Utilization of Natural Zeolite in Aerated Concrete Production
The research paper investigates the use of natural zeolite, specifically clinoptilolite, as both an aggregate and a bubble-generating agent in the production of autoclaved aerated concrete (AAC). The study categorizes crushed and ground zeolite into two particle sizes: fine (100 µm) and coarse (0.5–1 mm) and examines the effects of varying replacement amounts (25%, 50%, 75%, and 100% against quartz) and curing times on the properties of AAC.
Key findings indicate that the incorporation of natural zeolite, particularly in coarser sizes, enhances the physical and mechanical properties of AAC. The optimal replacement amount was identified as 50%, yielding a compressive strength of 3.25 MPa, a unit weight of 0.553 kg/dm³, and thermal conductivity of 0.1913 W/mK. Scanning electron microscopy confirmed the formation of denser calcium silicate hydrate (C–S–H) structures at this replacement level.
The research paper also discusses the historical context of lightweight concrete, its applications, and the growing interest in using pozzolanic materials like natural zeolite due to environmental concerns. The study emphasizes the potential of zeolite to improve the performance of AAC, suggesting that it can be used effectively without aluminum powder, which is traditionally employed as a foaming agent.
This research paper is significant in the field of civil engineering and materials science, particularly in the context of sustainable construction practices. By exploring the use of natural zeolite, the study contributes to ongoing discussions about alternative materials that can enhance the properties of concrete while reducing environmental impact. The findings support the idea of utilizing locally available resources, such as Turkey's abundant natural zeolite reserves, to produce high-performance building materials. This research not only provides insights into the mechanical and thermal properties of AAC but also encourages further exploration of natural materials in construction, aligning with global trends towards sustainability and resource efficiency.
