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Journal of Zhejiang University SCIENCE A
ISSN 1673-565X(Print), 1862-1775(Online), Monthly
2024 Vol.25 No.8 P.670-679
Monotonic mechanical behaviour of compacted completely decomposed granite with various inclusion levels of incineration bottom ash
Abstract: Completely decomposed granite (CDG) is widely distributed in South China (Xu et al., 2022; Wang et al., 2023). The parent granite rock mass gradually loses features during the weathering process, and thus needs to be reinforced when used (Lan et al., 2003; Dassekpo et al., 2017; Alamanis et al., 2021). On the other hand, considering the huge demand for construction materials and limited natural resources, it is increasingly important to fully utilize solid waste (Gruhler et al., 2019; Anagnostopoulos et al., 2020; Jiang et al., 2022, 2023a, 2023b). With high strength and environment-friendly characteristics, incineration bottom ash (IBA) seems to be a suitable reinforcement material for CDG (Ahmed and Khalid, 2011; Alhassan and Tankó, 2012; Toraldo et al., 2013; Lynn et al., 2017; Xuan et al., 2018; Tang et al., 2020). Both reinforcement and environmental issues should be addressed when considering treatment of CDG with IBA.
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机构:1湖南大学,地下空间开发先进技术研究中心,中国长沙,410082;2湖南大学,建筑安全与节能教育部重点实验室,中国长沙,410082;3湖南大学,土木工程学院,中国长沙,410082;4郑州大学,土木工程学院,中国郑州,450001;5香港理工大学,土木与环境工程系,中国香港;6撒马尔罕州立大学,应用与理论力学系,乌兹别克斯坦
概要:近年来,不断增加的生活垃圾产生了大量的焚烧残渣(IBA)。同时,考虑到土建材料的巨大用量需求和有限的自然资源,充分利用固废材料变得越来越重要。本研究通过静三轴试验,研究了在不同的IBA体积含量和不同的压实全分化花岗岩(CDG)压实度下,IBA对CDG试样静力学特性的影响。结果表明,随着IBA体积含量的增加,最大偏应力或抗剪强度逐渐增大,呈双线性增加趋势。当IBA的体积含量超过某一特征值时,增长速率更加显著。在到达此值之前,CDG-CDG接触主导力学特性,而在达到此值之后,CDG-IBA和IBA-IBA接触成为主导。随着压实度的增加,IBA配位数和IBA接触比例增加,IBA的特征体积含量值降低。因此,在实际工程中,无论是提高CDG的压实度还是提高IBA的体积含量,都有助于提高加固土体的目标强度。
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DOI:
10.1631/jzus.A2300514
CLC number:
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On-line Access:
2024-08-27
Received:
2023-10-17
Revision Accepted:
2024-05-08
Crosschecked:
2024-08-20