Conventional concrete in its existing form possesses characteristics like better compressive strength, density, resistance against moisture and enhanced performance under various exposure conditions like elevated temperature and long-term durability etc. However, some of the shortcomings such as reduced ductility, brittleness can be improved by using additives like fibers to improve its properties. The present study highlights the performance evaluation of engineering properties and life cycle assessment (LCA) of hybrid fiber reinforced concrete (HFRC) incorporating with glass and polypropylene fibers in equal proportions (0%, 0.5%, 1.0%, 1.5%, and 2.0%). In addition to these, impact resistance at first crack phase and post cracking phase i.e., at failure have also been investigated to ascertain the effect of HFRC vs conventional concrete mixes. Sorptivity studies also performed to find its effect on HFRC, and control concrete mixes prepared with and without glass and polypropylene fibers. Reduction in workability of concrete was observed with increase in hybrid fiber content. Superior performance in terms of strength and durability properties was observed at 1% hybrid fiber content. Similarly, this study also focuses on studying the impact of HFRC and conventional concrete on environment using LCA approach. For LCA, SimaPro software and EcoInvent database is used to compare environmental impact assessment of HFRC and conventional concrete mixes. Impact on environment and cost comparison on HFRC mixes exhibits satisfactory results when compared to conventional mix. Finally, this research will address the need for HFRC mixes to achieve their adaptability in construction sector to make concrete economic and environmentally friendly.

中文翻译：

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混合纤维增强混凝土的工程性能和生命周期评估的性能评估：一种可持续的方法

现有形式的常规混凝土具有更好的抗压强度、密度、抗湿性以及在高温和长期耐久性等各种暴露条件下增强的性能等特性。但是，一些缺点，例如延展性降低、脆性等可以改善通过使用纤维等添加剂来改善其性能。本研究重点介绍了等比例（0%、0.5%、1.0%、1.5% 和 2.0%）混合玻璃纤维和聚丙烯纤维的混合纤维增强混凝土（HFRC）的工程性能评估和生命周期评估（LCA） ）。除此之外，还研究了首次裂纹阶段和后裂纹阶段（即失效时）的抗冲击性，以确定 HFRC 与传统混凝土混合物的效果。还进行了吸着性研究，以发现其对 HFRC 的影响，并控制使用和不使用玻璃和聚丙烯纤维制备的混凝土混合物。随着混合纤维含量的增加，观察到混凝土的和易性降低。在 1% 的混合纤维含量下，观察到在强度和耐久性方面的优异性能。同样，本研究还重点利用LCA方法研究HFRC和常规混凝土对环境的影响。对于 LCA，SimaPro 软件和 EcoInvent 数据库用于比较 HFRC 和传统混凝土混合物的环境影响评估。与传统混合物相比，HFRC 混合物对环境的影响和成本比较显示出令人满意的结果。最后，本研究将解决 HFRC 混合物的需求，以实现其在建筑领域的适应性，从而使混凝土经济且环保。