气候变化领域集成服务门户(CCPortal): Concrete with Organic Waste Materials as Aggregate Replacement

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DOI	10.3390/app14010108
	Concrete with Organic Waste Materials as Aggregate Replacement
	Bertoldo, Nicolas; Qureshi, Tanvir; Simpkins, Dylan; Arrigoni, Alessandro; Dotelli, Giovanni
发表日期	2024
EISSN	2076-3417
起始页码	14
结束页码	1
卷号	14 期号:1
英文摘要	The disposal of high volumes of organic waste is a global issue. Using organic waste instead of sand as an aggregate material for concrete could reduce the strain on waste treatment processes and on the extraction of finite resources. At the same time, it could be a climate change mitigation strategy, by storing the biogenic carbon contained in the organic waste. This project investigated the viability of replacing 10% of fine aggregate in concrete with various organic waste materials, namely rice husk ash, wood ash, corncob granules, and wheat straw. The fresh concrete's properties were studied using the slump test, and the hardened concrete's mechanical properties were measured using the compressive strength and flexural strength tests. In this study, 14 days of curing were considered for the mechanical tests, although the 28-day mechanical strength is more generally accepted. The mechanical performances along with a life cycle assessment (LCA) comparison between the concrete with organic waste and traditional concrete were conducted. The results suggested that rice husk ash and wood ash are the most-suitable organic waste products for use as aggregate replacers considering the mechanical properties. The concrete samples incorporating wheat straw and corncob granules exhibited relatively low strength; unless advanced treatment methods are applied to enhance the concrete's performance, the utilization of these organic wastes in concrete may be limited. The environmental impact assessment of traditional concrete shows that the main contributor to almost every impact category is the production of Portland cement. Sand production contributes only marginally to the overall impact of the concrete. In terms of life-cycle greenhouse gas (GHG) emissions, traditional concrete exhibits the lowest GWP impact per cubic meter when mechanical properties are included in the functional unit used for the comparison. Nevertheless, concrete samples with wood ash and rice husk ash partially offset their lower compressive strength with higher carbon sequestration, showing a similar GWP impact to traditional concrete. This makes them promising alternatives, especially for cases where limited compressive strengths are needed. Further investigations to improve their mechanical properties and optimize their performance are warranted.
英文关键词	concrete; organic waste; sand; LCA; mechanical properties
语种	英语
WOS研究方向	Chemistry ; Engineering ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Engineering, Multidisciplinary ; Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:001139165700001
来源期刊	APPLIED SCIENCES-BASEL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/304611
作者单位	Polytechnic University of Milan; University of West England; Atomic Energy of Canada Limited; European Commission Joint Research Centre; EC JRC Institute for Energy & Transport (IET)
推荐引用方式 GB/T 7714	Bertoldo, Nicolas,Qureshi, Tanvir,Simpkins, Dylan,et al. Concrete with Organic Waste Materials as Aggregate Replacement[J],2024,14(1).
APA	Bertoldo, Nicolas,Qureshi, Tanvir,Simpkins, Dylan,Arrigoni, Alessandro,&Dotelli, Giovanni.(2024).Concrete with Organic Waste Materials as Aggregate Replacement.APPLIED SCIENCES-BASEL,14(1).
MLA	Bertoldo, Nicolas,et al."Concrete with Organic Waste Materials as Aggregate Replacement".APPLIED SCIENCES-BASEL 14.1(2024).