Time-dependent mechanical and durability performance of concrete incorporating industrial stone waste as aggregate replacements
摘要
Civil construction underutilizes non-pozzolanic industrial fine powder waste such as stone dust powder (SDP), marble powder (MP), and granite powder (GP) in concrete manufacturing. These materials, which are often disposed of in landfills, represent substantial environmental dangers. Despite their abundance, their use in concrete remains restricted. A major factor for this underutilization is a lack of understanding of their potential advantages and effective application strategies. This study looks at the usage of these fine powders as a fourth component in concrete using two approaches: cumulative replacement of both fine and coarse aggregates and sand replacement. With 400 kg/m3 of cement, 0.37 w/c ratio, and up to 300 kg/m3 of fine powder, a total of 38 sets of mix designs were prepared. The mechanical, durability, and fresh properties of concrete made with these waste materials were assessed. Concrete incorporating fine powders retained compressive strength while significantly improving durability. Water penetration depth decreased by 13.4–22% at 100 kg/m3 and 54.5–63.1% at 300 kg/m3 for mixes with M-sand, and by 12.1–24.4% and 52.3–60.2% respectively for river sand mixes, using SDP, MP, and GP powders in both CR and SR types indicating enhanced resistance to water permeability. Despite a slight increase in admixture demand, it remained marginal compared to the control. Cost analysis showed up to a 2.5% reduction in concrete cost alongside conservation of natural resources. The use of fine powders thus offers a sustainable approach, enhancing performance while promoting eco-friendly construction through the utilization of non-pozzolanic industrial waste.