Development of eco-materials for noise barriers
Abstract
Noise barriers are the most effective and widespread solution for reducing traffic noise. However, their manufacture relies heavily on the use of cement, which has a significant environmental impact. In this context, the development of an innovative material that combines earth stabilization and foaming with the incorporation of hemp particles presents a promising alternative. In this study, earth stabilization is achieved using LC3 (Limestone Calcined Clay Cement). The foaming and the incorporation of hemp particles contribute to the creation of a porous material with enhanced acoustic insulation properties. Pastes with various compositions were produced to analyze the compatibility of earth and LC3. The results showed compressive strengths at 90 days of hydration evolving between 0.5 MPa and 3.2 MPa adjusting the LC3-content. Multiple foam formulations were developed by varying the proportions of hemp, water, and surfactant. These samples were then characterized in the laboratory to assess the link between the formulation and the porosity.
