Development of anti-fungal mortar and concrete using Zeolite and Zeocarbon microcapsules
The research paper discusses the development of anti-fungal mortar and concrete that incorporates micro-encapsulated materials to resist fungal growth. The core anti-fungal agent used is D-Limonene, a natural biocide derived from oranges, while Zeolite and Zeocarbon are employed to reinforce the microcapsule membranes. The study investigates the durability and effectiveness of these microcapsules during the mixing and casting processes of mortar and concrete, utilizing scanning electron microscopy (SEM) and high-pressure liquid chromatography (HPLC) for analysis.
The research highlights the limitations of traditional anti-fungal methods, such as direct addition of fungicides, which can be transient and toxic. The proposed micro-encapsulation method allows for a controlled release of the anti-fungal agent over an extended period, estimated to last between 5 to 10 years, depending on the microcapsule thickness.
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 and an increase in drying shrinkage.
The anti-fungal effectiveness was verified through mock-up panel tests, where mortar specimens with microcapsules showed significant resistance to fungal growth compared to plain mortar. The study concludes that a 5% addition of microcapsules is optimal for balancing physical 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 approach of using micro-encapsulated biocidal agents addresses the growing concern of microbial growth in concrete structures, which can lead to structural damage and health issues. By providing a safer and more effective alternative to traditional fungicides, this research contributes to ongoing discussions about environmentally friendly construction practices. The findings offer practical benefits for engineers and architects seeking to enhance the durability and longevity of concrete structures, especially in humid environments.
