Effect of different binders on the thermal, moisture, fire and acoustic performance of hemp fiber composite materials

Hemp's low density and high thermal insulation capacity, along with its environmentally friendly properties such as rapid growth, biodiversity support, and carbon sequestration, contribute to improved energy efficiency and structural durability in building boards. This thesis explores the potential applications of these boards, the effects of varying material ratios, and their overall performance. The study aims to contribute significantly to the development of innovative and sustainable solutions in the construction industry. Using hemp shiv as a construction material has the potential to reduce environmental impacts while enhancing energy efficiency. An experimental setup was established using raw MDF at the Construction Laboratory of Konya Technical University, Technical Sciences Vocational School. In this setup, Group 1 boards were produced using 35%, 25%, and 15% hemp shiv, clay, and lime. Group 2 boards were made with the same hemp shiv ratios, but with the addition of cement to the mixture. All boards were produced with a width and height of 50 cm and a thickness of 5 cm. The boards were used for internal wall cladding. Experiments were conducted at ambient temperatures of 15, 20, 25, 30, 35, and 40°C. Additionally, tests were performed at fixed temperatures for frequencies of 100, 125, 250, 500, 1000, and 2000 Hz. Thermal and acoustic performance, single-point combustion resistance, and moisture content were evaluated across six different material types. Results showed that the board with 35% hemp shiv, clay, and lime had the lowest heat and sound transmission. The highest fire resistance was observed in the board containing 15% hemp shiv, clay, lime, and cement. The highest moisture content was found in the board with 35% hemp shiv, clay, and lime.