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标题：Environmental and economic viability of Alkali Activated Material (AAM) comprising slag, fly ash and spent coffee ground
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作者：Teck-Ang Kua ; Monzur Alam Imteaz ; Arul Arulrajah 等
期刊名称：International Journal of Sustainable Engineering
印刷版ISSN：1939-7038
出版年度：2019
卷号：12
期号：4
页码：223-232
DOI：10.1080/19397038.2018.1492043
语种：English
出版社：Taylor & Francis Group
摘要：ABSTRACTThis paper presents a concept of reusing spent coffee ground (CG) as a construction material. Through creating a CG-filled Alkali Activated Material (AAM) with industrial wastes such as fly ash (FA) and slag (S), a strong recycled material was synthesised and found suitable to be used as a road subgrade fill material. Potential groundwater contamination tests were done in accordance to the Australian Standard Leaching Procedure (ASLP). The environmental analysis done on this green material shows that albeit being composed of various industrial wastes and chemicals, CG-filled AAMs in the ground will not cause adverse environmental impacts to surrounding soils and groundwater. Heavy metals and cyanide leached from the AAMs were well below hazardous thresholds. Comparing the carbon footprint of CG, it is found that recycling CG into a construction material would reduce the nett global carbon emission by reducing dependency on quarried material. Cost analyses done on CG-filled AAMs show that these AAMs are expensive to produce relative to traditional construction materials. However, as recycling technology is progressively advancing, in the future the economic value of CG-filled AAM may increase to match those of contemporary construction materials.
关键词：KEYWORDSAlkali Activated Material (AAM)coffee grounds (CG)subgradeenvironmental assessment