Partial Replacement of Aggregate by Utilization of Waste Stone Dust and Coconut Shell

The large amount of red sand stone dust waste during its production for industrial purposes as an available construction resource has not only diminished but also created a threat to our environment. Indeed, the dumped waste negatively affects the aquifers. Therefore, a better way of its recycling may be its use in the manufacture of concrete products during construction as a substitute for sand in a fixed and safe proportion. The current work is an explanation of experimenting with concrete mix of grades M15 and M20 by replacing approximately 30% sand. A constant water/cement ratio was followed during the experiment and by comparing the compressive strength results. With the help of this project report, we can find an appropriate operation for a particular sample of red sandstone dust. This reduces the need for a large area for disposal of redstone dust which in turn causes significant environmental damage. The usefulness of red sandstone powder in a particular work of mixing grades M15 and M20 of concrete as a replacement for cement and sand has been proven within the framework of the significant results obtained. Workability of concrete is the ease with which concrete can be handled, placed and transferred. The workability of concrete depends on many factors, but water plays a major role. The amount of water added a little more or a little less can affect the workability of the concrete. Industrial waste such as red stone powder can replace sand in the event that the availability of sand is less and far from the site. Therefore, redstone powder can be used by replacing a fixed percentage of sand, not only to maintain project economy, but also to manage industrial waste. Keywords: conventional concrete, lightweight concrete, coconut shell, coconut fibre, red stone dust.