Strain-hardening cement-based composites (SHCC) have recently been developed as repair materials for the improvement of crack control and strength of flexural members. This work focuses on strengthening and flexural enhancement using SHCC layer in tensile regions of flexural members under three different curing conditions. The curing conditions simulate the effect of different environmental conditions prevailing in the central and coastal regions of the Arabian Peninsula on the properties of SHCC as a retrofitting material. In this investigation, beams with SHCC layer were compared to control beams. The beams with SHCC layer of 50-mm thickness were cast. The results revealed that the flexural behavior and the load-carrying capacity of the normal concrete beam specimens under hot and dry environmental conditions were significantly reduced, lowering the ductility of the section. However, compressive strength is comparatively unaffected. Similarly, the hot curing conditions have also led to a notable reduction in the loading capacity of the beam with SHCC layer with a slight effect on its stiffness. On the other hand, steam-curing conditions have shown improvement in load-carrying capacity and a reduction in section ductility of the beam with SHCC layer. It was found that the structural unit retrofitted with SHCC layer was a curing-regime dependent as the tensile and strain-hardening properties of SHCC are highly sensitive to the alteration in the cement hydration process. A normal curing regime was found effective and satisfying the practical, cost, and performance requirements. Accordingly, a normal curing regime could be implemented to retrofit reinforced concrete (RC) beams with SHCC layers as recommended in the study.

应变硬化水泥基复合材料（SHCC）最近已被开发为修复材料，用于改善裂缝控制和挠曲构件的强度。这项工作的重点是在三种不同的固化条件下，在挠曲构件的拉伸区域中使用SHCC层进行强化和挠曲增强。固化条件模拟了阿拉伯半岛中部和沿海地区普遍存在的不同环境条件对SHCC翻新材料性能的影响。在这项研究中，将具有SHCC层的光束与控制光束进行了比较。浇铸具有50mm厚度的SHCC层的梁。结果表明，在炎热和干燥的环境条件下，普通混凝土梁试样的抗弯性能和承载能力均显着降低，降低型材的延展性。但是，抗压强度相对不受影响。类似地，热固化条件也导致具有SHCC层的梁的承载能力显着降低，而对其刚度的影响却很小。另一方面，蒸汽固化条件显示了具有SHCC层的梁的承载能力的改善和截面延展性的降低。发现SHCC层改型的结构单元取决于固化方式，因为SHCC的拉伸和应变硬化特性对水泥水化过程的变化高度敏感。发现正常的固化方案是有效的并且满足实用，成本和性能要求。因此，