Reuse Water Treatment Sludge for Hollow Concrete Block Manufacture
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Copyright: © 2020 Thaniya Kaosol. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Problem statement: This research reuses the water treatment sludge from a water treatment plant to make hollow concrete blocks. The main objectives are to increase the value of the water treatment sludge from a water treatment plant and to make a sustainable and profitable disposal alternative for the water treatment sludge. Attempts were made to utilize the water treatment sludge as a fine aggregate in the concrete mix for hollow concrete blocks. Approach: This study presented the results of these studies on potential applications of the water treatment sludge for beneficial uses. A concrete block is used as a building material in the construction of walls. The concrete block construction is gaining importance in developing countries. Results: The results in this study showed that the water treatment sludge mixtures can be used to produce hollow non-load bearing concrete blocks, while 10 and 20% water treatment sludge mixtures can be used to produce the hollow load bearing concrete blocks. Economically, the 10 and 20% water treatment sludge mixtures can reduce the cost at 0.64 and 1.05 Thai baht per block, respectively. The 50% of water treatment sludge ratio in mixture to make a hollow non-load bearing concrete block can reduce the maximum cost at 2.35 baht per block. Conclusion: Finally, the production of the hollow concrete blocks mixed with water treatment sludge use as a fine aggregate in hollow concrete blocks, could be a profitable disposal alternative in the future and would be of the highest value possible for the foreseeable future.
- Water treatment sludge
- hollow concrete block
- compressive strength