In the present investigation, the structural behavior of reinforced geopolymer concrete (RGPC) beams containing steel fiber has been studied. Four‐point flexural loading condition was applied in this experimental study; for testing the RGPC beams. The deflections of the RGPC were gauged at the mid‐span of the specimens. The crack patterns and failure mode of RGPC beam specimens were measured during the testing process. From these measurements, it has been observed that the steel fibers control cracking due to plastic and drying shrinkages. The length and width of cracks generally improved with the increment of steel fiber content. The findings also indicate that the flexural strength and elastic modulus of RGPC are remarkably enhanced due to the incorporation of steel fibers. Furthermore, the failure mode of RGPC is almost similar to the failure mode of conventional concrete. However, the RGPC performed better than the conventional concrete in terms of flexural strength and other mechanical properties. It has also been noticed that the increase of a/d ratio results in shifting the flexural failure mode in the mid‐span regions towards the support points. The experimental results have been compared with the relevant published literature as well as with the different standard codes.

中文翻译：

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含钢纤维的常温固化土工增强混凝土梁的结构性能

在目前的研究中，已经研究了包含钢纤维的增强地聚合物混凝土（RGPC）梁的结构性能。在本实验研究中采用了四点挠曲加载条件。用于测试RGPC光束。在样品的中跨处测量RGPC的挠度。在测试过程中测量了RGPC梁试样的裂纹模式和破坏模式。从这些测量中，已经观察到钢纤维控制了由于塑性和干燥收缩引起的开裂。裂纹的长度和宽度通常随着钢纤维含量的增加而改善。研究结果还表明，由于掺入了钢纤维，RGPC的弯曲强度和弹性模量得到了显着提高。此外，RGPC的破坏模式几乎与常规混凝土的破坏模式相似。然而，就抗弯强度和其他机械性能而言，RGPC的性能优于常规混凝土。还已经注意到，a / d比导致中跨区域的弯曲破坏模式向支撑点移动。实验结果已与相关的公开文献以及不同的标准代码进行了比较。