This paper explores and analyses how reinforced concrete beams, can be restored and repaired after sustaining damage from monotonic loading. Epoxy resin was used to repair the beams. By employing a technique known as the “acoustic emission (AE)” technique, the damage sustained by the beams under monotonic loading can be evaluated. The reference beam (S1C), and the repaired beam (S4B), were both prepared. The load, the acoustic emission parameters, and the crack modes were investigated and analysed. The signal strength, rise angle value, and average frequency were analysed and discussed. The S4B was found to produce a maximum load that measured higher than the S1C. However, the AE analyses indicated a different result where the S4B produced a lower value than S1C. The average frequency and rise angle value with the patterns of cracks on the beams are directly correlated. Hence, two cracks were identified i.e. tensile and shear cracks. It is safe to deduce that to assess the soundness of the epoxy injected concrete beams, the AE technique can be applied.

本文探讨并分析了钢筋混凝土梁在承受单调荷载的破坏后如何​​进行修复。环氧树脂用于修复梁。通过采用称为“声发射（AE）”技术的技术，可以评估梁在单调载荷下承受的损伤。准备参考光束（S1C）和修复光束（S4B）。研究并分析了载荷，声发射参数和裂纹模式。分析并讨论了信号强度，上升角值和平均频率。发现S4B产生的最大负载高于S1C。但是，AE分析表明结果不同，其中S4B产生的值低于S1C。平均频率和上升角值与梁上的裂纹模式直接相关。因此，确定了两个裂纹，即拉伸裂纹和剪切裂纹。可以安全地推断出，可以使用AE技术来评估环氧树脂注入的混凝土梁的稳固性。