首页出版说明中文期刊中文图书环宇英文官网付款页面

粉煤灰和铜尾矿在混凝土中作为水泥部分替代品的 利用潜力及生命周期评估

阿吉 特·1, 拉胡 尔·1, 2
1、印度土木工程部
2、

摘要


粉煤灰(FA)和铜尾矿(CT)都是人类活动产生的废物,由于火力发电厂的快速增长和铜需求的逐步增
加,它们遍布全球。本研究通过评估抗压强度、成本和环境影响,研究了在混凝土中联合利用FA和CT作为水泥的
部分替代品的可行性。本文先确定了FA和CT的形态和组成矿物以了解其利用潜力,随后,对不同比例的FA和CT
的混凝土进行了设计,以达到30MPa的目标强度。在10%的FA和5%的CT的联合替代下,已经观察到抗压强度的提
高(与对照组相比,最高可达8.27%)。在不影响其抗压强度的情况下,混凝土的成本也可以降低16%。改良后的混
凝土混合比例的环境影响评估也已使用生命周期评估(LCA)来进行。在LCA中,一立方米的混凝土被作为一个功
能单位。在所选择的中点类别中,作者观察到气候变化的显著减少达38%,人类毒性的减少达32.6%,臭氧消耗的减
少达33.6%,农业土地占用的减少达31.9%,水的消耗达34.3%,化石的消耗达34.8%,微粒物质的消耗达35.4%,金
属的消耗达25.2%。

关键词


铜尾矿;环境影响;粉煤灰;生命周期评估;可持续利用

全文:

PDF


参考


[1]Bhakar P, Singh AP. Groundwater quality assessment

in a Hyper-arid region of Rajasthan. India. Nat. Resour. Res.

2019; 36 (2): 505–522.

[2]Borm PJA. Toxicity and occupational health hazards

of coal fly ash (CFA). A review of data and comparison to coal

mine dust. Ann. Occup. Hyg. 1997; 41: 659– 676.

[3]Castilla JC. Copper mine tailing disposal in northern

Chile rocky shores: Enteromorpha compressa (Chlorophyta)

as a sentinel species. Environ. Monit. Assess. 1996; 40 (2):

171–184.

[4]Onuaguluchi O, Eren Ö. Reusing copper tailings

in concrete: corrosion performance and socioeconomic

implications for the Lefke-Xeros area of Cyprus. J. Clean.

Prod. 2016; 112: 420–429.

[5]Papadakis VG. Effect of fly ash on Portland cement

systems: Part I. Lowcalcium Fly Ash. Cement Concrete Res

1999; 29 (11): 1727–1736.

[6]Ram LC, Masto RE. Fly ash for soil amelioration: a

review on the influence of ash blending with inorganic and

organic amendments. Earth-Sci. Rev. 2014; 128: 52–74.

[7]Rebitzer G, Ekvall T, Frischknecht R, et al. Life cycle

assessment: Part 1: Framework, goal and scope definition,

inventory analysis, and applications. Environ Int 2004; 30 (5):

701–720.

[8]Vieira PS, Horvath A. Assessing the end-of-life

impacts of buildings. Environ. Sci. Technol. 2008; 42 (13):

4663–4669.

[9]Walia A, Mehra NK. A seasonal assessment of the

impact of coal fly ash disposal on the river Yamuna, Delhi I.

chemistry. Water Air Soil Pollut. 1998; 103 (1– 4): 277–314.

[10]Wang J, Qin Q, Hu S, et al. A concrete material with

waste coal gangue and fly ash used for farmland drainage in

high groundwater level areas. J. Clean. Prod. 2016; 112: 631–

638.




DOI: http://dx.doi.org/10.12361/2661-3824-04-03-83576

Refbacks

  • 当前没有refback。