Evaluation of combined utilization of marble dust powder and fly ash on the properties and sustainability of high‑strength concrete
With the recent increase in demand for high-strength concrete, higher cement content is utilized, which has increased the need for cement. The cement industry is one of the most energy-consuming sectors globally, contributing to 10% of global carbon dioxide (CO2) gas emissions and global warming...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Springer Link
2022
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/7091/ http://eprints.uthm.edu.my/7091/1/J13930_a1d2d02f725ab761743fb3820719900c.pdf |
| Summary: | With the recent increase in demand for high-strength concrete, higher cement content is utilized, which has increased the
need for cement. The cement industry is one of the most energy-consuming sectors globally, contributing to 10% of global
carbon dioxide (CO2) gas emissions and global warming. Similarly, with rapid urbanization and industrialization, a vast
number of by-products and waste materials are being generated in abundance, which causes environmental and health issues.
Focusing on these two issues, this study aimed to develop an M50-grade eco-friendly high-strength concrete incorporating
waste materials like marble dust powder (MDP) and fy ash (FA) as partial cement replacement. 2.5%, 5%, 7.5%, and 10%
MDP and FA by weight of total binder was utilized combinedly, such that the 5%, 10%, 15%, and 20% cement content was
replaced, respectively. The fresh state properties in terms of workability and hardened state properties in terms of compres�sive and fexural strengths were evaluated at 7, 14, 28, 56, and 90 days. Furthermore, to assess the environmental impact of
MDP and FA, the embodied carbon and eco-strength efciency were calculated. Based upon the results, it was observed that
a combined 10% (5% MDP and 5% FA) achieved the highest strength; however, 15% (7.5% MDP and 7.5% FA) substitution
could be optimal. Furthermore, the combined utilization of FA and MDP also enabled a reduction in the total embodied
carbon. It decreased the cost of concrete, resulting in an eco-friendly, high-strength concrete. |
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