The use of agribusiness residual lignocellulosic fibres can be a good alternative in the
development of lignocellulosic composites. The current work aimed to investigate the thermal
performance of cement-based composites with lignocellulosic materials: Eucalyptus, sugarcane
bagasse, coconut fibre in comparison with commercial gypsum board to be used as internal
partitions of the building using infrared thermal images. Three repetitions for each kind of
lignocellulosic material were made, and three commercial gypsum boards were used. In the
production of the panels, the following parameters were applied: material and cement ratio,
1:2.75; water and cement ratio, 1:2.5; hydration water rate of 0.25; additive, 4% (based on cement
mass). The calculations were performed for a nominal panel density of 1,200 kg m-
³. The thermal
analysis was performed in a chamber composed of MDP (Medium-Density Particleboard) and
with an internal layer of rock wool and the heat source (thermal resistance). For the superficial
temperature measurement, a FLIR E75 camera was used to capture the infrared images. When
the internal temperature of the chamber stabilized at 50 °C, an infrared thermal image was
collected from each side of the composite. Thermal properties were analysed: thermal
conductivity, resistivity, resistance, and transmittance. Based on the results, sugar cane cement
composites were characterized by higher values of thermal conductivity. Related to thermal
resistivity, thermal resistance, and thermal transmittance, only the coconut panel presented
similar behaviour to the commercial gypsum board. Thus, cement composite using coconut can
be a potential alternative that might solve energy and environmental concerns simultaneously
