Application Of Elevated Temperatures On Cement Mortars With Fly Ash, Manufactured Sand And Polypropylene Fibers
DOI:
https://doi.org/10.64252/a4m3mc82Keywords:
fiber-reinforced mortar, fly ash, manufactured sand, elevated temperature, compressive strength, flexural strengthAbstract
This study examines the effect of elevated temperatures on the mechanical properties of fiber‑reinforced cement mortars incorporating supplementary materials. The experimental program focused on 1:3 and 1:4 mortar mixes, where cement was partially replaced by fly ash and river sand was partially substituted by manufactured sand (M‑sand). Selected mixes also included 0.25 % (by weight of cement) Recron polypropylene fibers. After 28 days of curing, the cube specimens (70.6 × 70.6 × 70.6 mm) and prismatic specimens (160 × 40 × 40 mm) were subjected to temperature exposures of 200 °C, 400 °C, and 600 °C to simulate fire or severe thermal conditions. The specimens were tested at room temperature (27°C) also. Compressive and flexural strengths were determined for each condition. Results show that the inclusion of fibers, fly ash, and M‑sand significantly improves residual strength and thermal resistance compared to control mixes. The findings contribute to the development of sustainable, fiber‑reinforced mortars with enhanced performance under high-temperature environments.