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Thermo-mechanical properties and sustainability analysis of newly developed eco-friendly structural foamed concrete by reusing palm oil fuel ash and eggshell powder as supplementary cementitious materials

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Abstract

The production of cement contributes to 10% of global carbon dioxide (CO2) pollution and 74 to 81% towards the total CO2 pollution by concrete. In addition to that, its low strength-to-weight ratio, high density and thermal conductivity are among the few limitations of heavy weight concrete. Therefore, this study was carried out to provide a solution to these limitations by developing innovative eco-friendly lightweight foamed concrete (LFC) of 1800 kg/m3 density incorporating 20–25% palm oil fuel ash (POFA) and 5–15% eggshell powder (ESP) by weight of total binder as supplementary cementitious material (SCM). The influence of combined utilization of POFA and ESP on the fresh state properties of eco-friendly LFC was determined using the J-ring test. To determine the mechanical properties, a total of 48 cubes and 24 cylinders were prepared for compressive strength, splitting tensile strength and modulus of elasticity each. A total of 24 panels were prepared to determine the thermal properties in terms of surface temperature and thermal conductivity. Furthermore, to assess the environmental impact and eco-friendliness of the developed LFC, the embodied carbon and eco-strength efficiency was calculated. It was determined that the utilization of POFA and ESP reduced the workability slightly but enhanced the mechanical properties of LFC (17.05 to 22.60 MPa compressive strength and 1.43 to 2.61 MPa tensile strength), thus satisfies the ACI213R requirements for structural lightweight concrete and that it can be used for structural applications. Additionally, the thermal conductivity reduced ranging from 0.55 to 0.63 W/mK compared to 0.82 W/mK achieved by control sample. Furthermore, the developed LFC showed a 16.96 to 33.55% reduction in embodied carbon and exhibited higher eco-strength efficiency between 47.82 and 76.97%. Overall, the combined utilization of POFA and ESP as SCMs not only enhanced the thermo-mechanical performance, makes the sustainable LFC as structural lightweight concrete, but also has reduced the environmental impacts caused by the disposal of POFA and ESP in landfills as well as reducing the total CO2 emissions during the production of eco-friendly LFC.

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Funding

The authors would like to acknowledge the FRGS RACER (Fundamental Research Grant Scheme for Research Acculturation of Early Career Researchers) RACER/1/2019/TK06/UTHM/1 and FRGS Racer K140 for the financial support for this project. In addition, the authors would also like to thank the Universiti Tun Hussein Onn Malaysia and Research Management Centre (RMC) UTHM under grant GPPS-H684 for the financial support for this project.

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Authors and Affiliations

Authors

Contributions

Ashfaque Ahmed Jhatial: conceptualization, investigation, data analysis, supervision, writing (original draft), writing (review and editing).

Wan Inn Goh: supervision, methodology, writing (original draft), writing (review and editing), funding acquisition.

Aamir Khan Mastoi: data analysis, writing (review and editing).

Amirul Faiz Rahman: data analysis, writing (review and editing).

Sufian Kamaruddin: data analysis, methodology, investigation.

Corresponding author

Correspondence to Ashfaque Ahmed Jhatial.

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The authors declare no competing interests.

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Jhatial, A.A., Goh, W.I., Mastoi, A.K. et al. Thermo-mechanical properties and sustainability analysis of newly developed eco-friendly structural foamed concrete by reusing palm oil fuel ash and eggshell powder as supplementary cementitious materials. Environ Sci Pollut Res 28, 38947–38968 (2021). https://doi.org/10.1007/s11356-021-13435-2

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  • DOI: https://doi.org/10.1007/s11356-021-13435-2

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