Development of anti-fungal mortar and concrete using Zeolite and Zeocarbon microcapsules
The research paper discusses the development of anti-fungal mortar and concrete through the incorporation of micro-encapsulated materials, specifically D-Limonene, Zeolite, and Zeocarbon. The study addresses the issue of fungal growth in concrete, which can occur as the material undergoes neutralization or carbonation, leading to various structural problems such as corrosion, unsightly stains, and health risks for inhabitants. Traditional methods of preventing fungal growth, such as direct addition of fungicides or surface coatings, have limitations, prompting the need for a more effective and long-lasting solution.
The authors propose a novel approach by embedding anti-fungal microcapsules within the mortar and concrete during the casting process. These microcapsules are designed to release the fungicidal core material gradually, with a controlled release rate that can last between 5 to 10 years. The study details the manufacturing process of these microcapsules, which involves mixing D-Limonene with Zeolite or Zeocarbon to reinforce the capsule membranes, thus preventing damage during mixing and casting.
Experimental tests were conducted to evaluate the physical properties of the mortar and concrete containing these microcapsules, including workability, compressive strength, and drying shrinkage. Results indicated that while the addition of microcapsules improved workability and air content, it also led to a decrease in compressive strength. However, the overall performance remained comparable to that of plain mortar and concrete.
The anti-fungal effectiveness was verified through mock-up panel tests, where mortar specimens with microcapsules showed no fungal growth after exposure to conditions conducive to fungal development, unlike the plain mortar specimens, which were heavily infested. The study concludes that a 5% addition of anti-fungal microcapsules is optimal for balancing performance and cost-effectiveness, although further long-term studies are recommended to refine the mixing ratios.
This research paper is significant in the field of civil engineering and materials science, particularly in the development of sustainable construction materials. The innovative use of micro-encapsulation to enhance the durability and longevity of concrete against fungal growth addresses a critical issue in building maintenance and public health. By providing a safer and more effective alternative to traditional fungicidal methods, this research contributes to ongoing discussions about environmentally friendly construction practices. The findings offer practical benefits to engineers and architects by presenting a viable solution to a common problem in concrete structures, potentially leading to longer-lasting and healthier built environments.
