The PDF discusses the effects of shape and size on the behavior of unfired clay bricks, particularly those made from Brussels earth residues. During testing for a project involving the transformation of these residues into building materials, several observations were made regarding the impact of brick dimensions and shapes on test results. Key points include: - The mass loss during immersion tests varies depending on the size and shape of the bricks. - A proposal was made to standardize the immersion depth relative to brick dimensions to ensure consistent results. - The presence of "frogs" (indentations in bricks) can affect water adsorption and compressive strength results. - Air velocity in climatic test conditions was found to influence water adsorption results, suggesting the need for controlled air speeds during testing. - Various standards (DIN 18945, NF XF P13-901) were referenced, with different methods of cutting and testing bricks to study compressive strength and failure points.