| Abstract |
This study explores the use of coal char (CC) as a byproduct from pyrolysis in varying percentages as a cement reducer and an additive in concrete. The research examines the physical, microstructural, and mechanical properties of concrete mixes. The heat of cement hydration curve indicated that CC accelerates the cement hydration process. Increasing CC has minor changes in concrete workability and does not substantially affect concrete density. Compressive strength improved by about 28% with 0.5% CC in both scenarios over the control mix. Flexural and splitting tensile strengths showed improvement, particularly at lower percentages of CC. The modulus of elasticity exhibited constant performance around 0.25% to 0.75% CC. The key finding is that an optimal CC content of 0.5% led to the highest strength gains in both scenarios. The overall results indicate that incorporating CC at <1% by weight of cement enhances the mechanical and microstructural properties of concrete. |
| Authors |
Iftekhar Alam Dipta  , Kam Ng  , Chooi Kim Lau , Hua Yu
|
| Journal Info |
Taylor & Francis | Journal of Sustainable Cement-Based Materials , pages: 1 - 19
|
| Publication Date |
2/17/2025 |
| ISSN |
2165-0373 |
Type |
article |
| Open Access |
closed
|
| DOI |
https://doi.org/10.1080/21650373.2025.2465979 |
| Keywords |
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