from locally available resources[J],2024,20.
APA	Bras, Ana.,Yakubu, Ibrahim.,Mohammed, Hazha.,Idowu, Ibijoke.,Jones, Rosalind.,...&Addo, Irene Appeaning.(2024).Bio-stabilising earthen houses with tannins from locally available resources.CASE STUDIES IN CONSTRUCTION MATERIALS,20.
MLA	Bras, Ana,et al."Bio-stabilising earthen houses with tannins from locally available resources".CASE STUDIES IN CONSTRUCTION MATERIALS 20(2024).