Optimizing concrete for circularity: a comparative life cycle assessment of geopolymer and ordinary concrete

被引：8

作者：

Bamshad, Omid ^{[1
]}

Ramezanianpour, Amir Mohammad ^{[1
]}

机构：

[1] Faculty of Civil Engineering, College of Engineering, University of Tehran, Tehran

来源：

Environmental Science and Pollution Research | 2024年 / 31卷 / 43期

关键词：

Circular economy; Geopolymer concrete; Life cycle assessment; Service life; Waste management;

D O I：

10.1007/s11356-024-34863-w

中图分类号：

学科分类号：

摘要：

Geopolymer concrete is a sustainable construction material developed with industrial by-products to eliminate the use of cement in concrete production. However, a cradle-to-cradle life cycle assessment (LCA) that accounts for the impact of service life is essential to comprehensively assess the environmental advantages of GPC. In this study, a comparative cradle-to-cradle LCA was performed for circular geopolymer concrete (CGPC), geopolymer concrete (GPC), and circular ordinary concrete (COC), as alternatives to Portland cement concrete (PCC). Also, the biases of common LCA resulted from ignoring service life and end-of-life scenarios were identified. Finally, the sustainability potentials of the alternative scenarios were evaluated. According to the cradle-to-cradle LCA using the adopted functional unit, GPC and CGPC significantly alleviated the environmental impact of cement production, such as global warming potential by about 53%. Ignoring the service life and end-of-life scenarios considerably changed the critical midpoint (ionizing radiation for CGPC and GPC) and endpoint indicators (resources for CGPC and GPC) and priority of alternative concretes. Finally, the CGPC and GPC showed a substantial increase of 213% and 276% in sustainability potential compared to PCC, respectively. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

引用

页码：55788 / 55811

页数：23

共 82 条

[1]

Amari S., Darestani M., Millar G.J., Samali B., Strounina E., Engineering and life cycle assessment (LCA) of sustainable zeolite-based geopolymer incorporating blast furnace slag, Sustainability, 16, 1, (2024)

[2]

Asadollahfardi G., Katebi A., Taherian P., Panahandeh A., Environmental life cycle assessment of concrete with different mixed designs, Int J Constr Manag, 21, 7, pp. 665-676, (2021)

[3]

Standard test method for density, relative density (Specific gravity), and absorption of coarse aggregate, American Society for Testing and Materials, pp. 1-6, (2001)

[4]

Standard test method for density, relative density (Specific gravity), and absorption of fine aggregate, American Society for Testing and Materials, pp. 1-6, (2003)

[5]

Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates, pp. 1-5, (2001)

[6]

Standard Specification for Portland Cement, pp. 1-8, (2008)

[7]

Standard Test Method for Slump of Hydraulic-Cement Concrete, pp. 1-4, (2003)

[8]

Bai G., Zhu C., Liu C., Liu B., An evaluation of the recycled aggregate characteristics and the recycled aggregate concrete mechanical properties, Constr Build Mater, 240, (2020)

[9]

Bajpai R., Choudhary K., Srivastava A., Sangwan K.S., Singh M., Environmental impact assessment of fly ash and silica fume based geopolymer concrete, J Clean Prod, 254, (2020)

[10]

Bamshad O., Mahdikhani M., Ramezanianpour A.M., Maleki Z., Majlesi A., Habibi A., Delavar M.A., Prediction and multi-objective optimization of workability and compressive strength of recycled self-consolidating mortar using Taguchi design method, Heliyon, 9, 6, (2023)

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