Abstract
This study investigated the potential use of rejected coal as a fine aggregate filler in paving block production. Comprehensive characterization of the rejected coal was conducted, including toxicity, physical, chemical, and mineralogical analyses of the coal. The results showed that the rejected coal met environmental safety standards (TCLP) and had suitable properties as an aggregate. Paving blocks were produced by incorporating different proportions of rejected coal fillers and were tested for compressive strength, water absorption, and density. The optimal mix with 35% rejected coal filler as a replacement of stone ash achieved a compressive strength of 14.61 MPa, water absorption of 6.88%, and density of 1.98 g/cm3, meeting Class C requirements for paving blocks. Furthermore, the low water absorption value contributed to the improved structural strength of the paving blocks. The density and durability of the paving blocks were influenced by the microstructure of the material, specifically its shape, size, and porosity. This study provides valuable insights into the characteristics and classification of filler materials, particularly highlighting the significant impact of coal waste fillers on cement composites within paving blocks.
Recommended Citation
Nikmatin, Siti; Kurniawan, Allen; Putra, Heriansyah; Adiati, Rima Fitria; Ma’ruf, Riawan; and Irwanto, Dwi Arso Yedi
(2025)
"Sustainable Paving Block Development: Utilizing Rejected Coal as Filler and Assessing its Impact on Paving Block’s Properties,"
Journal of Sustainable Construction Materials and Technologies: Vol. 10:
Iss.
3, Article 5.
https://doi.org/10.29187/2458-973X.1196
Available at:
https://commons.yildiz.edu.tr/jscmt/vol10/iss3/5
Included in
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