Enhanced mechanical, thermal and fire resistance performance of expanded polystyrene-based fiber-reinforced mortar made with limestone-calcined clay cement (LC3)

Mechanical Performance of Hybrid Fibre Reinforced Magnesium Oxychloride Cement-Based Composites at Ambient and Elevated Temperature

“…Figure 12b further shows the micrograph at 200 • C which clearly displays the intact basalt fibres and some channels due to the melting of PP fibres. As previously mentioned, the melting of PP fibres led to these vacant channels which in turn helped in the dissipation of pore pressure and may have reduced internal stresses [27]. Figure 12c shows the decomposed FRMOCC, showing MgO in a light colour.…”

“…Up to 200 • C, significant water evaporation and fibre melting occur, initially limiting space for water vaporisation and leading to internal stresses. However, as the temperature increases further, the situation improves since PP fibres completely melt, allowing better vapor migration and preventing internal stress and associated cracks [27,38].…”

“…Low-melting point fibres such as polypropylene (PP), PE, and polyvinyl alcohol have been identified to enhance resistance against spalling. These fibres undergo melting after thermal exposure, creating channels that facilitate the dissipation of water vapours and enhance resistance against spalling [27]. Additionally, high-melting point fibres such as steel or basalt fibres have also demonstrated the ability to preserve the integrity of specimens following exposure to elevated temperatures [28].…”