Abstract

In this study, the behavior of mussel shell as a component of passive fire protection materials was evaluated. To investigate the performance of mussel shell waste, different gypsum replacement ratios were analyzed from 40 to 80 % wt. Two different kinds of shells, separately or as a mix, were employed. In addition, two different particle size distributions, smaller than 320 μm and bigger than 320 μm, were used. Physical, mechanical, insulating capacity and leaching properties were thoroughly analyzed. Our results indicate that replacements lower than 60 % wt comply with all mechanical demands and have no reduction in insulating capacity. Additionally, no leaching problems were detected. Mortars made by combination of mussel shell and gypsum have the potential to be used as a component in construction materials for passive protection against fire.