Industrial fly ash impregnated glass fibre reinforced polymer (GFRP) composites were examined to assess their overall characteristics in adverse ambient conditions, keeping in mind that use of filler materials in FRP composites was expected to enhance the strength properties of the material. GFRP composite specimens with 2–10 wt % industrial fly ash were fabricated in the laboratory. These were exposed to open ambient ageing for 120 days. The samples impregnated with 8 wt % fly ash and aged for 120 days were seen to absorb the minimum moisture and exhibited the maximum ILSS of 35.19 MPa and flexural strength of 690 MPa, respectively. These samples also exhibited the highest Tg of 101.53°C as revealed through low temperature DSC. It was also observed that the 8 wt% fly ash containing samples aged in the open for 120 days showed the ILSS to be 5.83% higher and Tg to be 21.95% higher as compared to the unaged GFRP samples without fly ash. FTIR spectra confirm the trend of thermo-mechanical properties. Both optical and scanning electron microscopy of the fractured surfaces of the test samples revealed the modes of mechanical failure of the hybrid GFRP composite with their indicative properties at optimized extent of fly ash dispersion.

中文翻译：

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工业废物填充粉煤灰的户外老化混合玻璃纤维增​​强聚合物复合材料的力热评估

对工业粉煤灰浸渍玻璃纤维增​​强聚合物 (GFRP) 复合材料进行了检查，以评估其在不利环境条件下的整体特性，同时记住，在 FRP 复合材料中使用填充材料有望提高材料的强度性能。在实验室中制作了含有 2-10 wt% 工业粉煤灰的 GFRP 复合材料样本。将它们暴露于开放环境老化 120 天。观察到用 8 wt% 粉煤灰浸渍并老化 120 天的样品吸收的水分最少，并分别表现出 35.19 MPa 的最大 ILSS 和 690 MPa 的弯曲强度。这些样品还表现出最高的 TG通过低温 DSC 显示为 101.53°C。还观察到，含有 8 wt% 飞灰的样品在露天老化 120 天后，ILSS 提高了 5.83%，TG与不含粉煤灰的未老化 GFRP 样品相比，高 21.95%。FTIR 光谱证实了热机械性能的趋势。测试样品断裂表面的光学和扫描电子显微镜揭示了混合 GFRP 复合材料的机械故障模式及其在飞灰分散程度优化下的指示性能。