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Utilizing Wheel Washing Machine Sludge as a Cement Substitute in Repair Mortar: An Experimental Investigation into
Changhwan Jang1, Tadesse Natoli Abebe2
1Department of Smart Construction and Environmental Engineering, Daejin University, 1007 Hoguk-ro, Pocheon-si 11159, Republic of Korea.
Materials (Basel, Switzerland)
|May 11, 2024
Summary
Wheel washer sludge (WWS) can be sustainably incorporated into repair mortar, enhancing mechanical properties and durability. This research confirms the technical feasibility and environmental benefits of reusing this construction byproduct.
Area of Science:
- Construction Materials Science
- Environmental Engineering
- Sustainable Construction
Background:
- Industrial byproducts like wheel washer sludge (WWS) pose disposal challenges.
- Sustainable construction practices seek to reuse waste materials, aligning with circular economy principles.
- Repair mortars are essential for infrastructure maintenance.
Purpose of the Study:
- To investigate the technical feasibility of incorporating wheel washer sludge (WWS) into repair mortar.
- To evaluate the impact of WWS on the mechanical properties, durability, and environmental aspects of repair mortar.
- To promote sustainable construction through the valorization of industrial byproducts.
Main Methods:
- Formulation of repair mortars with varying WWS content.
- Evaluation of workability and setting times.
- Mechanical strength, water absorption, and durability tests (chemical attack, freeze-thaw).
- Microstructure analysis and environmental hazard assessment.
Main Results:
- WWS inclusion improved workability but extended setting time.
- Mechanical strength and durability (reduced water absorption, enhanced resistance to carbonation, chloride penetration, and freeze-thaw cycles) were improved, especially with pretreated WWS.
- Microstructure analysis revealed denser matrices.
- Environmental hazard analysis confirmed the absence of harmful heavy metals in WWS.
Conclusions:
- Wheel washer sludge (WWS) can be effectively incorporated into repair mortar formulations.
- The use of WWS in repair mortars offers significant technical and environmental advantages, promoting sustainable construction.
- This study demonstrates a viable pathway for reusing industrial byproducts in the construction sector.
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