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Sustainable ternary cement blends with high-volume ground granulated blast furnace slag–fly ash

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Abstract

Coal fly ash and granulated ground blast furnace slag (GGBS) are more widely used as supplementary cementitious materials in cement production. This study investigates the influence of high-volume ordinary Portland cement (OPC) replacement with fly ash and/or GGBS on the flow, compressive strength and environmental impacts of the resulting binary and ternary blends. Experimental results showed that the use of ternary blends enhanced the flow characteristics, specifically with the incorporation of 20% to 30% fly ash. Overall, partially replacing OPC in the ternary and binary blends reduced the early-age compressive strength, while an improvement to the later-age strength was observed. Nevertheless, beyond 28 days, the inclusion of 20% and 30% of fly ash in the ternary blends exhibited the highest compressive strength. The results from life cycle assessment (LCA) revealed that the OPC is the key contributor to the environmental impact where 50% and 70% OPC replacement reduced on average 44% and 61% of the total impacts, respectively, regardless of the blending system. As such, effectively the eco-mechanical performance of blends was improved. The 70% ternary blends gave superior eco-mechanical performance (lowest GWP/strength ratio) in the presence of 10% and 20% of fly ash. This study also showed that the artificial neural network model can be developed and adequately used to predict the properties of the OPC blends (i.e. eco-mechanical performance).

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Abbreviations

ANN:

Artificial neural network

CaO:

Calcium oxide

CH:

Calcium hydroxide (Ca(OH)2)

CO2 :

Carbon dioxide

FPMF:

Fine particulate matter formation

GGBS:

Ground granulated blast furnace slag

GHG:

Greenhouse gas

GWP:

Global warming potential

LCA:

Life cycle assessment

LCIA:

Life cycle impact assessment

OPC:

Ordinary Portland cement

SCM:

Supplementary cementitious material

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Funding

This work was supported by Universiti Malaya under the grant IIRG002C-2020IISS.

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Authors

Contributions

Mohammed K. H. Radwan was involved in data curation, formal analysis, investigation, methodology and writing—original draft. Chiu Chuen Onn was involved in formal analysis, funding acquisition, project administration, software, supervision and writing—review and editing. Kim Hung Mo was involved in conceptualization, resources, supervision and writing—review and editing. Soon Poh Yap was involved in resources, supervision and writing—review and editing. Ren Jie Chin was involved in software, validation and writing—review and editing. Sai Hin Lai was involved in software and validation.

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Correspondence to Kim Hung Mo.

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The authors have no relevant financial or non-financial interests to disclose.

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Radwan, M.K.H., Onn, C.C., Mo, K.H. et al. Sustainable ternary cement blends with high-volume ground granulated blast furnace slag–fly ash. Environ Dev Sustain 24, 4751–4785 (2022). https://doi.org/10.1007/s10668-021-01633-4

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  • DOI: https://doi.org/10.1007/s10668-021-01633-4

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